ManitobaMaterialsConference2016

May10th,2016Engineering&InformationTechnologyComplexAtrium

PosterAbstracts

Hostedby

SponsoredbyUniversityofManitoba,OfficeoftheVice-President(ResearchandInternational)

UniversityofManitoba,FacultyofScienceUniversityofManitoba,ClaytonH.RiddellFacultyofEnvironment,Earth,andResources

UniversityofManitoba,FacultyofEngineeringSystemsforResearchInnovateManitobaRoyalCanadianMint

EnviroTrec

TheabstractscontainedwithinthedocumentrepresentaselectionofworkundertakenwithinMIMoverthelastyear.Thisinternaldocumentisnotintendedforpublicationordissemination.

ComplexNaturalSystems1 Dzananovic,Edis

StructuralcharacterizationofinteractionbetweendsRNA-bindingproteinkinaseanditsinhibitorAdenovirusvirus-associated(VA)RNAI

34 Fazelkhah,AzitaEstimationofIntracellularIonConcentrationsandCytoplasmConductivityforCHOcells

3 Liu,YuqingA3-Dmulticellulartumorspheroidonultrathinmatrixcoatedsinglecancercellsprovidesatumormicroenvironmentmodeltostudypithelial-to-mesenchymaltransitions

4 Ma,DaisyFTIRspectrochemicalimageofanalysishippocampalcellsincontrolandtransgenicAlzheimer’sDiseasemice

2 Sharpe,RyanMassBiasCorrectionsforU-PbIsotopicAnalysisbySecondaryIonMassSpectrometry:ImplicationsforU-PbDatingofUraninite

CompositeMaterialSystems11 Bahmer,M

NovelParticulateReinforcedMultifunctionalComposites12 Dunnigan,Ross

TribologyofPolymerMatrixComposites(PMCs)fabricatedbyAdditiveManufacturing

5 Freitas,PedroEffectofadditionofdoxycyclineindentaladhesivesonthemechanicalpropertiesoftooth-restorationinterface

13 Ghosh,SujanMAX-Polymer(MAXPOL)MultifunctionalComposites

58 Giesbrecht,PatrickElectrocatalyticReductionofCarbonDioxideusingN-Heterocycles

49 Guillermic,Reine-MariePDMS-basedacousticimpedance-matchedmaterialinwater

6 Nickel,RachelAntibacterialcoatedmagneticnanoparticles:anewwaytotreatinfection

8 SHArKSHArKNorth:InvestigatingMetalOxidesasWaterOxidationCatalysts

53 Thakur,SandeepSeparationOfFibreAndShivesFromDecorticatedFlax

CompositeMaterialSystemsContinued9 Shateri,Mohammadhadi

EffectofPropagationLengthonTheTime-BasedFeaturesofAcousticEmissionSignalsSubjectedinEarlyFailureWarningofFiberReinforcedPolymerRods

7 Vykhodtsev,AntonDielectricresponsemeasurementsofhighvoltageinsulatingmaterialsforoutdoorapplications

CrystallineMaterialsandNanostructures22 Darabi,MohammadAli

Engineeringtheheart:Evaluationofconductivenanomaterialsforimprovingimplantintegrationandcardiacfunction

21 Engel,JordanFourPointProbeMeasurementsofSiliconMicrowires

10 Khosrozadeh,Ali Flexiblepolyaniline-basedcompositefilmsforelectrodesofhigh-performance

supercapacitors23 Leung,Craig

TheEffectsofAlcoholonthePrematureRuptureofPETProstheticGraftMaterials

14 Levin,KirillNMRanalysisofparamagneticM(acac)x(M=Cr,Fe,Cu)coordinationcompounds:whichresonancesareobservable?

16 Lussier,JoeyStabilizationoftheDefectFluortieStructureinScMO3(M=V,Ti)

17 Manna,PalashKumarBiocompatiblesphericalandnon-sphericalironoxidenanoparticlesformagneticfieldtargeteddelivery

18 Manna,PalashKumarInterfacemixinginexchangebiasedsystems:Doesitalwaysaffecttheexchangecoupling?

24 Newman,KellyOptimizingthemagnetismofFeCousingsizeandsilicacoatingtoforminterfacialmetalsilicates

6 Nickel,RachelAntibacterialcoatedmagneticnanoparticles:anewwaytotreatinfection

47 Oncel,NuriIridium-silicidenanowiresonSi(110)surface

19 Paiva,DenisDielectricpropertiesoftheSr3WO6atRF/microwavefrequencies

20 Sharma,ArzooExplorationofMagneticPropertiesofNewBerylliumSubstitutedLangasitesA3Ga3Ge2BeO14(A=Pr,Nd,Sm,Eu)

CrystallineMaterialsandNanostructuresContinued56 Skoropata,Elizabeth

Core-shellnanoparticlemagnetism:Theimpactofinterfacialintermixing15 Whattam,Jessica

AnInnovativeInSituMethodforAnalyzingOandHIsotopesinTourmalineUsingSIMS

HighPerformanceComputing27 Kour,Gurpreet

Computationalscreeningofpotentialsingletfissionmolecules26 Perkins,Jeffery

CanComputationalParametersBeCorrelatedtoExperimentalEfficienciesofDyeSensitizedSolarCells?

25 Wei,AoranInteractionofGoldNanoparticleswithProteinStudiedbyAtomisticSimulations

HighTemperatureAerospaceMaterials30 Asala,Gbenga

AnalysisofNbSegregationEffectsonGammaPrimePrecipitationBehaviourofATI718PlusSuperalloyWeld

28 HeggadadevanapuraThammaiah,MallikarjunaIsothermalOxidationComparisonOfThreeNi-BasedSuperalloys

29 Olatunji,OluwadamilolaInfluenceofliquid-statediffusiononmicrostructureofTLPjointbetweendissimilarsinglecrystalsuperalloyswithdifferentorientations.

31 Steen,JaredNovelStructuralCeramicsbyMicrostructureDesign

MechanicsofMaterialsandStructures33 Sosnowski,Emil-Peter

CharacterizingSterilizationEffectsonMaterialStrengthof3D-PrintedBiocompatiblePlastics

32 Strybulevych,AnatoliyTheUseofSynchrotronX-raysandUltrasonicsforInvestigatingtheBubbleSizeDistributionandItsEvolutioninDough

MEMS/MicrofluidicSystems41 Afsharipour,Elnaz

DesignandfabricationofSi/SiO2distributedBraggreflectorsbyreactiveRFmagnetronsputtering

40 Glowacki,PawelAninfraredspectrometerbasedonaMEMSFresnelzoneplateformeasuringincipientfaultgasesinhighvoltageequipment

39 Li,MeitingResonanceBasedMEMSMagneticFieldSensor

38 Liyanage,SampathButterflyBasedMEMSDCelectricfieldsensorwithmodulatedsensitivity

37 Park,ByoungyoulDevelopmentofaNovelMEMSBasedHorseshoeshapedLorentzActuatorArrayforAdaptiveOptics

35 Woods,BoPolymerElectrolytePotentiometricVolatileSensor

36 Zhou,YuDesignandFabricationofAMicromachinedLowVoltageElectrostaticActuatedDeformableMirrorSystem

PhotonicandPhononicInteractions41 Afsharipour,Elnaz

DesignandfabricationofSi/SiO2distributedBraggreflectorsbyreactiveRFmagnetronsputtering

40 Glowacki,PawelAninfraredspectrometerbasedonaMEMSFresnelzoneplateformeasuringincipientfaultgasesinhighvoltageequipment

44 Harder,MichaelTheCoherenceofStrongSpin-PhotonCoupling

43 Hyde,PaulIndirectCouplingBetweenTwoCavityPhotonSystemsviaFerromagneticResonance

42 Kaur,SandeepVoltageControlofCavityMagnonPolariton

45 Lozada,IssiahNewluminescenttransitionmetald10complexessupportedbyphenanthridine-basedligands

QuantumMaterials46 Kiefer-Emmanouilidis,Maximilian

SuperdiffusiveSpinTransport47 Oncel,Nuri

Iridium-silicidenanowiresonSi(110)surface

SoftandDisorderedMaterials49 Guillermic,Reine-Marie

PDMS-basedacousticimpedance-matchedmaterialinwater51 Kerhervé,Sébastien

AnomalousDiffusionofUltrasoundinclose-packedSuspensionsofAluminumBeads

48 Krishnamurthy,ArunStructureandphaseseparationinborosilicateglasses

52 Petrelli,BerardinoVitaminADeficiencyasaMurineModelofFetalAlcoholSpectrumDisorder(FASD):CharacterizationofFAS-LikeCraniofacialandNeurodevelopmentalMalformations.

33 Sosnowski,Emil-PeterCharacterizingSterilizationEffectsonMaterialStrengthof3D-Printed

50 Sun,XinyangEffectsofingredientsandmixingontherheologicalpropertiesofbreaddough

53 Thakur,SandeepSeparationOfFibreAndShivesFromDecorticatedFlax

59 Vahora,TasneemSurfaceCharacterizationofCanolaFibre(BrassicanapusL.)UsingScanningElectronMicroscopy

SurfacesandInterfaces57 GarridoDamaceno,Guilherme

Concentrationdependentdiffusionmodellingofelectrodepositedtinonacoppersubstrate

58 Giesbrecht,PatrickElectrocatalyticReductionofCarbonDioxideusingN-Heterocycles

54 Kang,OnkarMixedmonolayerattachmentofvFc/MetoSimicrowirearrays

55 Moran,IanComparisonofFoulingMechanismsofFourNanofiltrationMembranes:OptimalMembraneSelectionforStephenfieldRegionalWTP,MB,Canada

SurfacesandInterfacesContinued2 Sharpe,Ryan

MassBiasCorrectionsforU-PbIsotopicAnalysisbySecondaryIonMassSpectrometry:ImplicationsforU-PbDatingofUraninite

56 Skoropata,ElizabethCore-shellnanoparticlemagnetism:Theimpactofinterfacialintermixing

59 Vahora,TasneemSurfaceCharacterizationofCanolaFibre(BrassicanapusL.)UsingScanningElectronMicroscopy

PosterNumber:1

StructuralcharacterizationofinteractionbetweendsRNA-bindingproteinkinaseanditsinhibitorAdenovirusvirus-associated(VA)RNAI

Presentedby:EdisDzananovicPhDCandidateattheUniversityofManitoba,DepartmentofChemistryAdvisor(s):SMcKennaCo-Author(s):EdisDzananovic,TrusharR.Patel,Astha,GrzegorzChojnowski,KevinMcEleney,JanuszM.BujnickiandSeanA.McKennaResearchArea(s):ComplexNaturalSystemsThe mammalian innate immune system provides a first line of defence against microbialpathogens and also serves to activate an antigen-specific acquired immune program. Keycomponentsof innate immunityare the interferons (IFNs), a familyof related cytokines. TheIFNsexerttheireffectsthroughthestimulationofnumerousgenes,oneofwhichisthedouble-strandedRNA-dependentSer/Thrproteinkinase(PKR),akeyantiviralproteinfoundinhumancells.AfterbindingtoviraldsRNA,PKR isautophosphorylatedand inturnphosphorylatesthealpha-subunit of eukaryotic translation initiation factor 2, causing attenuationof cellular andviral protein synthesis. Certain viruses specifically transcribe dsRNA that bind to PKR andthereby prevent its autophosphorylation. We are investigating one such inhibitor, theadenovirus virus-associated (VA) RNA I. VAI RNA contains 3 stem-loop regions; apical PKR-bidingstem-loop,centralinhibitorystem-loop,andterminalregionthatisshowntonotaffectbindingor inhibitionofPKR.Weare interested in studyingspecific featuresof inhibitors thatenablesthemtobindtoPKRandinhibititsfunction.WehavecreatedmutantversionsofVAIRNA and testedwhether thesemutations impact binding and/or inhibition of PKR.We havealso taken advantage of in-house small angle scattering instrumentation to obtain low-resolutionstructuraldataonPKR-dsRNAcomplexes.SAXSenvelopesandrawdatawerethenused as constraints for computational tertiary RNA structure prediction. Taken together, weproposethataspecificpseudoknotRNAfoldisrequiredforefficientinhibitionofPKR.

PosterNumber:2

MassBiasCorrectionsforU-PbIsotopicAnalysisbySecondaryIonMassSpectrometry:ImplicationsforU-PbDatingofUraninite

Presentedby:RyanSharpeResearcherattheUniversityofManitoba,DepartmentofGeologicalSciencesCo-Author(s):MostafaFayekResearchArea(s):ComplexNaturalSystemsAgedatingusing theuranium (U)-lead (Pb) system iswell establishedand the techniquehasbeen applied, with much success, to many minerals (e.g. zircon) using secondary ion massspectrometry (SIMS). However, the application to uranium-rich minerals (i.e. uraninite) hasproved less successful, often producing erroneous results. Uranium- Pb geochronology ofuraniniteiscriticaltothestudyofthegenesisofUdepositsthroughouttheworld.IncorrectU-PbagesonlyprovetocomplicatethestudyofthesealreadycomplexUsystems.UraniumandPbisotoperatiosweremeasuredinthreeuraninitereferencematerials(RM)withvarying Pb content and three samples with unknown U-Pb isotope compositions using aCAMECA 7f SIMS instrument. Measurements were made using a primary beam of O-accelerated at 12.5 kV. A mass resolving power of 1300 and a 50-volt offset were used tominimize interferences. The study demonstrates that the mass bias for U-Pb isotope ratiomeasurements inuraninitevariesasa functionofPbcontent.Athree-pointcalibrationcurvewasdevelopedusinguraniniteRMwithlow-,intermediate-andhigh-Pbcontents.Corrected ratios for both concordant and discordant uraninite were plotted on a Concordiadiagramtodemonstrate theeffect thatdifferentcorrection techniqueshaveon the resultingage.FordiscordanturaninitetheresultsshowthatU-Pbagescanbeinaccuratebyasmuchas130Ma.Whereas,forconcordanturaninite,correctionusingthevaryingtechniquesresults insimilaragesyettheirrelativepositionontheConcordiadiagramchangesdrastically.

PosterNumber:3

A3-Dmulticellulartumorspheroidonultrathinmatrixcoatedsinglecancercellsprovidesatumormicroenvironmentmodeltostudypithelial-to-

mesenchymaltransitionsPresentedby:YuqingLiuPostdoctoralFellowattheUniversityofManitoba,DepartmentofMechanicalEngineeringAdvisor(s):M.X.XingCo-Author(s):MalcolmXingResearchArea(s):ComplexNaturalSystemsIntumorprogression,thehypoxia-mediatedepithelial-to-mesenchymaltransition(EMT)worksas an important survival pathway, where epithelial cells lose their polarized properties andacquiremesenchymal characteristics.Although it is known that EMT is closely related to themicroenvironmentofcarcinomagrowth,itsdefinitemechanismunderthemicroenvironmentisstillelusive.Whilemostrelatedresearchstudiesbasedonatwo-dimensional (2D)monolayerculture, which was obviously deviated from the real solid tumor environment, such as thecellularmorphology,proliferation,differentiation,andinteractionsbetweencell-cellandcell-extracellular matrix. Currently, various kinds of 3D models were developed, such asmulticellular tumorsuspensionspheroids (MCTs)and3DbiopolymericMatrices,but thepoorcontrolover tumorstructureandphysic-chemicalproperties limitedtheirapplications. In thisstudy,a3Dmulticellular tumorspheroidmicroenvironmentwasdevelopedbyusing layer-by-layer (LBL) ultrathin film on single tumor cell to form niche-like matrix and sequentiallyassembling. The difference of 2D cultured cells and 3D cellswas examined by cellular CD47,mTOR,ERKandHIFsignaling,aswellastheirexpressionsoftwoEMTrelatedfactors:E-andN-cadherin in vitro and in vivo. This 3D spheroid model provides an alternative and flexibleapproachtostudytumorprogress.

PosterNumber:4

FTIRspectrochemicalimageanalysisofhippocampalcellsincontrolandtransgenicAlzheimer’sDiseasemice

Presentedby:DaisyMaUndergraduateStudentattheUniversityofManitoba,DepartmentofChemistryAdvisor(s):KMGoughCo-Author(s):A.R.Capan,C.R.Findlay,B.A.Albensi,K.M.GoughResearchArea(s):ComplexNaturalSystemsThelongtermfocusofthisresearchisthedevelopmentoftherapeuticsforenhancingmemory,andforpreventingand/orreversingmemory impairment inAlzheimer'sDisease(AD).Tothatend,weseekamolecular-levelunderstandingofthechangesinADbrain.Wehaveconductedrapidexvivowidefieldspectrochemicalimagingwith~1µmpixelresolutionwithathermalIRsourceandFocalPlaneArray, in-house,ontissuesectionsfromcontrolandtransgenicmousemodelsforAD.Mousemodelsincludedatriply-transgenicmouseline:3xTg,acommoncontrol:C57BL/6,adoublytransgenicline:TgCRND8andtheirwildtypelittermates:wtCRND8.Unfixed,snap-frozen, cryosections were desiccated overnight and imaged within 48 hours to avoidtissue oxidation. Given the multifactorial origins of AD, we are focused on the temporalevolution and molecular composition of senile plaques and neurofibrillary tangles (thehallmarks of diseased brain). Data were processed in MATLAB to select only those spectraassociated with the cell bodies in the Cornu Ammonis (CA1) and subiculum, where earlychanges can be detected through standard staining methods. FTIR spectrochemical imaginganalysis permits the simultaneous detectionofmultiple biological components; here,we areseeking features that may be overlooked or altered by histopathological andimmunohistochemicalmethods.

PosterNumber:5

Effectofadditionofdoxycyclineindentaladhesivesonthemechanicalpropertiesoftooth-restorationinterface

Presentedby:PedroFreitasResearcherattheUniversityofManitoba,DepartmentofRestorativeDentistryAdvisor(s):SConsani,MGiannini,RFrancaResearchArea(s):CompositeMaterialSystemsMatrix metalloproteinase (MMP) inhibition has been shown to reduce adhesive bonddegradation. Doxycycline is tetracycline derivate that has demonstrated atsubantimicrobialdosagen has displayed a valuable therapeutic role of MMPs. This study examined theincorporation of different dosages of doxyclycline in an experimental dental adhesives.Nanoindentations was performed using a load of 1000 µN andstandard trapezoidal loadfunctionof5-2-5sondentin,hybridlayerandadhesive.NanohardnessandYoung'smodulusofeachareawerecomputedaccordingtotheOliverandPharr'smethod.Controlgroupshowedhigher values for adhesive layer, the experimental groups showed no statistical differencebetween them. The were no difference between groups for Young's modulus values foradhesive. Control group and EXP2 showed higher values for hybrid layer nanohardness,followed by group EXP1 and EXP3. EXP4 group showed lowest values for hybrid layernanohardness,howevertherenodifferenceamongitandEXP3andEXP1groups.Experimentalgroups showed increase in Young's modulus of hybrid layer, except for EXP4 that show nodifferencebetweenControlgroup.NanohardnessandYoung'smodulusofdentinwasnotaffectbyincorporationofMMPinhibitor.

PosterNumber:6

Antibacterialcoatedmagneticnanoparticles:anewwaytotreatinfectionPresentedby:RachelNickelUndergraduateStudentattheUniversityofManitoba,DepartmentofPhysicsandAstronomyAdvisor(s):J.vanLieropCo-Author(s):H.Rahma,E.Skoropata,C.Rutley,P.K.Manna,S.Liu,J.vanLieropResearchArea(s):CompositeMaterialSystems,CrystallineMaterialsandNanostructuresMicrobial resistance is quickly becoming a global healthcare problem. Topical biocides are apossiblesolutiontomanyhospitalborninfectionsastheymaybeapplieddirectlytothewoundandhaveabroadspectrumofmicrobialtargets.However,cytotoxicityisaconcern.Withoutamechanismtolimitexposure,cellscriticaltowoundhealingwillalsobekilled.Coatingmagneticnanoparticleswiththedesiredbiocideallowsremovalfromthe infectionsiteusingamagnet,enabling control over contact time. For this application, themagnetic particle coresmust bebiocompatible and modifiable, with a significant magnetic response at room temperature.Sphericalmagnetite particles have been synthesized in a variety of sizes and coatedwithN-chloraminebiocides.Physicalpropertiesoftheuncoatedparticlesweredeterminedusingx-raydiffraction,DLSandSEM.After coating, FTIRandTGAwereused toconfirmbiocidal coating.Magnetic characterization, both before and after coating, was performed via MPMS andMössbauer spectroscopy. Biological tests performed on MRSA and P. aeruginosa show theefficacyofthebiocideisenhancedbythedisruptionofthemediumduringtherecoveryofthenanoparticles. Both 3 nm and 10 nm particles are fully recoverable from a wound simulantwithin2min,thoughthe10nmparticlesareremovedmorequickly.Both20nmnanospheresandnanochainshavebeensynthesizedandcharacterizedforfuturebiocidalstudy.

PosterNumber:7

Dielectricresponsemeasurementsofhighvoltageinsulatingmaterialsforoutdoorapplications

Presentedby:AntonVykhodtsevMScCandidateattheUniversityofManitoba,DepartmentofElectricalandComputerEngineeringAdvisor(s):D.Oliver,B.KordiResearchArea(s):CompositeMaterialSystemsDielectric frequency response measuring technique is one of the non-destructive diagnostictestingusedfortheassessmentofhighvoltageinsulationsystems.Thisworkpresentsdielectricmeasurements of the polymeric insulatingmaterials for outdoor applications. Together withinternationalcollaboratorsintheCIGREworkinggroupD1.59,round-robintestsonsamplesofliquid silicone rubber (LSR), high temperature vulcanized (HTV) silicone rubber (SIR) andethylenepropylenedienemonomer(EPDM)rubberwerecarriedoutandanalyzed.

PosterNumber:8

SHArKNorth:InvestigatingMetalOxidesasWaterOxidationCatalystsPresentedby:SHArKStudentsfromDanielMcIntyreCollegiateInstitute(DMCI)Advisor(s):MsKozoriz,DrHerbertCo-Author(s):L.AllisonAfable,AlexisD.Lavadia,GenesisLozadaResearchArea(s):CompositeMaterialSystemsThe formation of a renewable energy source is one of the largest challenges facing societytoday.One approach involves the splitting ofwater into fuels such as hydrogen and oxygenusing sunlight, in an artificial photosynthetic system. However, a large barrier exists for thewater oxidation process, reducing the efficiency of the system. By using catalysts for wateroxidation, this barrier can beminimized. A promisingmaterial involvesmetal oxidemixturesbecauseoftheirlightabsorptionproperties,robustness,andcosteffectiveness.Butduetothemillions of different combinations available for metal oxide mixtures, determining the idealcatalystcompositionischallenging.ThisworkinvestigatesthewateroxidationcapabilitiesofavarietyofternarymetaloxidemixturesunderilluminationandappliedpotentialusingacustomLED apparatus and potentiostat. By measuring the resulting photocurrent under basicconditions,theviabilityofthesemetaloxidesaswateroxidationcatalystscanbedetermined.Fromthese results,amorecomprehensiveapproach towards the formationofametaloxidecatalystforwateroxidationcanbetaken.

PosterNumber:9

EffectofPropagationLengthonTheTime-BasedFeaturesofAcousticEmissionSignalsSubjectedinEarlyFailureWarningofFiberReinforced

PolymerRodsPresentedby:MohammadhadiShateriMScCandidateattheUniversityofManitoba,DepartmentofElectricalandComputerEngineeringAdvisor(s):D.J.ThomsonResearchArea(s):CompositeMaterialSystemsFiberreinforcedpolymer(FRP)rodshavebeenusedforreinforcingincivilstructuresincludingconcrete structures and steel structures. FRP rods can be used as reinforcing as long as theallowedserviceloadisnotexceeded.TherehavebeendifferentstudiesondevelopingareliablemethodforearlyfailurewarningofFRProdssubjectedtoexceededserviceload,inwhichtime-basedfeaturesofacousticemissionsignalsareused.Inthiswork,AEsignalsdetectedusingtheRMSdetectionmethodduringpencil-leadbreaktestsarestudied.TheattenuationofAEsignalswithin the FRP rods and frequency dependency of AE signals with the increment of thepropagation length are investigated. The results represent that the frequency is almostunchangedwhile theamplitude isattenuatednotablywith the incrementof thepropagationlength.Therefore,itisconcludedthatanalysisbasedonfrequencyfeaturesismoreeffectiveinstudyofearlyfailurewarninginfiberreinforcedpolymerrods.

PosterNumber:10

Flexiblepolyaniline-basedcompositefilmsforelectrodesofhigh-performancesupercapacitors

Presentedby:AliKhosrozadehPhDCandidateattheUniversityofManitoba,DepartmentofMechanicalEngineeringAdvisor(s):MXingResearchArea(s):CrystallineMaterialsandNanostructuresPolyanilineisapromisingpseudocapacitanceelectrodematerialforsupercapacitors.However,itsstructuralinstabilityleadstolowcyclicstabilityandlimitedratecapabilitywhichhindersitspracticalapplications.Flexiblepolyaniline-basedcompositefilmsaredevelopedforfabricationof a high-performance supercapacitor with excellent cyclic stability and tunable energy andpower densities. The electrode is a flexible film of polyaniline, tissue wiper-based cellulose,graphite-based exfoliated graphite and silver nano-particles with potential applications inwearableelectronics.Ourresultsshowthatanultrahighcapacitanceof3.84F/cm2(240.10F/g)atadischargerateof5mAcanbeachieved.Theobtainedpromisingelectrochemicalpropertiesare found to bemainly attributed to an effective combination of polyanilinewith exfoliatedgraphite and silver in a cushiony cellulose scaffold, as well as the porous structure of thecomposite.

PosterNumber:11

NovelParticulateReinforcedMultifunctionalCompositesPresentedby:MBahmerUndergraduateStudentattheUniversityofNorthDakota,DepartmentofMechanicalEngineeringAdvisor(s):SGuptaCo-Author(s):D.Ferguson,R.GeorgesonResearchArea(s):CompositeMaterialSystemsGreendesignhasbecomeaintegralcomponentofresearchforthe21stcentury.Scientistsandresearchers are being continuously challenged on a variety of global issues, includingpopulation growth, rapid urbanization, infrastructure decline, climate change, and waterscarcity. There is a potential to deliver game-changing solutions by designing sustainablematerials. In this poster, as a part of undergraduate research, we will present recentdevelopmentsontheresearchanddevelopmentofnovelvibrationsensitivecompositeswhichcan perform multifunctional functions like energy harvesting, energy storage, and solidlubrication,amongothers.

PosterNumber:12

TribologyofPolymerMatrixComposites(PMCs)fabricatedbyAdditiveManufacturing

Presentedby:RossDunniganMScCandidateattheUniversityofNorthDakota,DepartmentofMechanicalEngineeringAdvisor(s):SGuptaCo-Author(s):S.Ghosh,F.AlAnazi,J.ClemensResearchArea(s):CompositeMaterialSystemsTheintegralprocessofdepositingthinlayersofmaterial,oneafteranother,untilthedesignedcomponent is created is collectively referred to as Additive Manufacturing (AM). Fuseddepositionprocess(FDP)isatypeofAMwherefeedstockisextrudedintofilamentswhichthenaredepositedby3Dprinting,andthesolidificationoccursduringcoolingofthemelt.Currently,complexstructuresarebeingdevelopedbyFDP.Forfurtherdeploymentinthefield,especiallyfor turbomachineryapplications, it is critical tounderstand the tribologicalbehaviorof thesesolids.Inthispresentation,wewillreportthetribologicalbehaviorofdifferentpolymermatrixcomposites fabricated by fused deposition process. These resultswill be comparedwith thebasepolymer.Duringthisstudy,thetribologicalbehaviorofall thesampleswillbeevaluatedwithtab-on-discmethod.

PosterNumber:13

MAX-Polymer(MAXPOL)MultifunctionalCompositesPresentedby:SujanGhoshMScCandidateattheUniversityofNorthDakota,DepartmentofMechanicalEngineeringAdvisor(s):SGuptaCo-Author(s):FaisalAlanaziResearchArea(s):CompositeMaterialSystemsMn+1AXn (MAX) phases (over 60+ phases) are thermodynamically stable nanolaminatesdisplaying unusual, and sometimes unique, properties. These phases possess a Mn+1AXnchemistry,wherenis1,2,or3,Misanearlytransitionmetalelement,AisanA-groupelement,andX isCorN.TheMAXphasesarehighlydamagetolerant, thermalshockresistant, readilymachinable,andwithVickershardnessvaluesof2-8GPa,areanomalouslysoftfortransitionmetalcarbidesandnitrides.Inthispaper,wereportthesynthesisandcharacterizationofnovelMAX-Polymer composites. It is expected that these novel composites can be used formultifunctionalapplications.

PosterNumber:14

NMRanalysisofparamagneticM(acac)x(M=Cr,Fe,Cu)coordinationcompounds:whichresonancesareobservable?

Presentedby:KirillLevinPhDCandidateattheUniversityofManitoba,DepartmentofChemistryAdvisor(s):S.KroekerCo-Author(s):KirillLevin,ScottKroekerResearchArea(s):CrystallineMaterialsandNanostructuresSolid-statenuclearmagneticresonance(NMR)spectroscopyisawidelyusedtechniqueforthecharacterization ofmaterials, its versatility stemming from its sensitivity to variations in theelectronic environments of atoms. However, a recognized drawback of NMR is its limitedapplicability to paramagnetic systems such as organic radicals and many organometalliccomplexes, where unpaired electrons introduce an additional layer of magnetic interactionsthatsignificantlyaltersthenuclearspinbehaviour.Wedescribetheeffectofsuchinteractionson the observable signal widths and intensities of 13C NMR resonances in a series of metalacetylacetonate complexes M(acac)x (M = Cr, Fe, Cu) under fast magic-angle spinning. WedeveloparelativelyrobustmethodtopredictthepossibilityofobservingNMRsignalsunderagiven set of experimental conditions, including the effects of pulse sequence delays andelectron relaxation rates. Preliminarydensity-functional theory calculations andexperimental1HMASNMRresultsareusedtoprovideenoughinformationtoestimatethespectralvisibilityofothertypesofnucleiinthesystem.

PosterNumber:15

AnInnovativeInSituMethodforAnalyzingOandHIsotopesinTourmalineUsingSIMS

Presentedby:JessicaWhattamMScCandidateattheUniversityofManitoba,DepartmentofGeologicalSciencesAdvisor(s):MFayekCo-Author(s):MostafaFayek,T.KurtisKyser,DavidQuirt,FrankHawthorneResearchArea(s):CrystallineMaterialsandNanostructuresTheoxygenandhydrogenisotopiccompositionsofmineralscanprovidevaluable informationon the source of fluids and temperature of mineral precipitation. To obtain accuratemeasurements using secondary ion mass spectrometry (SIMS), it is important to selectchemicallysimilarstandardsandsamples tocorrect forbothmatrixeffects,and instrumentalmassfractionation(IMF),collectivelytermedinstrumentalmassbias(IMB).Forcertaincomplexmineral groups (i.e. tourmalines), there are large variations in major element compositionbetween end members. The current study utilizes three common tourmaline end members(schorl,draviteandelbaite)withthegoalofconstructingcalibrationcurvestocorrectforIMBduringSIMSanalysisofoxygenandhydrogenisotopesintourmaline.Data obtained by SIMS from eight tourmaline grains comprising the three tourmaline endmembers show that mass bias for oxygen isotope measurements correlate with with Feconcentrations in tourmalines and for hydrogen isotopes, mass bias correlates with Mgconcentrations.Therefore,tocorrecttourmalinesforIMBduringoxygenandhydrogenisotopicanalyses,severalstandardsthatcoverawiderangeofFeandMgcontentsshouldbeanalyzedandcalibrationcurvesconstructed.Thecrystallographicorientationcanalsoleadtoadditionalerrors in the IMB of hydrogen isotopes ("orientation effects"). Depending on whether thetourmalinebeinganalyzedhasbeencutasabasalsectionorwhetheranalysesaretakingplaceperpendiculartotheCaxisofthetourmaline,the IMBcanvarybyupto15%.Toresolvetheerrors caused by orientation effects it is recommended to mount standards in multiplecrystallographicorientations.

PosterNumber:16

StabilizationoftheDefectFluoriteStructureinScMO3(M=V,Ti)Presentedby:JoeyLussierPhDCandidateattheUniversityofManitoba,DepartmentofChemistryAdvisor(s):MBieringerCo-Author(s):F.Simon,K.Singh,V.ThangaduraiResearchArea(s):CrystallineMaterialsandNanostructuresFuelcellsarevitaltechnologiesforthefutureofalternativeenergyduetotheirfuelflexibility,lowemissionsandhighconversionefficiency. Ionconductorsassolid-stateelectrolytesplayacrucialroleinimprovingalternativeenergyconversiondevices.Shafi,etal.[1,2]showedthatthestructuralrelationshipbetweenthebixbyiteandfluoritestructurespermitscontrolofoxidationstatesandoxygendefects(A=Sc,In;B=Ti,V).Someproblemsthataroseinthesesystemsincludethat the defect fluorite ScVO3.7 undergoes a non-topotactic (reconstructive) oxidation andresults intheformationofanorderedzirconstructure.Thisoxidativetransitionoccursbelowthetypicaloperatingtemperatureofsolidoxidefuelcells(SOFC)andwilldestroythesolidstateelectrolyte. Furthermore the limitedoxidation stateof Ti only allows theoxidation toABO3.5affectingthe ionconductivity.Wewillpresentourrecentworktostabilizethedefect fluoritestructurebeyondtheoperatingtemperatureofcommonSOFCsinthesesystemsandeliminatethe problems mentioned above. We report synthesis, structural characterization, thermalanalysis,ionconductivitymeasurementsandreactivitystudiesusinginsitux-raydiffraction.References1.Shafi, S. P.; Hernden, B. C.; Cranswick, L. M. D.; Hansen, T. C. Bieringer, M. Inorg. Chem.2012,51,1269-1277.2.Shafi,S.P.;LundgrenR.J.;Cranswick,L.M.D.;Bieringer,M.J.SolidStateChem.2007,180,3333-3340.

PosterNumber:17

Biocompatiblesphericalandnon-sphericalironoxidenanoparticlesformagneticfieldtargeteddelivery

Presentedby:PalashKumarMannaPostdoctoralFellowattheUniversityofManitoba,DepartmentofPhysicsandAstronomyAdvisor(s):JohanvanLieropCo-Author(s):R.Nickel,Y.Wroczynskyj,Z.Sun,D.W.Miller,S.Liu,andJ.vanLieropResearchArea(s):CrystallineMaterialsandNanostructuresMagnetic nanoparticles coated with a suitable biocompatible material enables variousbiomedical applications such as targeted drug delivery, hyperthermia, topical biocideapplicationandremoval,cellulartherapy,andtissuerepair.Theinnatebiocompatibilityofironoxidenanoparticlesmake themoneof thebest candidates for suchpurposes.Additionally,asignificantmagneticfieldresponseunderambientconditionsallowsforthepossibletargetingandremovalusinganexternalmagneticfield.Fortheaboveapplications,nanoparticlesizeandshapearecriticalconsiderationsforapplicationdesignandimplementation.Forexample,ithasgenerally been found that upon injection of biocompatible iron-oxide nanoparticles, thesmallest ones (<10 nm) reside in the the kidney after circulation, while medium sizednanoparticles (10-300nm)populate thebonemarrow, spleen, liver and lymphnodes. Largerparticles (>1 micron, including the coating) accumulate typically in the liver and lungs.Therefore, depending upon the location of the target area, the size and shape of thenanoparticlesmustbe tailored.Shapeanisotropyand the resultingmagnetic fieldprofileandresponsehavenon-sphericalnanoparticlesrespondingdifferentlyinanexternalmagneticfieldaswellastocellsandcomplexmedia.Keepingallofthisinmind,wehavesynthesizedsphericaland non-spherical (e.g. rods of different lengths and aspect ratios) iron-oxide (magnetite -Fe3O4)nanoparticlesofdifferentsizesandcoatedthemwithbio-compatiblematerialssuchasN-(trimethoxysilylpropyl)ethylenediamine triacetate (a latching ligand for additional drug andbiocidecoatingchemistry).Thecrystallitesizesandshapeshavebeendeterminedbyanalyzingx-raydiffractionpatternsandscanningelectronmicroscopyimages,respectively.ThesuccessofthecoatinghasbeenverifiedusingFouriertransforminfraredspectroscopytechnique.Examplebio-applicationexperimentsrevealthatnon-sphericalnanoparticleshaveasignificantlybetterinternalization in endothelial cells compared to spherical ones, with and without externalmagneticfieldapplication.

PosterNumber:18

Interfacemixinginexchangebiasedsystems:Doesitalwaysaffecttheexchangecoupling?

Presentedby:PalashKumarMannaPostdoctoralFellowattheUniversityofManitoba,DepartmentofPhysicsandAstronomyAdvisor(s):JohanvanLieropCo-Author(s):E.Skoropata,Y.-W.Ting,K.-W.Lin,J.W.Freeland,andJ.vanLieropResearchArea(s):CrystallineMaterialsandNanostructuresA ferromagnetic/antiferromagnetic/ferromagnetic type trilayered structure isabasicelementofaspin-valvestructureinharddriveread/writeheadsandfuturespintronicstechnology.Thistrilayerstructurealsoprovidesan idealopportunitytostudythe interplaybetween interlayerand interface exchange coupling. Both exchange bias (interface) and interlayer exchangecouplingsareinterfacedrivenphenomena,andsincetheidealinterfacehastypicallybeenverychallenging to achieve, a clear understanding of the chemical and magnetic natures ofinterfaces is pivotal to identify and understand their influence on the overall physics of themagnetism.Thepresenceofanimperfect interface(duetooxidation,reductionandinterfacemixing)iswidelyrecognizedasanissueandoftenleadstoaninterpretationthattheexchangecoupling inacomposite (core-shellandthin film)system ismediatedbysuch 'imperfections'.Wehaveexploredthepossiblepresenceofsurfaceoxidationand interfacemixing inNi80Fe20(55nm)/CoO(t=23,90,185nm)/Co(55nm)trilayersystemsandtheirelementalcompositionsandsite-specificmagnetism.Element-sensitiveandsite-specificx-rayabsorptionspectroscopy(XAS)andx-raymagneticcirculardichroism(XMCD)techniquesshowthatanoxidizedNi-ferritesurface layer and a Co-ferrite interface layer are non-magnetic and therefore can not beresponsible for theobservednanomagnetism.Our results also indicate that (i) the interlayerexchange coupling betweenNi80Fe20 and Co is occurring despite the thickness of the spacerlayerbeingbeyondtheregimewherethismagnetismisconsideredpossible,and(ii)thebulkofthe antiferromagnet (CoO) layer does not contribute to the exchange bias effect - exchangebias ispurelyaninterfacialphenomenonwithoutanycontributionfromtheintermixedphaseregions.

PosterNumber:19

DielectricpropertiesoftheSr3WO6atRF/microwavefrequenciesPresentedby:DenisPaivaPhDCandidateattheUniversidadeFederaldoCeara,DepartmentofDepartamentodeQuimicaAnaliticaeFisico-QuimicaAdvisor(s):PBAFechine,MASSilva,MBBieringerCo-Author(s):D.V.M.Paiva,M.A.S.Silva,A.S.B.SombraandP.B.A.FechineResearchArea(s):CrystallineMaterialsandNanostructuresThis work reports the dielectric properties of Sr3WO6 (SWO) double perovskite at radiofrequencyasa functionof thetemperatureandastudy inmicrowavesrangetoevaluatethematerial as a novel dielectric resonator. Thermo-activated charge transfer process for SWOceramic was observed and two resistor - capacitor associations were fitted for the Nyquistdiagram. For the microwave range, SWO shows high dielectric permittivity (13.57) anddielectric loss (0.0281). Thedielectric resonator antenna (DRA) fabricated fromSWOceramicpresentedanoperationfrequencyin4.1GHzandreturnlossbelow-40dB.Fromtheseresults,the SWO based DRA shows good properties to be used as a novel microwave dielectricresonator.

PosterNumber:20

ExplorationofMagneticPropertiesofNewBerylliumSubstitutedLangasitesA3Ga3Ge2BeO14(A=Pr,Nd,Sm,Eu)

Presentedby:ArzooSharmaMScCandidateattheUniversityofManitoba,DepartmentofChemistryAdvisor(s):CWiebeCo-Author(s):Silverstein,H.J.;HallasA.M.;Wiebe,C.R.ResearchArea(s):CrystallineMaterialsandNanostructuresLangasiteshaveattractedalotofattentionbecauseoftheirspin-liquidlikecharacteristics.Themagnetic ions in these compounds interact in a trigonal crystal structure and occupy thecornersofthetriangularnetworkformingadistorted2-DKagomelattice.A greater understanding of their ground state is limited by difficulty in synthesizing newmembersbelongingtothisseriesduetoformationofcompetingphaseslikethegarnetphase.Recently we were able to synthesize four newmembers A3Ga3Ge2BeO14 (A=Pr, Nd, Sm, Eu)belongingtothisclassbysubstitutionofBe2+inthe2dtetrahedralsite(Dsite).Thesubstitutionleadstoadecreaseinratioofmagneticiontogalliumfrom3:5to1:1andreducesthestabilityofgarnetstructure.Thesecompoundswerecharacterizedbyx-raydiffraction,magnetization,magnetic susceptibility, heat capacity, muon spin resonance and neutron scatteringmeasurements. Unique ground state of Nd3Ga3Ge2BeO14 was realized using the neutronscatteringmeasurements.

PosterNumber:21

FourPointProbeMeasurementsofSiliconMicrowiresPresentedby:JordanEngelUndergraduateStudentattheUniversityofManitoba,DepartmentofElectricalandComputerEngineeringAdvisor(s):DOliverCo-Author(s):AshishKumarResearchArea(s):CrystallineMaterialsandNanostructuresAProposedsolarwater-splittingdeviceuseslighttogeneratehydrogenfuelusingdopedsiliconmicrowires.Theelectricalbehaviorofthemicrowiresaffecttheoverallefficiencyofthedevice.Pressurized contacts using tungsten probes have already been shown to exhibit ohmicbehaviourandcanbeusedtomakeelectricalmeasurementsonmicrowiresbydrivingcurrentandsensingvoltagewithtwoprobes.Theseohmiccontactsaremadebyslowly increasingthecontact pressure until linear ohmic behaviour is observed in current-voltagemeasurements.Resistancemustbemeasuredforseveraldifferentprobespacingstoeliminatetheeffectofthecontact resistance on themeasurements. High pressure contacts often causewires to breakpart way through a measurement set, making two point measurement a time consumingprocess that requires expertise. A four point probe technique has been developed as analternativemethodformeasuringtheelectricalpropertiesanddopingconcentrationsofsiliconmicrowires. The four point technique significantly reduces the required contact pressure byusing low current sensing probes to measure the voltage, while driving the current with aseparatepairofprobes.Fourpointprobeelectricalmeasurementsonsiliconmicrowireshavebeentestedandcomparedwithtwopointprobemeasurementsandhavebeenshowntobeaneffectivealternativetotheoriginaltwopointmethod.

PosterNumber:22

Engineeringtheheart:Evaluationofconductivenanomaterialsforimprovingimplantintegrationandcardiacfunction

Presentedby:MohammadAliDarabiPhDCandidateattheUniversityofManitoba,DepartmentofMechanicalEngineeringAdvisor(s):MalcolmXingCo-Author(s):JinZhou,ChangyongWang,MalcolmXingResearchArea(s):CrystallineMaterialsandNanostructuresEngineering cardiac tissues in vitro offers new perspectives for the therapy of myocardialinfarction (MI) (1). The Engineered cardiac tissues (ECTs) exert beneficial effects on heartfunctionafterimplantation;however,thetherapeuticefficacyingeneralisrestrictedtoinhibitfurtherpathologicaldeteriorationofinfarctmyocardiumwithoutexpectedcompletereversalofmyocardial dysfunction (2). The biomaterial scaffold is the main component of engineeredcardiac tissues. It has been demonstrated that carbon nanotubes (CNTs) can improve theviability and proliferation of cardiomyocytes and promote their electrophysiologicalmaturation.Given thatgelatin isakindofbiocompatiblematerialsderived fromextracellularmatrix,ithasbeenreportedthatCNTs-incorporatedgelatinmethacrylate(CNTGelMA)hydrogelthinfilmcanbeusedtoengineer2Dcardiacpatches.Nevertheless,itremainstobeelucidatedthatwhethercardiacpatchesbasedonCNTcompositescanexertbeneficialeffectsontheheartfunctionaftermyocardial infarction. In this study,wehypothesized that singlewalledcarbonnanotubes (SWNT)/gelatin composite scaffolds can be used to fabricateECTs with strongcontractileandelectricalproperties,promotetherepairefficacyofECTstoinfarctmyocardium,and enhance the integration between ECTs and hostmyocardium. Herewe demonstrated aparadigm to construct ECTs for cardiac repair using conductive nanomaterials. SWNTs wereincorporated into gelatin hydrogel scaffolds to construct three-dimensional ECTs. Thefunctionalmeasurements showed thatSWNTswereessential to improve theperformanceofECTsininhibitingpathologicaldeteriorationofmyocardium.

PosterNumber:23

TheEffectsofAlcoholonthePrematureRuptureofPETProstheticGraftMaterials

Presentedby:CraigLeungUndergraduateStudentattheUniversityOfManitoba,DepartmentofBiosystemsEngineeringAdvisor(s):MRahmanResearchArea(s):CrystallineMaterialsandNanostructuresProsthetic graft implants are vital to themedical field. These grafts can be used to preventdeathandprolonghumanlife.Itisimportantthatthesegraftsfunctionproperlybecausetheytransportoneofthemostimportantfluidsinthehumanbody,blood.However,about25%and4%prostheticgraftfailuresoccurredduetothemechanicalbreakdownandbacterialinfectionrespectively.Prematureruptureofgraftscanleadtointernalbleedingandinsomecasesevendeath.Prosthetic grafts arenot standardized,however inCanada thegrafts are regulatedbythe Canadian Medical Device Regulations under the Food and Drug Acts. Prosthetic graftmanufacturers have the burden to decide whether their grafts are in good standing. In thecurrent research an investigation has been conducted under accelerated physiologicalconditionsinaqueousandalcoholicalkalinemediatofindsurfaceabrasiononprostheticgraftmaterialsthatmayleadtoprematurerupture.Thishasbeenconductedbyprestressingfabricsamplesandapplyingalcoholicandaqueousalkalinetreatmentsinaninvitrosetting.Fromthisinvitro testing, surfaceabrasionwas identifiedusingscanningelectronmicroscopy.Cracking,dentsanddeformitiesonthesurfaceofthefabricfibershavebeenobserved.However,itwasobserved that under identical conditions, pre-stressed samples in alcoholic alkaline solutionexperienced more severe surface abrasion than aqueous alkaline condition. The researchspeculated that the surgeons should restrict the patient’s intake of alcohol while prostheticgraftsareimplanted.

PosterNumber:24

OptimizingthemagnetismofFeCousingsizeandsilicacoatingtoforminterfacialmetalsilicates

Presentedby:KellyNewmanMScCandidateattheUniversityofManitoba,DepartmentofPhysicsandAstronomyAdvisor(s):J.vanLieropCo-Author(s):R.Desautels,M.Rowe,J.vanLieropResearchArea(s):CrystallineMaterialsandNanostructuresSoftferromagneticmaterialsareidealforapplicationssuchastransformerandinductorcoresdue to their low hysteretic losses and high saturationmagnetization. The iron cobalt (FeCo)system exhibits low coercivity and high saturationmagnetization and has the added benefitthat it is free of rare-earth elements,which aremore expensive and subject to supply chainconstraints. FeCo nanoparticles have been synthesized via a scalablemetal halide reduction,producing nanoparticles that have 4 nm diameters, determined via transmission electronmicroscopyimageanalysis.The4nmparticleswerethencoatedinsilica(SiO2)orannealedtohavediametersof25nm(confirmedviascanningelectronmicroscopyimageanalysisandx-raydiffraction (XRD) pattern refinement). These larger particles were also coated in silica. Allsystemswerecharacterizedbyvarioustechniquesincluding57FeMössbauerspectroscopy,XRD,AC andDC susceptibilitymeasurements, and hysteresis loops to determine the relationshipsbetweenthemagnetism,andthemicrostructureandcomposition.Annealingthe4nmparticlestoget the25nmparticlesprovides thebenefitofabulk-likestructureandorder resulting inhigher saturation magnetization, while still keeping the high surface to core atom ratiocharacteristicofnanoscalesystems.The25nmparticleshavealargersaturationmagnetizationatalltemperaturescomparedtothe4nmparticlesinboththecoatedanduncoatedsystems.Coating the particles can inhibit particle growth and encourage beneficial interfacial effectssuch as spontaneous metal silicate formation leading to higher saturation magnetization.MössbauerspectroscopyrevealsmorethanonemagneticenvironmentattheFenucleusofallFeCo/SiO2nanoparticles,indicativeofFe-silicateformation.

PosterNumber:25

InteractionofGoldNanoparticleswithProteinStudiedbyAtomisticSimulations

Presentedby:AoranWeiMScCandidateattheUniversityofManitoba,DepartmentofMechanicalEngineeringAdvisor(s):CDengCo-Author(s):ChuangDeng(supervisor)ResearchArea(s):HighPerformanceComputingAunanoparticleshavebeenusedforbiomedicalapplicationsince1970s.However,thetoxicityof them has become a rising issue, leading to an urgent need to understand themolecularmechanisms of the interaction between gold nanopartilcles and biological system, such asproteins.Self-assembledmonolayers(SAMs)oforganicthiolsonAusurfaceareexcellentmodelsystems to study the interactions of Au nanoparticle and proteins. In this paper, moleculardynamicssimulationofanall-atommodelhasbeenusedtostudythestructuralpropertiesofself-assembled alkanethiol monolayers with different chain lengths chemisorbed on the Au(111), (110), and (100) surfaces . The interaction between Au-S was modeled using Morsepotential,while fortheAu-Au interactions,anembedded-atom(EAM)methodwasused.Theadsorption of protein on SAMs with different chain lengths and terminals has also beeninvestigated.WeshowthatthearrangementofalkanethiolchainsonAu largelyreliesontheatomicpackingofAusurface.Inparticular,itisfoundthattheSAMlayerofalkanethiolchainsforms a well-ordered (√3x√3) R30° triangular lattice on Au (111) surface at 300K, which isconsistentwith the experimental results. Furthermore, the adsorption of protein varieswiththe composition and the lengthof themonolayer, e.g., the carboxyl group-terminated SAMsaremoreeffectivetoabsorbproteincomparedwiththemethyl-terminatedSAMs.

PosterNumber:26

CanComputationalParametersBeCorrelatedtoExperimentalEfficienciesofDyeSensitizedSolarCells?

Presentedby:JefferyPerkinsMScCandidateattheUniversityofManitoba,DepartmentofChemistryAdvisor(s):GSchreckenbachCo-Author(s):JefferyPerkins,GeorgSchreckenbachResearchArea(s):HighPerformanceComputingInterestinDyeSensitizedSolarCellshasbeenincreasingsincetheirintroductionbyGrӓtzelandO'Reganintheearly90's.Thisinteresthasprimarilybeendrivenbytheprospectofcheapandflexibledeviceswhichshouldbeabletoreachgridparitywithrelativeease.However,therearestillmajor challenges to bemet beforewide spread usage can be achieved. Among these isfinding better and/or cheaper dye molecules, preferably using easily obtained organicmolecules, and first row transition metals. In this work we have looked at variouscomputationalparametersdiscussedintheliterature,andcomparethemtoexperimentaldataforasetoffiftyorganicdyes,lookingforwhichparameterscanbeusedtojudgetheusefulnessofaproposeddyemolecule.Initialresultsforalargesetofdyesshowedveryweakcorrelationsinallparameters,howeversplittingthedyesintosetsrelatedbymolecularstructuresandcellconstruction has givenmuch stronger correlations. Leading us to the conclusion that care isneededwhencomparisonbetweendifferentdyemolecules,andcellcomponents.

PosterNumber:27

computationalscreeningofpotentialsingletfissionmoleculesPresentedby:GurpreetKourMScCandidateattheUniversityofManitoba,DepartmentofChemistryAdvisor(s):HGSchreckenbachCo-Author(s):JefferyPerkinsResearchArea(s):HighPerformanceComputingGlobalwarmingconcernsandenergysecurityhavemadesolarenergyconversionanimportantsubjectfromsociety'spointofview.Moreefficientsolarcellswould leadtowideruseofthiscleanenergysource.Aquantumprocesscalledsingletfissioncouldboostsolarcellefficiencybyharnessing inaccessible parts of the solar spectrum. One strategy to improve solar-cellefficiency is to generate two excited electrons from just one photon through singlet fission,which is the conversion of a singlet (S1) into two triplet (T1) excitons. One general designprincipleisthattheenergyof2×T1mustbeequaltoorlessthanthatofS1thatis,2E[T1]≤E[S1].Underthiscondition,thecorrelatedtripletpaircanrelaxtotwotripletsefficiently,whichleadstoahighsinglet-fissionefficiency.Alargenumberofpotentiallyfavourablestructureshasbeenexaminedbythetime-dependentdensityfunctionaltheorymethodtobuilda`library'ofpromising candidates for SF applications. Several likely candidates have been identified forexperimentalexamination.

PosterNumber:28

ISOTHERMALOXIDATIONCOMPARISONOFTHREENi-BASEDSUPERALLOYSPresentedby:MallikarjunaHeggadadevanapuraThammaiahMScCandidateattheUniversityofManitoba,DepartmentofMechanicalEngineeringAdvisor(s):W.F.Caley,N.L.RichardsCo-Author(s):Dr.W.F.CaleyandDr.N.L.RichardsResearchArea(s):HighTemperatureAerospaceMaterialsNi-based superalloys are used for high temperature components of gas turbines in bothindustrial and aerospace applications due to their ability to maintain dimensional stabilityunder conditions of high stress and strain. The oxidation resistance of these alloys oftendictatestheirservicelifetime.Inthisstudy,threeNi-basedsuperalloys,namelypolycrystallinecast IN738LC, single-crystal N5 and a ternary Ni-Fe-Cr (TAS) powder metallurgy alloys wereexaminedforrelativeoxidationresistanceinstaticairat900°Catdifferenttimesupto1000h.Basedonamicrostructuralanalysis,IN738LCexhibitedacontinuousdenseouterscaleofCr2O3anddiscontinuous inner scaleof Al2O3,whereasN5andTAS showedadenseouter scaleofAl2O3alone.Toexplain these results, theoxidation rateconstant,kpwascalculated foreach

alloyandfoundtobe;kp=2.79x10-6mg2.cm-4.s-1forIN738LC,kp=1.42x10-7mg2.cm-4.s-1forN5andkp=1.62x10-7mg2.cm-4.s-1forTAS.Theseresults,suggestthat,theN5andTASalloysaremoreoxidationresistantthantheIN738LCundertheseconditions.

PosterNumber:29

Influenceofliquid-statediffusiononmicrostructureofTLPjointbetweendissimilarsinglecrystalsuperalloyswithdifferentorientations.

Presentedby:OluwadamilolaOlatunjiMScCandidateattheUniversityofManitoba,DepartmentofMechanicalEngineeringAdvisor(s):M.C.Chaturvedi,O.A.OjoCo-Author(s):O.AOjoandM.CChaturvediResearchArea(s):HighTemperatureAerospaceMaterialsTransient liquid phase (TLP) bonding technique has proved to be a preferred technique forjoining extremely difficult-to-weld advanced materials, including similar and dissimilaraerospace superalloys. In the use of this technique to join dissimilar materials, liquid-statediffusioncanoccur,butitsinfluenceisusuallyignoredsinceitisgenerallyassumedthattheTLPbondingprocess isentirely controlledby solid-statediffusion.However, in thispresentwork,theeffectofliquid-statediffusiononthemicrostructureofajointproducedbyTLPbondingofdissimilar single crystal (SX) superalloys is investigated. The results show that liquid-statediffusioncanindeedhavesignificanteffectonTLPjointmicrostructure.InthecaseofbondingofdissimilarSXmaterialswithdifferentorientation,theoccurrenceofliquid-statediffusioncanproduceaSXjointthathasamatchingorientationwithoneoftheSXsubstrates,insteadofabi-crystal joint.ThisformationofaSX joint,whichcannotbeproducedexclusivelybysolid-statediffusion,hasnotbeenpreviouslyreportedintheliterature.

PosterNumber:30

AnalysisofNbSegregationEffectsonGammaPrimePrecipitationBehaviourofATI718PlusSuperalloyWeld

Presentedby:GBENGAASALAPhDCandidateattheUniversityofManitoba,DepartmentofMechanicalEngineeringAdvisor(s):O.AOjo,J.AnderssonCo-Author(s):Dr.O.A.OjoandJ.AnderssonResearchArea(s):HighTemperatureAerospaceMaterialsThe effect of elemental micro-segregation on the precipitation behaviour of the mainstrengthenphase,γ’precipitates,intherecentlydevelopednickel-basedsuperalloyATI718PlusafterTungstenInertGas(TIG)weldingandpost-weldheattreatmenthasbeenstudied.Similarto its baseline superalloy, IN718, elemental micro-segregation induced Laves phase andMCtype carbide particles were observed in the interdendritic regions of the fusion zone.Theoretical thermodynamic calculations were performed to study the influence of Nbsegregation on both the kinetics and extent of γ’’ precipitation during post-weld heattreatment.IncontrasttoIN718whereNbsegregationinthefusionzoneduringweldingaffectsthe extent of γ’ precipitation, it is found that in the newly developed ATI 718 plus, it is theprecipitation kinetics and not the extent of γ’ precipitation that is affected by the micro-segregationofNb.Thetheoreticalpredictionisconfirmedbyexperimentalobservations.

PosterNumber:31

NovelStructuralCeramicsbyMicrostructureDesignPresentedby:JaredSteenUndergraduateStudentattheUniversityofNorthDakota,DepartmentofMechanicalEngineeringAdvisor(s):SGuptaCo-Author(s):A.Stoker,W.Steidl,Q.Tran,E.Downward,T.Gorron,J.NelsonResearchArea(s):HighTemperatureAerospaceMaterialsMn+1AXn (MAX) phases (over 60+ phases) are thermodynamically stable nanolaminatesdisplaying unusual, and sometimes unique, properties. These phases possess a Mn+1AXnchemistry,wherenis1,2,or3,Misanearlytransitionmetalelement,AisanA-groupelement,andX isCorN.TheMAXphasesarehighlydamagetolerant, thermalshockresistant, readilymachinable,andwithVickershardnessvaluesof2-8GPa,areanomalouslysoftfortransitionmetalcarbidesandnitrides.Inthisposter,wewillpresentsomeoftherecentresearchstudiesonthedevelopmentofmultilayeredceramicsbasedsystems.

PosterNumber:32

TheUseofSynchrotronX-raysandUltrasonicsforInvestigatingtheBubbleSizeDistributionandItsEvolutioninDough

Presentedby:AnatoliyStrybulevychResearcherattheUniversityofManitoba,DepartmentofFoodScienceAdvisor(s):MScanlon,JPageCo-Author(s):FilizKoksel,SerdarAritan,ValentinLeroy,JohnH.Page,MartinG.ScanlonResearchArea(s):MechanicsofMaterialsandStructures,SoftandDisorderedMaterialsUnderstandingmechanismsofaerationofdoughduringmixingandhowtheaeratedstructureof dough evolves during breadmaking are critical for attaining a desirable bread crumbstructure. X-rays from a synchrotron source (Biomedical Imaging and Therapy beamline,Canadian Light Source) and ultrasonic transmission and reflection techniques wereindependently but simultaneously used to characterize the bubble size distribution and itsevolution in nonyeasted dough subsamples as a function of time after mixing. The timedependent series of discrete bubble size distributionswere extracted from the X-ray imagesusingimageanalysissoftwareandwerefedtoanultrasonicmodelforpredictionsofultrasonicphasevelocityandattenuationcoefficient.Thesepredictionsofphasevelocityandattenuationcoefficient derived from X-ray images exhibited frequency-dependent peaks that arecharacteristicofbubbleresonance,asexpectedfromtheultrasonicmodel.Furthermore,asthebubble size distribution changed as a function of time after mixing, the ultrasonic modelqualitativelyfollowedthechangesintheexperimentalvelocityandattenuationcoefficientthataccompanied changes in dough's bubbly structure. Our results point to the capability of theultrasonictechniqueasatooltononinvasivelymonitorthedynamicchangesarisingfromthediffusively driven evolution of bubble sizes during breadmaking with the potential fordeterminingthebubblesizedistributionindough.

PosterNumber:33

CharacterizingSterilizationEffectsonMaterialStrengthof3D-PrintedBiocompatiblePlastics

Presentedby:Emil-PeterSosnowskiMScCandidateattheUniversityofManitoba,DepartmentofBiosystemsEngineeringAdvisor(s):J.MorrisonCo-Author(s):J.Morrison,T.Gascoyne,M.PetrakResearchArea(s):MechanicsofMaterialsandStructures,SoftandDisorderedMaterialsTheuseof3D-printingofpolymerstocreatecustombiomedical implantshasthepotentialtoenable small companies to produce high-quality products. However the low-temperaturenatureoffusingpolymerfilamentmeansthatpost-productionsterilizationmustoccuratalowtemperature.ThisstudycharacterizestheeffectsofhydrogenperoxidevapoursterilizationbyaSTERIS Amsco V-PRO maX sterilizer on ASTM-compliant tensile samples of polycarbonate,polycaprolactone, and polylactic acid. Sterilization effects on the Young’s modulus, yieldstrength,andultimatetensilestrengthoftheplasticswereestablishedagainstcontrolsamples.Statisticallysignificantdecreasesinelasticitywerefoundinallthreematerials.Bothpolylacticacid and polycaprolactone samples experienced increases in physical size as a result ofsterilzation. These findings demonstrate that polylactic acid and polycarbonate 3D printedmedicaldevicessterilizedthroughthismethodmustbedesignedinordertoaccommodateforanychangestothemechanicalpropertiesthatmayoccurasaresultofsterilization,andthatpolycaprolactonemedicaldevicesmayhavetobesterilizedthroughothermeans.

PosterNumber:34

EstimationofIntracellularIonConcentrationsandCytoplasmConductivityforCHOcells

Presentedby:AzitaFazelkhahPhDCandidateattheUniversityofManitoba,DepartmentofElectricalandComputerEngineeringAdvisor(s):Dr.ThomsonResearchArea(s):ComplexNaturalSystemsCells are dynamic electronic materials that change electronic state in response toenvironmentalpressures.Therehavebeenmanydemonstrationsthatdielectricchangesoccurin cells thatare coincidentwith importantphysiological changes suchasduringprogrammedcelldeath(apoptosis).Thechangeincellphysiologicalstateisaccompaniedwiththechangeincelldielectricproperties. Inourgroup,weuseDEPcytometer todetectapoptosis inChineseHamster Ovary (CHO) cells through the change in conductivity due to change in ionconcentrations and followed their transition from a viable to non-viable state. There are noexisting models which can link physiological state of the cells to its dielectric properties.Therefore, to have a better understanding of experimental data and its relationship withphysiological state of the cell, in this work we did some theoretical calculation to estimateintracellular ion concentrations for CHO cells and used these values to estimate theconductivity of the cytoplasm.The estimated cytoplasm conductivity based on the appliedtheory is in agreement with the experimental values. The estimated cytoplasm conductivitychangesfrom0.419S/mto0.127S/mastheviablecellsundergoapoptosiswhichfollowsourexperimentalresults.Themeasuredcytoplasmconductivityforviableandnon-viableCHOcellsisabout0.42S/mand0.1S/m,respectively.

PosterNumber:35

PolymerElectrolytePotentiometricVolatileSensorPresentedby:BoWoodsMScCandidateattheUniversityofManitoba,DepartmentofElectricalandComputerEngineeringAdvisor(s):GBridgesCo-Author(s):R.Raju,S.BhadraandG.E.BridgesResearchArea(s):MEMS/MicrofluidicSystemsAmmoniagasiscommonlyfoundinenvironmentswherewastesareexcretedandisimportantto monitor since concentration levels above 25ppm are considered unsafe for long-termexposure.Wepresenta solidpolymerelectrolytebasedpHsensitivepassivewirelessvolatilesensor.ThesensoriscomposedofaMMOworkingelectrode,anAg/AgClreferenceelectrodeandamorphoushydrogelsolidelectrolyte[S.Bhadra,et.al.,SensorsandActuatorsB:Chemical,v. 209, 2015]. The electrolyte is encapsulated with a gas-permeable membrane. A volatileanalyte in the sensing environment, that is permeable to themembrane, is absorbedby thehydrogel and induces an electrochemical potential at the MMO electrode. This potential,characterizedbytheacidityorbasicityoftheanalyte, isapplieddirectlytoavoltagesensitiveLC-tankcircuit.Theshiftintheresonantfrequencyofthecircuitisdetectedremotelythroughinductive coupling and is a direct indicator of the generated potential, and thus volatileconcentration.Wedemonstrate abio-compatibledesignof the sensor the sizeof apostage-stamp(2cmx2cm).Potentialapplicationisinnon-invasivefoodspoilagedetectionandhealthmonitoringwhereacidicandbasicvolatilesactasindicators.

PosterNumber:36

DesignandFabricationofAMicromachinedLowVoltageElectrostaticActuatedDeformableMirrorSystem

Presentedby:YuZhouPhDCandidateattheUniversityofManitoba,DepartmentofElectricalandComputerEngineeringAdvisor(s):CShafaiCo-Author(s):Dr.CyrusShafaiResearchArea(s):MEMS/MicrofluidicSystemsAdaptiveOptics (AO)has contributedgreatly to theprogressof theobservational astronomyeversinceitsfirstsuccessfulapplicationin1989.Nowadays,mostoftheobservatorieshaveAOsystemasstandardfacility.WithinanAOsystem,thedeformablemirror(DM)isemployedtocorrect and compensate the atmospheric distortion of the wavefront of light. Despite of itssuccessfulness,mostoftheavailableDMsystemsrequirehundredsofvoltsofdrivingvoltage,which not only greatly impedes its compatibility to the IC system, but leads to the need ofcoolingsystemaswell. Inthisposter,weproposeamicromachinedDMsystembasedonthebulkmicromachiningtechniquewithanewdesignofelectrostaticactuator.Withthisspecificactuatordesign, themirror isdesignedtoachieveadecentstroke (~7µm)withareasonableresonantfrequency(>1kHz)andadrivingvoltagesmallerthan30V,whichisfullycompatiblewithexistingIC.

PosterNumber:37

DevelopmentofaNovelMEMSBasedHorseshoeshapedLorentzActuatorArrayforAdaptiveOptics

Presentedby:ByoungyoulParkPhDCandidateattheUniversityofManitoba,DepartmentofElectricalandComputerEngineeringAdvisor(s):C.ShafaiCo-Author(s):DwayneChruschandCyrusShafaiResearchArea(s):MEMS/MicrofluidicSystemsThispaperpresentsthedesignandtestingresultofahorseshoeshapedLorentzactuatorarrayforadaptiveoptics;thatwassuccessfullyfabricatedusingabulkmicromachiningprocess.Theactuated by Lorentz force that capable of lowering the operation current (1 to 10mA) andvoltage (less than 1 V) with bi-directional motion compare to an electrostatic actuator. Theactuatorconsistsoftwocrystallinesilicon(c-Si)twoloopsserpentineflexuresontheeitherendof a25µm thickand rigidc-Si cross-bar. These serpentine flexuresprovide currentandheattransportpathway.SimulationresultsbyusingCOMSOLMultiphysicssoftwareshow~0.2N/mspringconstantofserpentineflexurewith5µmmembranemirrorisneededtohave20to30%inter-actuatorcoupling.Thetotalrequiredforcetoget±5µmdeformationofthemembraneisaround 12 µN. Following this, experimental testing of the actuators was undertaken, withdemonstrated actuatormotion up to 50 µm agreeing with the simulated performance. ThisMEMS-based Lorentz actuator array promises a low power consumption and low voltagesystem for adaptive optics micro-mirror applications, with demonstrated potential for highfabricationyield.

PosterNumber:38

ButterflyBasedMEMSDCelectricfieldsensorwithmodulatedsensitivityPresentedby:SampathLiyanageMScCandidateattheUniversityofManitoba,DepartmentofElectricalandComputerEngineeringAdvisor(s):C.ShafaiCo-Author(s):TaoChenResearchArea(s):MEMS/MicrofluidicSystemsDCelectricfiledmeasurementsareimportantinmanyindustries.Inpowerindustryithasbeenusedtomeasurevoltageinthepowerlinesandtestingandidentifyingdefectiveinsulators.Inatmospheric science electric fieldmeasurements are used to predictweather conditions likelightning. In the transportation industryeclectic filedmeasurementhasbeenusedto identifydangerous condition when transporting chemical goods.Traditionally, electric filed mills areusedtomeasureDCelectricfiledmeasurements.Butthisdevicehasdrawbackslikebulkiness,highpowerconsumption,frequentmaintenance.RecentyearsdifferentMEMSdcelectricfiledsensor were developed and deflection was measured by a laser position detection system.However,itfacedpracticalissueswhenmakingmeasurementsintheindustrysuchasstabilityand size.In thiswork, itwas simulated severalMEMS sensor designs in different frequenciesfrom500Hzto2kHzwithbutterflymotiontoincreasethesensitivitywithapplyingpositiveandnegativevoltagestothemembraneatthesametime.Modulationoftheincidentelectricfieldwithabiasvoltageonthesensingmembraneisusedtogivethesensorawidemeasurementrange,fromsub-1V/mtoMV/m.Thesensoroperatesbymonitoringmembranedisplacementdue to incident electric fields. Unlike field mills, this sensor does not have rotating parts,avoidingassociatedwearandmaintenanceissues.Highsensitivity isachievedbyusinga laserpositionmonitoring system. Compact electronic basedmeasurement system is developed totakeeasymeasurements.

PosterNumber:39

ResonanceBasedMEMSMagneticFieldSensorPresentedby:MeitingLiMScCandidateattheUniversityofManitoba,DepartmentofElectricalandComputerEngineeringAdvisor(s):C.ShafaiCo-Author(s):ByoungyoulPark,SampathLiyanage,CyrusShafaiResearchArea(s):MEMS/MicrofluidicSystems AresonancebasedMEMSmagneticfieldsensorispresented.ALorentzforceactuatedMEMS micromirror is used as the resonator. An AC current flows across the resonator,generating a Lorentz force at themechanical frequency of the resonator itself. The periodictorsionalmotionofthemicromirrorisdetectedwithaquad-cellphotodetectorandprocessedwithelectronics.Thismagnetic field sensorpresentsa linear responsebetween the resonantrotational angle and the magnetic field strength. This magnetic field sensor presents aresolution of 0.4 nT at 50mArms bias current, and operation at atmospheric pressure. Atdifferent levelofbiascurrent, resonanceMEMSLorentzmagnetic fieldsensorscanwork inawiderangeofmeasurement,fromnTtoT.

PosterNumber:40

AninfraredspectrometerbasedonaMEMSFresnelzoneplateformeasuringincipientfaultgasesinhighvoltageequipment

Presentedby:PawelGlowackiMScCandidateattheUniversityofManitoba,DepartmentofElectricalandComputerEngineeringAdvisor(s):CShafaiCo-Author(s):ResearchArea(s):PhotonicandPhononicInteractions,MEMS/MicrofluidicSystemsDissolvedgasanalysis(DGA)isamethodformeasuringincipientgasesinoilimpregnatedhighvoltage equipment. Currently there exist a number of methods for performing this analysisincluding optical techniques such as photoacoustic spectroscopy and FTIR. In this work, aspectroscopictechniquebasedontheapplicationofaMEMSFresnelzoneplateforperformingDGAispresented.Thezoneplateisdesignedtofunctionasatemporalfilterwithafocallengthof20mm,adesignwavelengthof3.045um,andaspectralbandwidthof5nm.SimulationresultsinMATLABhaveshownthatbyadjustingthefocallengthofthelens,theabsorptionprofilesofmost hydrocarbon incipient fault gases can be detected for a single design wavelength.Simulation results have also shown how various parameters of the lens including SNR,transmittance, and spectralbandwidth changewith respect to thenumberof zones inplate,thedesignfocallengthandwavelength,aswellastheratioofopentoopaquespaceinthelens.ThecurrentworkbeingperformedisbuildingthelensusingMEMSfabricationtechniques.

PosterNumber:41

DesignandfabricationofSi/SiO2distributedBraggreflectorsbyreactiveRFmagnetronsputtering

Presentedby:ElnazAfsharipourPhDCandidateattheUniversityofManitoba,DepartmentofElectricalandComputerEngineeringAdvisor(s):C.SShafaiCo-Author(s):CyrusShafaiResearchArea(s):PhotonicandPhononicInteractions,MEMS/MicrofluidicSystemsIn thiswork,highly reflectingDistributedBraggReflectors (DBR) composedofhigh refractiveindex amorphous silicon (n=3.5) and low refractive index silicon dioxide (n=1.47) films aredesignedand fabricated. Fivepairs of quarter-wavelength-thick layers aredepositedonbothglassandsiliconsubstrates.Siliconandsilicondioxidelayersarefabricatedbyradiofrequencymagnetron sputtering and reactive-sputtering of silicon targetwith oxygen gas, respectively.Thepresentedmethodisreproducibleandhastheadvantagesof low-temperatureandsinglerundeposition.Themaximumcontrastbetweentherefractiveindiceswasachievedbytailoringthesputteringparameters.Theeffectofoxygenandargongasflowrates,aswellasdepositionpressureontherefractive indexandtransmissionofdepositedSiO2films, isalsostudied.TheVIS-IRspectroscopyandellipsometrytechniquesareutilizedtoopticallyanalyzethestructure.Thetransmission,angledependentreflectionprofilesandphasechangeinducedbythinfilms,areinvestigated.DBRsexhibitedmorethan90%reflectanceinacenterwavelengthof640nmwhichmatchesthesimulations.

PosterNumber:42

VoltageControlofCavityMagnonPolaritonPresentedby:SandeepKaurMScCandidateattheUniversityofManitoba,DepartmentofPhysicsandAstronomyAdvisor(s):C.-MHuCo-Author(s):BimuYao,JinweiRao,YongshengGuiResearchArea(s):PhotonicandPhononicInteractionsActive voltage control of CavityMagnon Polariton (CMP) is demonstrated in themicrowavefrequencyregimeusingavaractorloadedsplitringresonatorcavityalongwithanYIGsphere.Traditionally,theCMPdispersionhasbeenstudiedbyusinganappliedmagneticfieldtotunetheresonanceresponseofYIGbecausethecavityhasafixedresonancefrequency.However,theresonanceresponseofourvaractor loadedsplitringresonatorcavitycanbecontinuouslyandaccuratelytunedbytuningthevoltagebiasappliedtothevaractor.Therefore,byusingthiscavity, the photon-magnon coupling between a cavity photon and an YIG magnon, whichcorrespondstothegenerationofCMPcanbestudiedbytuningtheappliedmagneticfieldaswell as the applied DC voltage. This planar, electrically tuneable cavity not only providesanother degree of freedom to study the CMP but can also be easily adapted to an on-chipdesignforcreatingnovelmicrowavedevicesthatutilizelight-matterinteractions.

PosterNumber:43

IndirectCouplingBetweenTwoCavityPhotonSystemsviaFerromagneticResonance

Presentedby:PaulHydePhDCandidateattheUniversityofManitoba,DepartmentofPhysicsandAstronomyAdvisor(s):C.-M.HuCo-Author(s):L.Bai,M.Harder,C.Match,andC.-M.HuResearchArea(s):PhotonicandPhononicInteractionsAlthough the field of quantum computing promises to be the next big leap in informationtechnology, designing systems that can incorporate quantumeffectswhile still being able totransmitandstoredatahasprovedchallenging.Thisismainlyduetothenaturalinstabilityofmost quantum systems. However, within the past few years quantum behaviour has beenproposedinmacro-sized(afewmm)ferromagnetic(FM)systemslockedinaresonatingmacro-state. These systems would use relatively stable FM macro-states to store quantuminformation, and transfer information using photons. Although many studies have beenperformed on energy transfer between FM systems facilitated by a single resonant photonstate,we insteaduseanadjustable cavity tobring twocavityphoton resonantmodes intoacoupledstatewithasingleFMsystem.Bycouplingthesethreesystemstogether,weobserveaclearincreaseintheamplitudeofthephotonsystemswhentheirresonantmodesarebroughtin-phasewith each other, evidence of energy transfer between them. Since photons cannotinteractwitheachother,thisenergytransfermustbebeingfacilitatedbytheFMsystemtheyarecoupledwith.Arelatedamplitudedecreaseisseenasthephotonstatesarebroughtpiout-of-phasewitheachother.Theseresults,thefirstofFMmediatedphotonenergytransfer,areverifiedbycomparisonwithathreecoupledoscillatormodelbasedonthephoton-FM-photonsystem.

PosterNumber:44

TheCoherenceofStrongSpin-PhotonCouplingPresentedby:MichaelHarderPhDCandidateattheUniversityofManitoba,DepartmentofPhysicsandAstronomyAdvisor(s):C.-M.HuCo-Author(s):LihuiBai,ChristopheMatch,JeskoSirker,Can-MingHuResearchArea(s):PhotonicandPhononicInteractionsUnderstanding and controlling light-matter interactions is the kernel ofmaterials science. Inthis direction, recent studies of strongly coupled spin-photon systems have revealedexceptionally longdephasingtimes,sparkingexcitementwithinthequantuminformationandspintronic communities. On one hand, such systems may represent the next generation ofhybridquantuminformationdevices,whileontheotherhand,fromaspintronicsperspective,the coherent nature of such spin-photon coupling opens the door to coherent spin currentcontrol.In this work we systematically study the transmission line shape of an yttrium-iron-garnet/microwavecavitysystem.Thelargespindensityandlowlossratesoftheferrimagneticinsulator YIG, togetherwith the high quality of ourmicrowave cavity, allow us to enter thestronglycoupledregime.Byperformingtwodimensionalfrequencyandfieldmeasurementsofthe microwave transmission, this spin-photon system can be fully characterized. Ourobservationsrevealnewlineshapesymmetrieswhicharerelatedtothephaseinformationofthe YIGmagnetization. To accurately describe these results we have built models based onharmonic coupling, electrodynamic phase correlation, and amicroscopic Hamiltonian, whichprovideinsightsintothenatureofthecoupling,andcanbeeasilygeneralizedtoothersystems.Therefore ourwork represents the first step towards a deeper experimental and theoreticalunderstandingofthecoherentnatureofstrongspin-photoncoupling,whichwillplayaroleinfuturequantuminformationandspintronictechnologies.

PosterNumber:45

Newluminescenttransitionmetald10complexessupportedbyphenanthridine-basedligands

Presentedby:IssiahLozadaUndergraduateStudentattheUniversityofManitoba,DepartmentofChemistryAdvisor(s):D.E.HerbertCo-Author(s):RajarshiMondal,PatrickGiesbrecht,andDavidHerbertResearchArea(s):PhotonicandPhononicInteractionsEver since the discovery of tris(2,2-bipyridyl)ruthenium(II), chemists havebeenpursuing newluminescentcoordinationcompoundswithgreaterchemicalstability,redoxandluminescence,excited state lifetime and reactivity.1 These compounds have been employed in differentluminescent technologies (e.g. smartphones),2 in bio-imaging,3 optical power limitingmaterials,4 and photochemical catalysis.5 As such, chemists have exploited, largely, theplatinum group metals, which have demonstrated outstanding and tunable photo- andelectroluminescence.6 These enhanced properties are consequences of the high spin-orbitcoupling of these metals. However, these metals can be costly due to their scarcity in theEarth’scrust,whichmightimpedethediscoveryanddesigningofnovelluminescentmaterials.It is therefore imperativetoemploycheaperandmoreabundantalternatives.Ourgroupare,therefore,pursuingd10 transitionmetalcomplexesasalternatives,particularly,copper(I)andzinc(II) metal ions. Apart from the lower costs of these compounds, various coordinationgeometries can be accessed that can be advantageous in designing complex molecularstructures.Inaddition,ligandscontainingphenanthridine(1)andavarietyofarylgroupsboundtonitrogenorphosphorousintheligand-backbonehavebeensynthesized,whichwillallowusto potentiallymodify the electronic structure of the complexes.MultinuclearNMRhas beenextensively used to characterize these novel ligands and complexes, and to determine theefficiencyoftheutilizedsyntheticmethods.Moreover,singlecrystalX-raydiffractionofthesecomplexes,whichprovedtobechallenging,hasbeencarriedouttostudytheirstructuresinthesolid state. Lastly,UV-Vis and cyclic voltammetry of the complexes havebeen carriedout tostudytheirelectronicstructureandwillbetiedtotheirobservedstructure.References:1 Campagna, S.; Puntoriero, F.; Nastasi, F.; Bergamini, G.; Balzani, V. Photochemistry and Photophysics ofCoordinationCompounds:Ruthernium. InTopics inCurrentChemistry.Balzani,V.;Campagna,S.,Eds.; Springer-Verlag:Berlin,2007;Vol.280,p119.2Yersin,H.andFinkenzeller,W.J.TripletEmittersforOrganicLight-EmittingDiodes:BasicProperties.InTripletEmittersforOrganicLight-EmittingDiodes:BasicProperties,inHighlyEfficientOLEDswithPhosphorescentMaterials.Yersin,H.,Ed.;Wiley-VCH:Verlag,2007;p1.3Coogan,M.LigandDesignind-Block Optical Imaging Agents and Sensors. In Ligand Design in Medicinal Inorganic Chemistry. Storr, T., Ed.;Wiley:Chichester,2014;pp81-108.4 Spangler,C.W. J.Mater.Chem.1999,9,2013-2020.5Ciesla,P.;Kocot,P;Mytych P.; Stasicka, Z. J. Mol. Catal. A 2004, 224, 17-33. 6 Murphy, L.; Williams, J.A.G. Luminescent PlatinumCompounds: FromMolecules to OLEDs. In Topics in Organometallic Chemistry. Bozec, H.L.; Guerchais, V., Eds.;Springer-Verlag:Berlin,2010;Vol.28,pp75-111.

PosterNumber:46

SuperdiffusiveSpinTransportPresentedby:MaximilianKiefer-EmmanouilidisMScCandidateattheUniversityofManitoba,DepartmentofPhysicsandAstronomyAdvisor(s):J.Sirker,S.EggertCo-Author(s):H.C.SchneiderResearchArea(s):QuantumMaterialsWesolvetransportequationsnumericallytodescribeultrafastdemagnetizationthroughspin-polarized excited electron superdiffusion in mono- and heterostructures. Thus we use asemiclassical approach that is specifically dedicated to capture the spin transport of laser-excited nonequilibrium electrons. As examples we solve the spin-dynamics for typicalmonostructures (Fe,Ni,Au), a ferromagnetic/nonmagnetic metallic junction (Fe/Au) and aferromagnetic/insulatorjunction(Ni/MgO).

PosterNumber:47

Iridium-silicidenanowiresonSi(110)surfacePresentedby:NuriOncelResearcherattheUniversityofNorthDakota,DepartmentofPhysicsandAstrophysicsAdvisor(s):Co-Author(s):RasikaN.MohottigeResearchArea(s):QuantumMaterials,CrystallineMaterialsandNanostructures,SurfacesandInterfacesAs continuousminiaturization challenges lithography techniques in electronics, self-assemblybased processes become more attractive. One particularly important self-assembledcomponent is metal-silicide nanowires. These nanowires can function as low-resistanceinterconnects, as fins in FinFETdevices and as nano-electrodes for attaching small electroniccomponentswithin an integrated circuit. It has already been shown that a variety ofmetalsform self-assembled silicide nanowires on the surface of flat and/or vicinal Si substrates. IncomparisontoSi(111)andSi(001)surfaces,Si(110)surfacehasreceivedrelativelylessattentionbecause the surface reconstruction is complicated and it is difficult to grow single largedomains. However, higher hole mobility in devices fabricated on Si(110) surface and thepossibility of employing self-assembled nanowires in various applications have recentlyincreasednumberofstudiesonthesesystems.Westudiedphysicalandelectronicpropertiesofiridium silicide nanowires grown on the Si(110) surface with the help of scanning tunnelingmicroscopyandspectroscopy.Thenanowiresgrowalong the [001]directionwithanaveragelengthofabout100nm.Theyhaveabandgapof~0.5eVandtheirelectronicpropertiesshowsimilaritieswiththeiridiumsilicideringclustersformedonIrmodifiedSi(111)surface.

PosterNumber:48

StructureandphaseseparationinborosilicateglassesPresentedby:ArunKrishnamurthyMScCandidateattheUniversityofManitoba,DepartmentofChemistryAdvisor(s):DrKroekerCo-Author(s):ScottKroeker;KirillLevinResearchArea(s):SoftandDisorderedMaterialsGlasseshaveuniquephysicalandchemicalpropertieswhichvaryasafunctionoftemperatureand chemical composition. Understanding these properties requires an accurate structuraldescriptionoftheglass.Theimportanceofbothmolecular-levelstructureandbulkmorphologydemand effective characterization across many length scales. We use a variety of essentialmethodstoprobekeyaspectsoftwoseriesofglasses.X-rayphotoelectronspectroscopy(XPS)isusedinanattempttodetermineandquantifytheboronandoxygenlocalenvironmentswithdifferentco-ordinationnumbersinbariumborosilicateglasses.Morecomplexalkaliborosilicateglassesaredesignedtomimicmaterialsfornuclearwastedisposal.Theseglassesarechemicallydurable and possess high waste loading capacity making them very attractive for storingradioactive nuclei which undergo long term decay. Some components that are present in atypicalhighlevelwaste(HLW)streamarenoteasilyincorporatedintotheglassstructure.Somefractionofmolybdenumtendstophase-separateascrystallinemolybdates,sequesteringalkalior alkaline-earth ions,making it challenging to study by a single technique.Weuse electronprobemicroanalysis(EPMA),laserablationinductivelycoupledplasmamassspectrometry(LA-ICP-MS),X-raydiffraction(XRD)andsolidstatenuclearmagneticresonance(ssNMR,23Naand133Cs) spectroscopy to characterize different phases produced under typical processingconditions. It is found that theadditionofCa to thebaseglassprevents formationofwater-soluble molybdate phases containing radioactive isotopes. Phase separation of thesemolybdatesalsodependsonmeltquenchrate.Basedontheseresults, theglasscompositionwillbefine-tunedtoincreasethethresholdlimitofwaste-loadingcapacity.

PosterNumber:49

PDMS-basedacousticimpedance-matchedmaterialinwaterPresentedby:Reine-MarieGuillermicPostdoctoralFellowattheUniversityofManitoba,DepartmentofPhysicsandAstronomyAdvisor(s):J.H.PageCo-Author(s):Reine-MarieGuillermic,AnatoliyStrybulevych&JohnH.PageResearchArea(s):SoftandDisorderedMaterials,CompositeMaterialSystemsHavingamaterial that ismatched inacoustic impedancewithwater canbeahugeasset formany underwater acoustic applications.We have created a compositematerial that has thesame longitudinal acoustic impedance as water using Polydimetylsiloxane (PDMS) and TiO2particles. The goal is to create an easy-to-handle soft material with a negligible acousticalreflectioncoefficientwithlowabsorptioninotherwordsamaterialthatwouldbeacousticallytransparentunderwater.TopredicttheconcentrationofparticlesneededinthePDMSmatrixto obtain impedancematching towater,we used a Coherent Potential Approximation (CPA)modelfordispersedparticlesinanelasticmatrix.Thismodelpredictstheshearandlongitudinalmoduliofthefinalcompositesystem.Wediscussthevalidityandlimitationofthemodelandshowexperimentallythatitispossibletoachieveperfectimpedancematchingforlongitudinalwavesbyaddingsubmicronparticlestoasoftsolid,herePDMS,andalsotomeasureitsshearmechanical properties. The composite material can be cured in a mold to achieve desiredsampleshapeinthesamewayaswithclassicPDMS,whichmakesitveryeasytohandleandtouse. This material, which prevents acoustical reflections, can be used as a cell or for wallsaroundasampletoallowthesample'sacousticalpropertiestobeprobed.Weplantousethismaterialtoimprovetheperformanceofbubblemetascreensforbroadbandsuperabsorptionofacousticwavesinwater.

PosterNumber:50

EffectsofingredientsandmixingontherheologicalpropertiesofbreaddoughPresentedby:XinyangSunPhDCandidateattheUniversityofManitoba,DepartmentofFoodScienceAdvisor(s):M.G.ScanlonCo-Author(s):XinyangSun,FilizKoksel,MartinG.Scanlon,MichaelT.NickersonResearchArea(s):SoftandDisorderedMaterialsFrom the materials point of view, bread dough is a viscoelastic system formed by mixingingredients (i.e., wheat flour, water and NaCl) to create a desirable structure with specificperformance attributes. The effects of ingredients and mixing time, separately, on doughrheologicalpropertieshavepreviouslybeenstudied.Buthowdoughrheologicalpropertiesareaffectedby the interactions of ingredients andmixing (i.e., optimal, under- andover-mixing)has not been reported yet. The objective of this researchwas to investigate the interactiveeffects of wheat cultivar, water concentration, NaCl concentration and mixing time on therheologicalpropertiesofdoughs.Resultsshowedthatdoughrheologicalpropertieswerebetterdiscriminatedaccording todifference inwheat flourattributesat the low-moistureandhigh-NaCl conditions.Theeffectofwateron theenergy input foroptimal-mixeddoughwasmorepronouncedathigh-NaClconditions,whereastheeffectofwaterondoughviscoelasticitywasmoresignificantatlow-NaClconditions.Accordingtochangesintheoptimummixingtimeandenergy input, the doughsmade from thewheat cultivars Pembina, Roblin andHarvestweremoretoleranttoNaClreduction.Fromrheologicalanalysesondoughelasticity,Roblindoughsprepared at optimal mixing and water addition were less responsive to NaCl changes. TheinteractionofmixingandNaClondoughviscoelasticitywasmoresignificantlyaffectedbyNaClat under-mixing conditions. In conclusion,wheat cultivar,water, NaCl andmixing time exertinteractive effects on the rheological properties of bread dough. Therefore, ingredients andmixingtimeneedtobetakenintoaccountformakingbreaddoughwithoptimalviscoelasticity.

PosterNumber:51

AnomalousDiffusionofUltrasoundinclose-packedSuspensionsofAluminumBeads

Presentedby:SébastienKerhervéPhDCandidateattheUniversityofManitoba,DepartmentofPhysicsandAstronomyAdvisor(s):J.H.PageCo-Author(s):S.O.Kerhervé,J.H.PageResearchArea(s):SoftandDisorderedMaterialsMeasurements of multiply-scattered wave transport allow the characterization ofheterogeneousmediaandmay reveal anomalouswaveproperties.Whenawavepropagatesthroughasufficientlydisorderedmedium,itwillundergomanyscatteringevents.Thismayleadto diffusive transport or even, in highly disordered media, to localized behaviour in whichtransportcomestoahalt.Thesetworegimescanbedistinguishedbymeasuringtheevolutionof thetransverse intensityprofilewhenpoint-likeultrasonicpulse is incidentontheoppositeside of a slab-shaped sample. In the case of diffusive propagation, the profile width growswithout limit as the square root of time, while for localized waves, the width reaches asaturationvalueatlongtimesduetothetrappingofthewavesinthemedium.In our experiment, the sample consists of aluminum beads randomly packed in silicone oil,creating a disordered two-component medium where diffusion was expected, based onpreviousworkwithglassbeadsuspensionsinwater.Contrarytoexpectations,wefindthatthetransverse width goes through a maximum as a function of time, and varies more slowlyafterwards. This novel behaviour may be due to the existence of two coupled modes ofpropagation: a fast diffusivemode travellingmainly through the liquid,with thepropagatingwavesbeingmultiplyscatteredoffthebeads,andaslowermodethatinvolvestransportviathebeadnetworkandisstronglyinfluencedbythebeadresonances.

PosterNumber:52

VitaminADeficiencyasaMurineModelofFetalAlcoholSpectrumDisorder(FASD):CharacterizationofFAS-LikeCraniofacialandNeurodevelopmental

Malformations.Presentedby:BerardinoPetrelliMScCandidateattheUniversityofManitoba,DepartmentofBiochemistryandMedicalGeneticsAdvisor(s):GHicksCo-Author(s):ResearchArea(s):SoftandDisorderedMaterialsFetal Alcohol Spectrum Disorder (FASD) is the most common cause of neurodevelopmentaldisordersinthewesternworld,affecting1-5%ofNorthAmericanchildren.IndividualswithFAShavecraniofacialmalformationsandneurodevelopmentaldeficits,includingcognitive,memoryand learning impairments.Wehypothesize thatacuteprenatal alcoholexposureoverwhelmsalcoholmetabolizing enzymes that normally also convert retinol (VitaminA) to retinoic acid;moreover, this reduction of retinoic acid levels during gastrulation drives themalformationsand deficits associated with FAS. To model the alcohol competitive inhibition in vivo wegenetically engineered a mouse expressing Cyp26A1-eGFP from the endogenous Goosecoid(Gsc)promoter.Cyp26A1biochemicallymimicsthereducedretinoicacidlevels induced by acute alcohol exposure and the Gsc promoter dictates a specific spatio-temporal expression of the Cyp26A1-eGFP cassette in Spemann'sOrganizer (at gastrulation).AnalysisofnewbornF1miceshows88%(n=15/17)ofmutantmiceassessedhadadiscernableFASphenotype,comparedwith100%ofwild-typemiceassessedasnormal(n=14/14).ScanningElectronMicroscopyanalysisfurtherquantifiedthecraniofacialmalformationsusingaphiltrumlength measurement ratio. Gsc:Cyp26A1 x RARE-LacZ reporter mice were next used todemonstrate a reduction in Rare-LacZ expression (retinoic acid activity) in the developingforebrainregionofGsc:Cyp26A1E8.5embryos.Takentogether,ourdatasupportstheroleofalcohol-inducedretinoicaciddeficiencyasanunderlyingetiologyofFAS.

PosterNumber:53

SEPARATIONOFFIBREANDSHIVESFROMDECORTICATEDFLAXPresentedby:SandeepThakurResearcherattheUniversityofManitoba,DepartmentofBiosystemsEngineeringAdvisor(s):YChen,JMorrisonCo-Author(s):YChenandJMorrisonResearchArea(s):SoftandDisorderedMaterials,CompositeMaterialSystemsDecorticated flaxcontains significantamountof shives,which limitsapplicationsof flax fiber.Separationofshivesfromthefiberisessentialtoimprovethequalityofflaxfiber.Theintentionof this study was to use pneumatic method for separation of flax fiber and shives. Forpneumaticmethod to be successful, differences between the terminal velocities of flax fiberandshiveparticleswere investigated.Measurementswereconductedon individual fiberandshive particles. Those particles were characterized in terms of width, length, andmass, andtheirterminalvelocitiesweremeasuredusingawindtunnel.Toimprovefiberquality,sortingmethodwasalsotestedforseparationofshortandlongfiber(longerfiberhashighermarketvalue).AgenericfiberSorterwasusedforthesortingtestswithtwotypesofdecorticatedflaxfibers as treatments: Grade 1 and Grade 2. Their initial fiber purities were 51% and 15%,respectively.TheoutputsoftheSorterwereanalyzedtodeterminethemachineyieldandfiberpurity. The results of the pneumatic tests showed that the length of fiber particles did notinfluencetheterminalvelocitiesoffiber.Forshives,theincreaseinmassandwidthshowedanincreasing trend in terminal velocity. The ranges of terminal velocities for shive and fiberparticleswere1.13to4.09ms-1and0.51to1.07ms-1,respectively,whichweresignificantlydifferent.Theresultsofthesortingtestsshowedthatthesortingmethodresultedinthefiberpurity of approximately 80% for Grade 1 and 66% for Grade 2, which were a significantimprovementwhencomparedtotheirinitialpurities.Thisstudydemonstratedthepotentialofthepneumaticandsortingmethodsforimprovingfiberquality.

PosterNumber:54

AttachingMixedMonolayersofvFc/MetoSiMicrowireArraysPresentedby:OnkarKangPostdoctoralFellowattheUniversityofManitoba,DepartmentofChemistryAdvisor(s):DHerbert,MFreundCo-Author(s):JaredBruce,PatrickGiesbrecht,DavidHerbert,MichaelFreundResearchArea(s):SurfacesandInterfacesA fully integrated, freestanding device for photoelectrochemical fuel generation will likelyrequirecovalentattachmentofcatalyststothesurfaceofthephotoelectrodes.Ferrocenehasbeenutilizedinthepastasamodelsystemformolecularcatalystintegrationonplanarsilicon;however,thesurfacestructureofhigh-aspectratiosiliconmicrowiresenvisionedforapotentialdevice presents potential challenges with respect to stability, characterization and masstransport. Attachment of vinylferrocene to Cl-terminated surfaces of silicon microwires wasperformed thermally. By varying the reaction time, solutions of vinylferrocene in di-n-butylether were employed to control the extent of functionalization. X-ray photoelectronspectroscopy (XPS) and electrochemistry were used to estimate the density and surfacecoverage of the siliconmicrowire arrayswith ferrocenyl groups,which could be controllablyvariedfrom1.23x10-11to4.60x10-10molcm-2or1to30%ofamonolayer.Subsequentback-fill of the remaining Si-Cl sites with methyl groups produced ferrocenyl-terminated surfacesthat showed unchanged cyclic voltammograms following two months in air, under ambientconditions,andrepeatedelectrochemicalcycling.

PosterNumber:55

ComparisonofFoulingMechanismsofFourNanofiltrationMembranes:OptimalMembraneSelectionforStephenfieldRegionalWTP,MB,Canada

Presentedby:IanMoranUndergraduateStudentattheUniversityofManitoba,DepartmentofCivilEngineeringAdvisor(s):BGorczycaCo-Author(s):Dr.BeataGorczycaResearchArea(s):SurfacesandInterfacesDualmembranefiltrationplants,incorporatingmicrofiltration(MF)andnanofiltration(NF)havebecome widely used in potable water treatment as a method that can meet increasinglystringent THMs standards. Due to the high soluble material content in Manitoba andsurroundingareas,amajorconcernforplantoptimizationisNFfouling.Overoperationaltime,thefoulantlayeractsasaninhibitorofpermeatefluxandcansignificantlydecreasemembraneelement longevity and increase plant operational cost. The extent of membrane fouling isdeterminedbythespecificinteractionbetweenthemembraneandsolublematerialinthefeedwater. A detailed understanding of NF fouling mechanisms is necessary to optimize plantoperation.Physicalandchemicalanalyseswerecarriedoutonfourdifferentmembranes(DOWFILMTECNF90-400/34i,DOWFILMTECNF270-400/34i,DOWFILMTECBW30XFR-400/34i,DOWFILMTEC XFRLE-400/34i) to determine the optimal membrane for installation in theStephenfield Regional WTP in southern Manitoba. Post-MF water from the StephenfieldRegional WTP was run in cross flow at 10bar (145psi) across each membrane at differentoperationaltimesteps(1,4,12,24,48hours).Virginmembranesurfaceroughnessappearstobe the governing factor for the degree andmechanism of fouling. Atomic forcemicroscopyshowed the initially rough NF90 and BW30 membranes experience a higher initial rate offoulingdue to thehigher surfacearea toattachand surface contours for solublematerial tograb. The non-fouling resistant NF90 and NF270 membranes experienced a flux restorationfrom fouling over time. This phenomenon is predicted to be the dual result of membranecompaction and scouring. The flattening process of membrane peaks pulls down theoverbearinglayeroffoulantcausinganincreaseinsurfaceroughnesswithgreatersusceptibilityto the effects of cross flow scouring. The BW30 and XLE, coated with a fouling-resistantpolyetherblockamidecompound,experiencedalesserdegreeoffouling.TheretainedmassoffoulantontheNF90wasthreetimesgreaterthantheothertestedmembranesduetothehighvirginmembranesurfaceroughnessandlackoffoulingresistantcoating.Thisunderstandingoffoulingmechanisms,aswellaspermeatequality,wasusedtoselecttheNF270astheoptimalelementforlongevityandoperationalcost.

PosterNumber:56

Core-shellnanoparticlemagnetism:TheimpactofinterfacialintermixingPresentedby:ElizabethSkoropataPhDCandidateattheUniversityofManitoba,DepartmentofPhysicsandAstronomyAdvisor(s):JvanLieropCo-Author(s):R.D.Desautels,H.Ouyang,J.W.FreelandandJ.vanLieropResearchArea(s):SurfacesandInterfaces,CrystallineMaterialsandNanostructuresTounderstandtheoriginofthemagneticpropertiesofcore-shellnanoparticlesnecessitatesaknowledge of core-shell intermixing effects; intermixed layersmodify directly the disorderedsurfacemagnetism of the core particle, and determine the interfacial exchange interactionsthatmediatethemagneticcouplingbetweencoreandshell.Toinvestigatethisissue,wereporton the relationship between interfacial intermixing andmagnetic properties of a series of γ-Fe2O3basedcore-shellnanoparticleswithCu,CoO,MnO,andNiOshells.Usingelementspecifictechniques (Mšssbauerspectroscopy,x-rayabsorptionspectroscopy (XAS)andx-raymagneticcirculardichroism (XMCD)),we identifyan interfacial intermixed layerconsistingof transitionmetalionsfromtheshellthatsubstitutedintotheoctahedral(Oh)andtetrahedral(Td)sitesoftheγ-Fe2O3core.Forγ-Fe2O3/Cuandγ-Fe2O3/NiO, the intermixed layerconsistsof2+cationssubstitutedintotheOh-sitesexclusively.Interestingly,CuandNiOshellshadalsosimilareffectson the nanoparticlemagnetism, both resulting in an increased anisotropy (an enhancedHC)whilealsoreducingsubstantiallythesurfacespindisorderintrinsictoγ-Fe2O3cores(revealedbychanges to HEX and MS(T)). By comparison, the interfacial layer in γ-Fe2O3/CoO containspredominantly Co2+ in Oh-sites and a slight Td-site occupancy, resulting a large increase inintrinsicanisotropyand littleeffecton theγ-Fe2O3 surface spindisorder. Forγ-Fe2O3/MnO,amixtureofMn3+OhandMn2+Td-sitesrevealedamoreradicalsitesubstitution,whichresultedincooperativerelaxationeffectsamongthecoreandinterfacialFe-spins.

PosterNumber:57

Concentrationdependentdiffusionmodellingofelectrodepositedtinonacoppersubstrate

Presentedby:GuilhermeGarridoDamacenoMScCandidateattheUniversityofManitoba,DepartmentofMechanicalEngineeringAdvisor(s):OOjoCo-Author(s):Dr.O.A.OjoResearchArea(s):SurfacesandInterfacesBronze is a desirable material due to its good corrosion, wear and tarnish resistance, lowcoefficientoffrictionandappealingappearance.Conveyingthesepropertiestoothermaterialsbycreatingabronzecoatingisacost-effectiveapproachofutilizingthebeneficialpropertiesofbronze on othermaterials. This can be achieved by the deposition of copper and tin on thematerial's surface, followed by an annealing process to produce bronze. However, duringannealingofthistwometals,aseriesofcomplexphasetransformationstakeplace,whichresultinabronzewithfinalsurfacecompositionthatdependsonaseriesofprocessparameters,suchas, annealing temperature, time and coating thickness. The bronze surface compositioninvariablycontrolsthesurfaceproperties.Inthiswork,thephysicalprocessinvolvedduringtheannealingprocess is elucidated andnumericallymodeled to simulate thedependenceof thebronze final surface composition on the annealing parameters. Experimental verificationconfirmsthetheoreticalpredictions.

PosterNumber:58

ElectrocatalyticReductionofCarbonDioxideusingN-HeterocyclesPresentedby:PatrickGiesbrechtMScCandidateattheUniversityofManitoba,DepartmentofChemistryAdvisor(s):D.E.HerbertCo-Author(s):PatrickK.Giesbrecht,Dr.DavidE.HerbertResearchArea(s):SurfacesandInterfaces,CompositeMaterialSystemsDue to the ever-rising CO2 emission levels from fossil fuel consumption, the formation of acheap,robust,andsustainablecarbon-basedfuelsourcefromCO2 isessential.OnepromisingsysteminvolvestheuseofpyridineasanelectrocatalystforthereductionofCO2toformicacidandmethanolthroughmultipleproton-coupledelectrontransfers(PCET).Faradaicefficienciesexceeding90%formethanolformationhavebeenobservedwhenthissystemiscoupledtoalight-absorbing cathode,p-GaP. Incorporationof this system intoaphotoelectrochemical cellhas been limited, however, due to the slow kinetics and large resulting overpotentials. Byextending theconjugationof thepyridine system to largerN-heterocycles, amoreaccessibleroute to CO2 reduction is expected. In particular, phenanthridine has shown promisingapplication in iminehydrogenation throughaproton-hydride transfer to the substrateundermildconditions. ThisworkinvestigatestheuseofasuiteofN-heterocyclesaselectrocatalystsforprotonandCO2reductiveprocesses,allowingtheselectivityofCO2reductionoverprotonreductiontobedetermined.TheresultingproductsfromCO2reductionwereanalyzedusingspectrometricand spectroscopic techniques, providingproductdistributionandoverall Faradaic efficienciesfor thesesystems. Interestingly,adependenceon theavailabilityof theortho-sitesof theN-heterocycle is observed for the CO2 reduction process. From this work, the CO2 reductivecapabilities of pyridine can be expanded to extended N-heterocycles, allowing a moregeneralizedmechanismtobedeveloped.

PosterNumber:58

SurfaceCharacterizationofCanolaFibre(BrassicanapusL.)UsingScanning

ElectronMicroscopyPresentedby:TasneemVahoraPhDCandidateattheUniversityofManitoba,DepartmentofBiosystemsEngineeringAdvisor(s):JMorrisonCo-Author(s):JasonMorrisonResearchArea(s):SurfacesandInterfaces,SoftandDisorderedMaterialsNatural fibres are extensively used in various industrial applications such asmedical textiles,geotextiles, automobiles, aerospace and apparel. Canolawas developed and is grown for itsoilseedandtheremainderoftheplantisunused.However,thewastecanola(BrassicanapusL.)strawissourceofnaturalfibrethatmightbeusableinavarietyofapplications.Theobjectiveofthiswork is tocharacterize themicrostructureand theelemental contentof thecanola fibre(Red River 1861 variety). The present experiment was carried out using scanning electronmicroscope(SEM)inconjunctionwithenergydispersivespectroscopy(EDS)forcanolafibreforsurfacecharacterizationandinvestigationofthechemicalcompositionofthesample.TheSEMimageswere taken at differentmagnifications ranging from 100x-10000x for the retted andunrettedcanolafibrescoatedusingagold:palladium(60:40)coating.Differingmagnificationsofthe samples enabled observations of non-uniformity of surface microstructures andparticulatesonthefibres.UsingEDSweobservedthatthecarbonandoxygenwerethemajorelements present in canola fibre. The weight % of carbon and oxygen (major elements innatural fibre: canola) at spot1was 57.73% and 42.27%, respectively, and for spot 2 itwas54.26and45.74,respectively.Thestudysuggestswhatcouldbedone in futuretoobtainthesimilarresultsofcanolafibreforcomparisonamongexistingnaturalfibres.