Nano Overview Bottom-Up Approach WAMSER
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Transcript of Nano Overview Bottom-Up Approach WAMSER
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Chemistry andNanomaterials
Carl C. Wamser
Portland State University
Nanomaterials Course - June 27,2006
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Nanoscale = billionths (10-9)
6 billion people
8000 mile diameter
10 billion components
8 inch diameter
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Effects of Nanoscale
Structural differences:
Bulk Carbon
Nanoscale Carbon
arbon Nanotubes
Sumio !i"ima - 1991
60 (#uc$e%ball)
Smalle%& url& 'roto
1996 Nobel rie
*raphite +iamond
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!nstrumentation , !main
. /uantumorral
. 28 3e atomspositioned b%the S45used to
imae them
http://www.nano.gov/html/facts/home_facts.html
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+imensional !ssues
nm µm mm m
Chemistry
Biology
Electronics
molecules polymers supramolecular
assemblies
amino
acids
proteins cells/tissues organisms
semi-
conductorstransistors integrated
circuitscomputers
ONAMI length scale:
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hemistr% !ssues
. Structure , +%namics , S%nthesis
. Structure-3unction orrelations
. Self-ssembled S%stems
. pplications:
7 5aterials
7 #ioloical
7 Enironmental
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ranic E+s
Structure-3unction orrelations (emission ;aelenths)
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uantum Effects
3luorescence of cadmium selenide nanoparticles
2 nm < nm
. #and ap depends on particle sie
(number of atoms in the particle)
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hemical #ondin
. 3orces used to assemble structure: 7 !onic
7 5etallic 7 oalent
7 -bondin
7 5etal-liand 7 >an der ?aals
7 @-@ stac$in
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!onic #ondin
. 5olecular bea$er
epitaA%
. a%er-b%-la%erro;th of
pol%electrol%tes
. 4om 5allou$
enn State B
http:,,;;;CmaprCuclCacCbe,D"onas,omepaeF,Gesearch,ES,ESChtml
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!onic , Electrostatic Effects
. molecular
eleator
. Gesponsie to
acid,base
. FC +C #ad"ic& et alC&
Accts. Chem. Res.,
in pressC
. FC3C Stoddart& B
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!onic , Electrostatic Effects
. onformational 5olecular Gectifiers& C 4roisi and 5C C Gatner& Nano Lett C& 2(2)& H91-H9H (
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5etallic #ondin
meltin point: 1IIJ K'
meltin point: 6H0 K'
*old Statue *old nanoparticles
Nanoscale old has different properties than bul$ old& includin:
appearance& solubilit%& and meltin pointC
thiol stabilied old nanoparticle
old nanoparticles (< nm) in solutionFim utchison& BC reon
http://arkw!ng.uoregon.eu/"hutchlab
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oalent #ondin - arbon
Sinle-;alledcarbon nanotubes:
. armchair - metallic
. ia - semiconductin
. chiral - semiconductin
. multi-;alled - metallic
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oalent #ondin - arbon
arbon nanotubes coated ;ith diamond nanocr%stals
5C C 4erranoa& et alC& Chem. #ater C& 17 (12) pp 3214 - 3220
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%droen #ondin
+N
+ouble
eliA
http://www.havelan.com/ graph!cs/na$%.&pg
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'$' Stac$in - iLuid r%stals
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hare-4rappin 5emor% +eice
iu& -MC #ard& CFC Acc. Chem. ResC
(1999)& I
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Self-ssembled 5onola%er
. 5onola%er of
++# on
raphite(didodec%lbenene)
http://www.nanosc!ence.com/eucat!on/galler(/))B_an!.htm
10 nm
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>an der ?aals !nteractions
. S55S
Self-ssembled
5onola%ers on
5esoporous
Supports
*len 3r%Aell& NN
QuickTime™ and a TIFF (LZW) decompres
are needed to see this pi
http://samms.pnl.gov/
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ol%porph%rin !nterfacial 3ilm (thin)
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ol%porph%rin !nterfacial 3ilm (thic$)
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hotos%nthetic Geaction enter
http://wwwmpibp-!ran"!urtmpgde/#michaelhutter/rcenterhtml
( 1$%% &obel 'rie )( 1$%% &obel 'rie )
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