2/15( ) (15:25 15:50)

2/15 ( ) (15:00 15:25)

2/15( ) (16:20 16:45)

( ) 2/15( ) (15:55 16:20)

700-8530 1-1-1 086-251-7112 086-251-8467 s-renkei@adm.okayama-u.ac.jp URL http://www.okayama-u.net/renkei/

2012.2.15-17

Okayama University one of the leading universities in Japan, aims to create and establish a new paradigm for the sustainable development of the world. In this exhibition & conference, we present the following four themes of the new nano technology at “Seeds & Needs Seminar A “ held on February 15 , as well as introduce them in the booth E-22. Please visit our seminar and booth.

Thin films of Rare-earth iron oxides (Green ferrites) prepared by liquid phase coating technique 2/15 (Wednesday) (15:55 16:20)

Masayuki Kanehara

Division / Position Research Core for Interdisciplinary Sciences assistant professor Lecture Abstract

Low temperature fabrication of reliable electrical circuits with electroconductive solution material is indispensable for modern printed electronics. The search for solution-based electron conductive materials that provide simultaneously high electron conductivity and convenient room temperature deposition is also an important research direction, with the resulting expectations of new technologies (such as flexible computers, large-area high-resolution displays and electronic paper) and lower-cost device fabrication. Stably solution soluble metal nanoparticles (NPs) are widely recognized for making metallic electrical circuit by printing process. However, the insulating nature of organic ligands on metal NPs results in quite poor interparticle carrier transport property. Relatively high temperature, over 150 C, annealing process is necessary in order to remove the ligands. Here we show that π-junction gold nanoparticles drastically improve the interparticle carrier transport property. By ambient condition deposition of the aqueous solution of Au NPs gives electron conductive metallic thin film without any further post treatment.

Division / Position Graduate School of Natural Science and Technology Professor Lecture Abstract

Iron oxides are important functional materials used as magnetic materials, catalysts, pigments in various industrial fields. Although a huge amount of iron oxides with unique morphologies, microstructures and composition, which we call biogenous iron oxide (BIOX), are produced by iron-oxidizing bacteria in natural aquatic environments, they have been regarded as dirty and useless mud. Here we clarify the features of BIOX and explore applicable field of BIOX. We found that this material was primarily composed of amorphous iron oxide nanoparticles approx. 3 nm across and these particles were aggregated to form secondary particles and finally they were complicatedly aggregated to form microtubule 1μm in diameter, and had high surface area of 280 m2/g. Furthermore, BIOX was chemically modified with silane coupling agents to give organic–inorganic hybrid materials, which were then used as immobilization supports for enzyme and Pd. BIO-M, which was prepared by modifying BIOX with 3-methacryloxypropyltrimethoxysilane, was found to be the best immobilization support for lipase. The immobilized lipases showed remarkably high catalytic activity; for example, Burkholderia cepacia lipase immobilized on BIO-M showed a turnover frequency as high as 33,000 h–1 for 1-phenylethanol. On the other hand, the treatment of BIO with a silane coupling agent bearing a NHC moiety (BIO-IM) gave a good immobilization support for Pd, which could be used for the Suzuki–Miyaura cross coupling reaction under solvent-free conditions. SEM indicated that there are Pd nanoparticles at the surface of BIO-IM. These immobilized catalysts could be recycled at least five times.

Division / Position Graduate School of Natural Science and Technology Associate Professor Lecture Abstract

Rare earth iron oxide RFe O ( green ferrite) discovered in Japan in the 1970’s attracts much attentions for future electric devices, because it has unique properties such as ferroelectricity, ferromagnetism, and high infrared absorption, in accompany with the electronic charge order. However, precise atmosphere control and heat-treatment are required to synthesize the RFe O crystals. There are few reports which succeeded in preparing RFe O i n thin film form. Only PLD method which is a kind of the vacuum deposition was succeeded before. On the other hand, the liquid phase coating is most powerful technique to fabricate the thin films with large area and low cost. I introduce here the results manufacturing the RFe O films by liquid coating for the first time in the world. Optimizations of the solution preparation, coating and heat-treatment conditions were required.

Jun Takada

If you have any inquiry,please contact us. Okayama University Organization for Research Promotion & Collaboration 1-1-1,Tsushima- aka, itaku,Okayama 700-8530 Phone +81-86-251-7112 FAX +81-86-251-8467 mail s-renkei@adm.okayama-u.ac.jp URL http://www.okayama-u.net/renkei/

Tatsuo Fujii

Division / Position Research Core for Interdisciplinary Sciences assistant professor Lecture Abstract

Catalytic oxidation of hydrocarbons is an industrially important reaction by following reasons: 1) Synthesis of chemical products by partial oxidation Hydrocarbons are functionalized by addition of adequate number of oxygen atoms. In the present technique, the oxidation is performed under harsh reaction conditions, and so selective functionalization is difficult. 2) Oxidative removal of unburned hydrocarbons in exhaust gas by perfect combustion Exhaust gas from lean-burn gas engine contains 1,500 - 2,500ppm of unburned hydrocarbons. Since hydrocarbons have high global warming effect (about 20 times higher than CO2), they are not to be disregarded. The present ternary catalyst cannot sufficiently respond to such exhaust gas under oxygen rich reaction conditions. In this presentation, catalytic oxidation of hydrocarbons using composite metal oxides of La, Mn, Fe, etc. is reported.

Composite metal catalyst for oxidation of hydrocarbons 2/15 (Wednesday) (15:00 15:25)

Yuta Nishina

Amorphous iron oxide nanoparticles of bacterial origin and their application to immobilized catalysts 2/15 (Wednesday) (16:20 16:45)

2012.2.15-17 Tokyo

Big Sight

Room Temperature Conductive Metal Nanoinc 2/15 (Wednesday) (15:25 15:50)

:

TEL : 086-251-8718 E-mail : nisina-y@cc.okayama-u.ac.jp

Composite Metal Catalysts for Oxidation of Hydrocarbons

ABO3

SEM LaMnxFe1-xO3 XRD

entry 1-3 Al2O3 5wt% entry 5 Al2O3

X=1

X=0.9

X=0.7

X=0.5

X=0.3

X=0.1

X=0 500 nm 500 nm

LaMn0.3Fe0.7O3 LaMnO3

A

B

O

Contact information: Yuta Nishina Okayama University, Research Core for Interdisciplinary Sciences TEL: 086-251-8718 E-mail: nisina-y@cc.okayama-u.ac.jp

Okayama University, Research Core for Interdisciplinary Sciences Yuta Nishina

Composite Metal Catalysts for Oxidation of Hydrocarbons

Synopsis Combined metal microparticles are applied for hydrocarbon oxidation which is industrially and environmentally important

Features of perovskite-type oxide (ABO3) Releasing lattice oxygen easily High oxygen-ion conductivity

Miniaturization of particle by liquid phase synthesis

Valence control by elemental substitution

Development for highly active catalyst

Besides direct oxidation of various hydrocarbons, these catalysts can be applied for catalytic combustion, purification of exhaust gas.

Direct oxidation of hydrocarbons with catalyst and oxygen

Electron microscope images of synthesized catalyst SEM images

XRD patterns of LaMnxFe1-xO3

Perovskite-type oxides were employed as combined metal compounds

entries 1-3 : mixing catalyst and Al2O3 with motor (catalyst content 5 wt% entry 5 : made by heating after solution impregnation method

X=1

X=0.9

X=0.7

X=0.5

X=0.3

X=0.1

X=0 500 nm 500 nm

LaMn0.3Fe0.7O3 LaMnO3

A

B

O

30

Roll to Roll

Au, Ag)

Yole Developpement SEMI Global Update

Ambient Condition Printable Metal Nanoink

TEL:086-251-8709 e-Mail kaneha-m@cc.okayama-u.ac.jp

Okayama University Masayuki KANEHARA

Printed Electronics Huge market (trillions of Yen), 30 years later

NEWLONG SEIMITSU KOGYO

Low temperature processes is necessary in Roll to Roll mass production using low cost plastic substrates.

By Printing and drying under ambient condition, electrodes and circuits can be fabricated on any substrate.

Ambient Conductive Metal Au, Ag) Nanoink

Ink-jet print

Yole Developpement SEMI Global Update

Ambient Condition Printable Metal Nanoink

Contact info Masayuki KANEHARA, Okayama University TEL:086-251-8709 e-Mail kaneha-m@cc.okayama-u.ac.jp

Thin films of rare-earth iron oxides (green ferrites) prepared by liquid phase coating technique

086-251-8107 E-mail tfujii@cc.okayama-u.ac.jp

[ ]1970RFe2O4( )

RFe2O4

[ ]

Fe

RFe2O4

5 mm5 mm5 mm

RFe2O4

2011-002596 2008-3087802011-002596 2008-308780

p/n

[ ]

500 nm

500 nm

X SEM

(00l) Eg= 0.56 eV

RFe2O4

V

RFe2O400l

Thin films of rare-earth iron oxides (green ferrites) prepared by liquid phase coating technique

Contact toTatsuo FUJII, Associate Professor, Department of Applied ChemistryTel +81-86-251-8107 E-mail tfujii@cc.okayama-u.ac.jp

[Research Outline]Rare earth iron oxide RFe2O4 (green ferrite) discovered in Japan in the 1970’s attracts much attentions for future electric devices, because it has unique properties such as ferroelectricity, ferromagnetism, and high infrared absorption, in accompany with the electronic charge order. Recently, we first succeeded in preparing well-crystallized RFe2O4 films by using a liquid phase coating. To obtain the RFe2O4 films, optimizations of the solution preparation, coating and heat-treatment conditions were required.

Ferroelectricity Pyrosensor

Solar battery

[Results]

Technical issuesControl the complex structure and compositeControl the oxygen stoichiometryand iron charge order

Solutions

Forming the RFe2O4 films

Coated with a homogeneous solution containing precursor ionsPrecise control of heat-treatment temperature and oxygen pressure duringthe crystallization process

5 mm5 mm5 mm

aqueous precursor solution

spin coatingheat-treatment

Characterization of the RFe2O4 films

Japan Patent Application2011-002596 Thin films of dielectric compounds and their synthesis2008-308780 Synthesis of dielectric compounds

Japan Patent Application2011-002596 Thin films of dielectric compounds and their synthesis2008-308780 Synthesis of dielectric compounds

Simple equipment for making thin film low cost initial investment maintenanceUse of pure water solvent system eco-friendly/easy-recyclablep-n junction on semiconductor demonstrate the potential of device applications

[Research benefits]

500 nm

500 nm

Structure XRD patterns and a SEM image

Film sample(00l) orientation

Powder sample

PropertiesOptical absorption Electric conduction

Eg= 0.56 eV

Semiconductor substrate

RFe2O4 film

V

Absorption edge in the near infrared regionCharacteristics of the semiconductive nature

RFe2O4 films were successfully grown on substratesClear (00l)-orientation occurred on the sapphire substrate

Tatsuo FUJII and Naoshi IKEDA, Graduate school of natural science and technology, Okayama university

Fe3+-rich “+” charge

Fe2+-rich “ ” charge

“+” plane“�” plane

Amorphous Iron Oxide Nanoparticles of Bacterial Origin and Their Application to Immobilized Catalysts

TEL: 086-251-8106 Email: jtakada@cc.okayama-u.ac.jp

1 �m

10 nm

280 m2/g

20-40 nm

<3 nm

Inte

nsity

(a.u

.)

80706050403020102� (deg.) Cu-K�

d = 0.26 nm

d = 0.15 nm

d = 0.27 nm

500 nm 5 nm

Run 1st 2nd 3rd 4th 5th (%)a 97 98 98 94 94

a Determined by 1H NMR spectra.

-

BIO Pd

Amorphous Iron Oxide Nanoparticles of Bacterial Origin and Their Application to Immobilized Catalysts

Graduate school of Natural Science and Technology, Okayama University

Contact information: Jun Takada Graduate School of Natural Science and Technology, Okayama University TEL: 086-251-8106 Email: jtakada@cc.okayama-u.ac.jp

1 �m

10 nm

Inte

nsity

(a.u

.)

80706050403020102� (deg.) Cu-K�

d = 0.26 nm

d = 0.15 nm

d = 0.27 nm

�Run 1st 2nd 3rd 4th 5th

conv. (%)a 97 98 98 94 94 a Determined by 1H NMR spectra.

�

500 nm 5 nm

BIOX Pd

20-40 nm

<3 nm

Jun Takada

B I OX R S i ( O R ) 3

t o l u e n e S i R O

O

O

B I O - M , A , P o r m - B I O -M

b i og e n o u s i r o n o x i d e

m - B I OX o r

R 1 R 2

O H

R 1 R2

O A c

R 1 R 2

O H + A c O C H = C H 2

i -P r2 O , 3 0 o C

a : R 1 = M e , R 2 = P h b : R 1 = M e , R 2 = 2 -n a p h t h y l c : R 1 = E t , R 2 = 2 - n a p h t h y l

( R ) - 2 ( S ) - 1 1

Ema, T. et al., Green Chem. 13, 3187-3195 (2011).

Mandai, K. et al., Tetrahedron Lett. 53, 329-332 (2012).