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九州大学 先導物質化学研究所 高原研究室

Japanese / English

〒819-0395 福岡市西区元岡744 九州大学 先導物質化学研究所 

高原研究室

〜Welcome to Takahara Laboratory's HP〜

 
 <Takahara Laboratory>
  Institute for Materials Chemistry and Engineering, Kyushu University
  744 Motooka, Nishi-ku, Fukuoka 819-0395, JAPAN
  Tel: +81-92-802-2516   Fax: +81-92-802-2518

Research

 -Research Area-

 Section of Supramolecular Chemistry
 Chemistry of Supramolecular Assemblies

1. Precise 2-D and Control of Aggregation Structure of Organic Thin Films


 The purpose of the research is to establish the method to control 2-D and 3-D of molecularly organized organic ultra thin films.
 The polymerized organosilane monolayers with various functional groups at the hydrophobic ends were immobilized on the silicone wafer substrate either by Langmuir-Blodgett (LB) method or chemical vapor -phase deposition.
 Patterning of polymer thin film was achieved by clean lithography technique employing vacuum ultraviolet (VUV) light.
 After VUV lithography followed by the chemisorption of the second component, a novel multiphase surfase with defferent surfase chemistry can be prepared.
 Also ,by selective chemical conversion of the functional groups of the certain area and subsequent immobilization of second or third layers, a novel three-demensionl nano-structure can be prepared.

     

2. Analysis of the Interaction between Protein and Polymer Surfaces

 

 The interaction between biological molecule and polymer surfase pays an important role in biological molecules.
 The two-demensionally controlled polymer surfase has been prepared and the interaction between protein and surfases was studied based on scanning force micriscopy (SFM), surfase plasmon resonance spectroscopy (SPR), and infra-red spectroscopy.
 it has been revealed that the strong hydrophobic interaction induced the denaturation of the adosorbed protein.
 Also, the mechanism on the selective adsorption of plasma protein onto phase separation was explained based on the electrostatic repulsion between adsorbed protein and protein in the solution.

     

3. Preparation of Novel (Organic/Inorganic) Nanohybrid from Aluminiumsilicate Nanofiber and Nanoparticle

     

 Natural inorganic nonfiber "imogolite" and nanoparticle "allophane" can be found out in volcano ash or weatherd pumice.
 The purpose of this reseach is to propose a method to prepare novel "green nanohybrid" from natural inorganic nanofiller and biodegradable polymers.
 Imogolite and allophane can be separated from weathered pumice.
 Atomic force micriscopic observation revealed that the imogolite molecules form fibrous network at pH=3.0.
 Since the outermost surfaces of imogolite and allophane are coverd with Al-OH groups, a strong interaction can be expected between Al-OH and organic molecules with -PO(OH)2 group.
 Organic molecules and oligomers with -PO(OH)2 group can be chemisorbed onto the surfases of imogolite and allophane.
 An increase in affanity of organophied imogolite and allophane to synthetic polymer was achieved.
 It is expected that molecularly dispersed imogolite and allophane wil improve physicochemical properties of polymeric materials.
 Also, an attempt will be made to prepare a green nanohybrid from biodegradable polymers.

     

4. Analysis of Molecular Recognition by Direct Force Measurement of Force between Various Functional groups-Chiral recognition

     

 The understanding the interaction force between various functional groups is important for construction of molecular assembly.
 Attempts have been made on the evaluation of the force between various functional groups by using scanning force microscopy (SFM).
 In theory, enantiomer surface should have identical physical, mechanical and wetting properties.
 However, the surface immobilized chiral molecule can distinguish the enantiomer.
 Then, the question arises whether the SFM can directly discriminate different chirality.
 Chiral functional groups were immobilized on the cantilever tip and the substrate.
 The adhension forces between chiral functional groups were evaluated from the force-distance curve of atomic force microscopy.
 Preliminary investigation revealed that the adhension force between R-AETA [(1-(9-anthryl)-2,2,2-trifluoroethoxy)acetic acid] and S-DNBP[N-(3,5-dinitrobenzoyl)phenylglycine] was larger than that between S-DNBP and S-AETA because of the presense of three point interactions.

5. Development of a Novel Technique for the Characterization of Molecular Organized Systems-Neutron Reflectivity

     

 A new neutron reflectometer (ARISA) with vertical scattering-plane geometry for studying free surface was installed at a thermal neutron port viewing an ambient-temperature water moderator at KENS.
 AT is a member of instrumentation of ARISA at KENS.
 ARISA is a unique reflectometer using thermal neutrons at a pulsed spallation neurton source as well as the first neutron reflectometer with vertical scattering-plane geometry in Japan.
 An inner iron collimator with two beam holes and neutron beam-line shield were installed to minimize high-energy neutrons directry coming from the neutron-target due to the shield loss produced by beam holes themselves.
 The inne collomator makes two independent downward beam holes with different angles, 0 - 0.47 and 1.4.
 The neutron beam-line shield has function of an additional beam-shutter as well.
 The designed specifications for the coverd range of neutron momentum transfer, qz, in the vertical direction are 0.08 nm-1 - 0.6 and 0.08 nm-1 -2.8 nm-1 for liquid and solid samples, respectively, using the neutrons with 0.05 - 0.4 nm wavelengths.
 

6. Construction of Supramolecular System and Novel (Organic/inorganic) Hybrid Based on Precise Macromolecular Design

     

 Precise control of macromolecular architecture is an important theme in recent polymer science, because it is one significant methodology to produce novel and/or improved properties of the polymer materials.
 Recent advancement of controlled radical polymerization systems has enabled us to apply living polymerization methods, which results in the synthesis of a wide variety of new polymers and, in particular, functionalized polymers with predetermined molecular weights and properties.
 The purpose of this research is to construct a supramolecular system and novel (organic/inorganic) hybrid system based on such precise macromolecular design.


Member

Professor
Atsushi Takahara       
Associate Professor
Ken Kojio       
Assistant Professor
Yuji Higaki
Assistant Professor
Tomoyasu Hirai      
Research Assistant Professor
Masaru Mukai
Guest Professor
Liu Yi
Postdoctoral Fellow
Saburo Yamamoto
Postdoctoral Fellow
Ma Wei
Postdoctoral Fellow
Kazutaka Kamitani
Postdoctoral Fellow
Yuko Konishi
Secretary
Aiko Miyamoto
Technical Staff
Yoko Iki
Technical Staff
Akiko Ishibashi
Technical Staff
Tomoko Kajiwara
Technical Staff
Tatsuya Kubozono
Technical Staff
Nobuhisa Takayama
Technical Staff
Keiko Higaki
Technical Staff
Aya Fujimoto
Technical Staff
Kazutoshi Yokomachi
DC3
Park Kyung Lynne  
DC3
Yucheng Zhang
DC3
Keita Akamine
DC3
Shuhei Nozaki
DC3
Rahmawati
DC2
Masanao Sato 
DC1
Li Lin Lin  
MC2
Yoshihiro Inutsuka
MC2
Tomoki Kato
MC2
Chigusa Nagano
MC1
Cheng Chao-Hung 
MC1
Tatsunori Sakamaki
MC1
Hitoshi Simamoto
MC1
Shiori Masuda
B4
Kosuke Igata
B4
Kiyu Uno
B4
Kento Fukada

Takahara Lab (高原研究室)高原研究室

〒819-0395
福岡市西区元岡744 CE41棟 2F
九州大学 先導物質化学研究所
TEL 092-802-2516
FAX 092-802-2518
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