1994 Fiscal Year Annual Research Report

フォトエレクトロクロミズムを用いた新機能材料の創成とその表示素子への応用

Research Project

Project/Area Number	04505004
Research Institution	The University of Tokyo
Principal Investigator	藤嶋昭東京大学, 工学部, 教授 (30078307)
Co-Investigator(Kenkyū-buntansha)	石田裕日本ペイント(株), 中央研究所, 主席研究員小早川紘一神奈川大学, 工学部, 助手 (40078332) 佐藤祐一神奈川大学, 工学部, 教授 (20201535) 馬場凉東京大学, 工学部, 助手 (70198951)
Keywords	エレクトロクロミズム / フォトクロミズム / MoO_3 / 電気化学反応
Research Abstract	本研究は、オプトエレクトロニクス材料の一つである金属酸化物半導体において申請者らが発見した光電子機能を利用し、これを表示・記録素子として実用化したものであある。金属酸化物半導体エレクトロクロミズム(EC)、フォトクロミズム(PC)は周知であるがPC半導体の禁止帯以上のエネエルギーの紫外光による反応しか報告されていなかった。かつ紫外光発生には太陽のエネルギー消費する大型装置が必要である。今回申請者らは酸化物半導体の一つであるMoO_3に電気化学的な前処理(EC反応)を施すことよより、可視光でPC反応が進行する現象を発見した。この現象を利用すれば、小型で簡便な半導体レーザーを可視光光源として用い、PC反応を誘起することが出来る。さらに、PC反応による着色部分を再度EC反応により消色可能であること、これら着消反応は繰り返し可能であることも可能であることも見いだした。本研究では、上記の特異なPCおよびEC反応を利用し、レーザープリンター等への応用を踏まえ、安価、簡便、再利用可能な表示・記録素子を開発することを目的としてきたが、当初の研究計画を達成することが出来た。本年度は最終年度でもあり、総括的なまとめも含め、下記について重点的に研究を遂行した結果、良好な成果を挙げることが出来た。特に、民間の研究者の協力を得て、大学の研究者があまり得意としない実用化に関し、適切な指針を得たことにより、一層の成果を挙げることが出来た。 1.書き込み、消去可能な表示素子の開発 2.微細加工可能、位置選択的着消色可能な表示素子の開発

Research Products

(18 results)

All Other

All Publications (18 results)

[Publications] Z.F.Liu: "Direct Observation of the Secondary Structure of Unfolded Pseudomonas-Cytochrome C_<551> by Scanning Tunneling Microscopy" Surface Science Lett.284. L411-L415 (1993)
[Publications] K.Ohkawa: "Electrochemical Reduction of Carbon Dioxide on Hydrogen-storing Materials.---Part 1.The Effect of Hydrogen Absorption on the Electrochemical Behavio on Palladium Electrodes" J.Electroanal.Chem.345. 445-456 (1993)
[Publications] K.Ohkawa: "Electrochemical Reduction of Carbon Dioxide on Hydrogen-storing Materials.---Part II.Copper-Modified Palladium Electrode" J.Electroanal.Chem.348. 459-464 (1993)
[Publications] T.Amemiya: "Frequency-Resolved Faradaic Processes in Polypyrrole Films Observed by Electromodulation Techniques:Electrochemical Impedance and Color Impedance Spectroscopies" J.Phys.Chem.97. 4187-4191 (1993)
[Publications] T.Amemiya: "Dynamics of Faradaic Processed in Polypyrrole/polystyrenesulfonate Composite Films in the Presence and Absence of a Redox Species in Aqueous Solutions" J.Phys.Chem.97. 4192-4195 (1993)
[Publications] O.Sato: "Self-Ordered Film of Hemicyanine Derivative Characterized by Phase-Sensitive Optical Second-Harmonic Generation" Jpn.J.Appl.Phys.32 Part1. 1201-1203 (1993)
[Publications] K.Ohkawa: "Electrochemical Reduction of Carbon Dioxide on Hydrogen-storing Materials:--Part 4.Electrochemical Behavior of the Pd Electrode in Aqueous and Nonaqueous Electrolyte" J.Electroanal.Chem.369. 247-250 (1994)
[Publications] A.Fujishima: "Thin Semiconductor Films:Photoeffects and New Applications" Electrochem.Acta. 39. 1229-1236 (1994)
[Publications] H.Yoshiki: "Electroless Copper Plating Using ZnO Thin Film Coated on a Glass Substrate" J.Electrochem.Soc.141. L56-L58 (1994)
[Publications] T.Yano: "Observation and Surfaces Modification of Electropolymerized Poly(N-Methylpyrrole)Using Atomic Force Microscopy" J.Vac.Sci.Technol.B,. 12. 1596-1599 (1994)
[Publications] L.A.Nagahara: "Mica Etch Pits as a HeightCalibration Source for Atomic Force Microscopy" J.Vac.Sci.Technol.B,. 12. 1694-1697 (1994)
[Publications] O.Sato: "A Novel Approach to the Polydiacetylene Langmuir-Blodegett Film by the Surface-Specific Optical Third Harmonic Generation Based on the Angular Momentum Conservation Rule" J.Electroanal.Chem.372. 279-281 (1994)
[Publications] Jin-Fang Zhi: "Conjugated Molecular System of Photochromism and Electrochromism.Photoelectrochemical Behavier of Nitrospirobenzopyran at Low Temperature" Chem.Lett.1521-1524 (1994)
[Publications] L.Jiang: "Surface Photovoltage Spectroscopy and Mapping by Atomic Force Microscopy" Chem.Lett.1975-1978 (1994)
[Publications] X.M.Yang: "In Situ Observation of the Au-Hg Alloy Formation on a Gold Electrode Surface by Atomic Force Microscopy" Chem.Lett.2059-2062 (1994)
[Publications] T.Saeki: "Electrochemical Reduction of Liquid CO_2.---Drastic Enhancement of Current Density---" J.Electrochem.Soc.141. L130-L132 (1994)
[Publications] H.Sakai,: "Intracellular Ca^<2+> Concentration Change of T24 Cell Under Irradiation in the Presence of TiO_2 Ultrafine Particles" Biochim.Biophys.Acta. 1201. 259-265 (1994)
[Publications] H.Sakai.: "Separate Monitoring of Reaction Products Formed at Oxidation and Reduction Sites of TiO_2 Photocatalysts Using a Microelectrode" J.Electroanal.Chem.379. 199-205 (1995)

1994 Fiscal Year Annual Research Report

フォトエレクトロクロミズムを用いた新機能材料の創成とその表示素子への応用

Principal Investigator

藤嶋 昭 東京大学, 工学部, 教授 (30078307)

Research Products

[Publications] Z.F.Liu: "Direct Observation of the Secondary Structure of Unfolded Pseudomonas-Cytochrome C_<551> by Scanning Tunneling Microscopy" Surface Science Lett.284. L411-L415 (1993)

[Publications] K.Ohkawa: "Electrochemical Reduction of Carbon Dioxide on Hydrogen-storing Materials.---Part 1.The Effect of Hydrogen Absorption on the Electrochemical Behavio on Palladium Electrodes" J.Electroanal.Chem.345. 445-456 (1993)

[Publications] K.Ohkawa: "Electrochemical Reduction of Carbon Dioxide on Hydrogen-storing Materials.---Part II.Copper-Modified Palladium Electrode" J.Electroanal.Chem.348. 459-464 (1993)

[Publications] T.Amemiya: "Frequency-Resolved Faradaic Processes in Polypyrrole Films Observed by Electromodulation Techniques:Electrochemical Impedance and Color Impedance Spectroscopies" J.Phys.Chem.97. 4187-4191 (1993)

[Publications] T.Amemiya: "Dynamics of Faradaic Processed in Polypyrrole/polystyrenesulfonate Composite Films in the Presence and Absence of a Redox Species in Aqueous Solutions" J.Phys.Chem.97. 4192-4195 (1993)

[Publications] O.Sato: "Self-Ordered Film of Hemicyanine Derivative Characterized by Phase-Sensitive Optical Second-Harmonic Generation" Jpn.J.Appl.Phys.32 Part1. 1201-1203 (1993)

[Publications] K.Ohkawa: "Electrochemical Reduction of Carbon Dioxide on Hydrogen-storing Materials:--Part 4.Electrochemical Behavior of the Pd Electrode in Aqueous and Nonaqueous Electrolyte" J.Electroanal.Chem.369. 247-250 (1994)

[Publications] A.Fujishima: "Thin Semiconductor Films:Photoeffects and New Applications" Electrochem.Acta. 39. 1229-1236 (1994)

[Publications] H.Yoshiki: "Electroless Copper Plating Using ZnO Thin Film Coated on a Glass Substrate" J.Electrochem.Soc.141. L56-L58 (1994)

[Publications] T.Yano: "Observation and Surfaces Modification of Electropolymerized Poly(N-Methylpyrrole)Using Atomic Force Microscopy" J.Vac.Sci.Technol.B,. 12. 1596-1599 (1994)

[Publications] L.A.Nagahara: "Mica Etch Pits as a HeightCalibration Source for Atomic Force Microscopy" J.Vac.Sci.Technol.B,. 12. 1694-1697 (1994)

[Publications] O.Sato: "A Novel Approach to the Polydiacetylene Langmuir-Blodegett Film by the Surface-Specific Optical Third Harmonic Generation Based on the Angular Momentum Conservation Rule" J.Electroanal.Chem.372. 279-281 (1994)

[Publications] Jin-Fang Zhi: "Conjugated Molecular System of Photochromism and Electrochromism.Photoelectrochemical Behavier of Nitrospirobenzopyran at Low Temperature" Chem.Lett.1521-1524 (1994)

[Publications] L.Jiang: "Surface Photovoltage Spectroscopy and Mapping by Atomic Force Microscopy" Chem.Lett.1975-1978 (1994)

[Publications] X.M.Yang: "In Situ Observation of the Au-Hg Alloy Formation on a Gold Electrode Surface by Atomic Force Microscopy" Chem.Lett.2059-2062 (1994)

[Publications] T.Saeki: "Electrochemical Reduction of Liquid CO_2.---Drastic Enhancement of Current Density---" J.Electrochem.Soc.141. L130-L132 (1994)

[Publications] H.Sakai,: "Intracellular Ca^<2+> Concentration Change of T24 Cell Under Irradiation in the Presence of TiO_2 Ultrafine Particles" Biochim.Biophys.Acta. 1201. 259-265 (1994)

[Publications] H.Sakai.: "Separate Monitoring of Reaction Products Formed at Oxidation and Reduction Sites of TiO_2 Photocatalysts Using a Microelectrode" J.Electroanal.Chem.379. 199-205 (1995)

藤嶋昭東京大学, 工学部, 教授 (30078307)