1989 Fiscal Year Annual Research Report

光励起された不均一界面における電荷移行過程の解明とその新しい応用

Research Project

Project/Area Number	63470064
Research Institution	The University of Tokyo
Principal Investigator	藤島昭東京大学, 工学部, 教授 (30078307)
Co-Investigator(Kenkyū-buntansha)	加藤隆史東京大学, 工学部, 助手 (70214377) 馬場凉東京大学, 工学部, 助手 (70198951) 伊藤公紀横浜国立大学, 工学部, 助教授 (40114376)
Keywords	半導体電極 / トンネル顕微鏡 / 酸化チタン / 電子移行
Research Abstract	光励起下での半導体電極反応の詳細な機構解明は、たとえば電気化学光電池の開発などに重要である。本研究においては不均一界面の電荷移行のプロセスを新しいテクニックであるSTM(走査トンネル顕微鏡)またレ-ザ-パルス励起ポテンシャル法を用いて研究を始め、以下のような重要な成果を得た。 1 半導体一溶液界面のSTM観測が可能となるようなSTM装置の試作をおこなった。まず大気中でのSTM像を得ることができた。STM像を定量性あるものとするための工夫をおこないHOPGで原子像を得た。またMoS_2の良好な像も得ることができた。また光電気化学的反応を水溶中あるいは有機溶媒中において追跡し、MoS_2電極の光溶出機構についての知見を得た。 2 N_2レ-ザ-を用いて、半導体一溶液界面をnsecオ-ダ-に励起、その時のフォトポテンシャルより半導体一溶液界面の電位分布を詳細に検討した。特にSnO_2-SiC界面の電位分布について情報を得ることができアモルファス太陽電池の特性向上に寄与できることがわかった。 3 不均一界面を用いて高精密パタ-ン形成の可能性を追求した。このため新しい光電気化学的手法によるパタ-ン形成法を実施し、高性能の画像等を得た。 4 光励起半導体表面でのガン細胞の殺細胞効果と医療への応用の可能化を検討した。ガン細胞であるHeLa細胞が、光半導体電極上やまた光半導体微粒子をとりこむことにより光照射下で死滅することがわかった。また色素等で修飾した光半導体微粒子を細胞にとりこませその挙動および細胞との相互作用を調べたところ良好な殺細胞効果がみられた。

Research Products

(28 results)

All Other

All Publications (28 results)

[Publications] S.Yoshihara: "In Situ Monitoring of the Surfaca Structures of Copper Plated Matals by using PAS Technique" Electrochimica Acta. 33. 1685-1688 (1988)
[Publications] A.Aruchamy: "Photoelectrochemical Study of the Effect of Inhibitor on the Passivation of Copper in Sodium Hydoroxide Aqueous Electrolyte" J.Electroanal.Chem.244. 333-338 (1988)
[Publications] C.M.Braun: "Charge Fields in Bi_<12>Geo_<20> and Dynamic Flat-band Potential" J.Appl.Phys.63. 5756-5760 (1888)
[Publications] A.Manivannan: "Electroluminescence at the SiC/Electrolyte Interface" J.Luminescence. 42. 43-47 (1988)
[Publications] 小早川紘一: "酸化チタン(IV)の光触媒活性" 日本化学会誌. 1175-1181 (1988)
[Publications] M.Okano: "Photoelectrochemical Polymerization of Pyrrole on ZnO and Its Application of Conducting Pattern Generation" J.Electrochem.Sci.135. 1641-1645 (1988)
[Publications] S.Yamagata: "Photocatalytic Oxidation of Alcohols on TiO_2" Bull.Chem.Soc.Japan.61. 3429-3434 (1988)
[Publications] 吉原佐知雄: "光音響分光による銅めっき過程のin situ観測" 金属表面技術. 39. 527-531 (1988)
[Publications] S.Yoshihara: "Photoacoustic In Situ Measurement of Quantum Efficiency for Photoelectrochemical Evolution of Hydrogen on P-Indium Phosphide" Mat.Res.Bull.23. 759-763 (1988)
[Publications] K.Itoh: "Highly Sensitive Flash Photolysis with Optical Waveguides:Photodeposition of Ag onto Particulate TiO_2 from Solution" J.Am.Chem.Soc.110. 6267-6269 (1988)
[Publications] 吉原佐知雄: "光励起された白金担持P型InPの水素電極反応における電解分解率" 日本化学会誌. 1664-1669 (1988)
[Publications] A.Manivannan: "Investigation of Current Doubling Reactions at SiC/Aqueous Electrolyte Junction in Relation to the Band Energetics" Ber.Bunsenges.Phys.Chem.92. 1522-1528 (1988)
[Publications] K.Itoh: "An Application of Optical Waveguides to Electrochemistry:Constuction of Optical Waveguide Electrodes" J.Phys.Chem.92. 7043-7047 (1988)
[Publications] R.Cai: "Photocatalytic Effect on Tumor Cells" Photomedicine and Photobiology. 253-255 (1989)
[Publications] S.Yamagata: "Photocatalytic Decomposition of 2-Ethoxyethanol on Titanium Dioxide" Bull.Chem.Soc.Japan. 62. 1004-1010 (1989)
[Publications] T.Kato: "Photoelectrochemical Formation of Phenol from Benzene on ZnO" Kagaku Kaishi. 784-788 (1989)
[Publications] A.Aruchamy: "Photoresponse of Oxide Layers on Copper in Aqueous Electrolytes Containing Corrosion Inhivitors" J.Electroanal.Chem. 266. 397-408 (1989)
[Publications] E.Kikuchi: "Mechanism of Stabilization of ZnO Photoanode in High pH Solutions" Bull.Chem.Soc.Japan. 62. 2789-2792 (1989)
[Publications] K.Sakamaki: "A Simple and Rugged Home-Built Scanning Tunneling Microscope for Operation in Both Air and Liquied" Bull.Chem.Soc.Japan. 62. 2890-2896 (1989)
[Publications] T.Amemiya: "Spectroscopic and Electrochemical Behavior of Polypyrrole Films Incorporation Methylene Blue,and Their Enhancement in Electrochromism" Ber.Bunsenges.Phys.Chem.93. 682-689 (1989)
[Publications] K.Sakamaki: "Imaging the Phenol Molecule Adsorbed on TiO_2 by Scanning Tunneling Micorscopy" Surface Sci.219. 531-536 (1989)
[Publications] S.Yamagatqa: "Homogeneous and Heterogeneous Photocatalysis-Polymerization of Cyclohexene Oxide Catalyzed by Ti(OR),and TiO_2" Denki Kagaku. 57. 436-437 (1989)
[Publications] K.Kobayakawa: "Photodecomposition of Kraft Lignin Catalyzed by Titanium Dioxide" Bull.Chem.Sco.Japan. 62. 3433-3436 (1989)
[Publications] A.Aruchamy: "Photoanodic Behaviour of Cu_2O Corrosion Layers Copper Electrdes" J.Electroanal.Chem.273. 125-136 (1989)
[Publications] T.Kato.: "Photocatalytic Formation of Phenol by using Hydrophobic TiO_2 Powders Located at Interface Between Benzene and Water" Denki Kagaku. 57. 1155-1158 (1989)
[Publications] K.Kobayakawa: "Photoanodic Dissolution of n-Type Cu_2O Film" Denki Kagaku. 57. 1217-1218 (1989)
[Publications] R.Baba: "Patten Formation by the Photoelectrodeposition Cating on Illuminated Semiconductor Films" MRS Int'1.Mtg.on Adv.Mats.12. 167-173 (1989)
[Publications] Z.F.Liu: "Observation of Tip-Induced Ordered Molecular Arrangement on Graphite Surfaces by Scanning Tunneling Microscopy" Chem.Lett.17-20 (1989)

1989 Fiscal Year Annual Research Report

光励起された不均一界面における電荷移行過程の解明とその新しい応用

Principal Investigator

藤島 昭 東京大学, 工学部, 教授 (30078307)

Research Products

[Publications] S.Yoshihara: "In Situ Monitoring of the Surfaca Structures of Copper Plated Matals by using PAS Technique" Electrochimica Acta. 33. 1685-1688 (1988)

[Publications] A.Aruchamy: "Photoelectrochemical Study of the Effect of Inhibitor on the Passivation of Copper in Sodium Hydoroxide Aqueous Electrolyte" J.Electroanal.Chem.244. 333-338 (1988)

[Publications] C.M.Braun: "Charge Fields in Bi_<12>Geo_<20> and Dynamic Flat-band Potential" J.Appl.Phys.63. 5756-5760 (1888)

[Publications] A.Manivannan: "Electroluminescence at the SiC/Electrolyte Interface" J.Luminescence. 42. 43-47 (1988)

[Publications] 小早川紘一: "酸化チタン(IV)の光触媒活性" 日本化学会誌. 1175-1181 (1988)

[Publications] M.Okano: "Photoelectrochemical Polymerization of Pyrrole on ZnO and Its Application of Conducting Pattern Generation" J.Electrochem.Sci.135. 1641-1645 (1988)

[Publications] S.Yamagata: "Photocatalytic Oxidation of Alcohols on TiO_2" Bull.Chem.Soc.Japan.61. 3429-3434 (1988)

[Publications] 吉原佐知雄: "光音響分光による銅めっき過程のin situ観測" 金属表面技術. 39. 527-531 (1988)

[Publications] S.Yoshihara: "Photoacoustic In Situ Measurement of Quantum Efficiency for Photoelectrochemical Evolution of Hydrogen on P-Indium Phosphide" Mat.Res.Bull.23. 759-763 (1988)

[Publications] K.Itoh: "Highly Sensitive Flash Photolysis with Optical Waveguides:Photodeposition of Ag onto Particulate TiO_2 from Solution" J.Am.Chem.Soc.110. 6267-6269 (1988)

[Publications] 吉原佐知雄: "光励起された白金担持P型InPの水素電極反応における電解分解率" 日本化学会誌. 1664-1669 (1988)

[Publications] A.Manivannan: "Investigation of Current Doubling Reactions at SiC/Aqueous Electrolyte Junction in Relation to the Band Energetics" Ber.Bunsenges.Phys.Chem.92. 1522-1528 (1988)

[Publications] K.Itoh: "An Application of Optical Waveguides to Electrochemistry:Constuction of Optical Waveguide Electrodes" J.Phys.Chem.92. 7043-7047 (1988)

[Publications] R.Cai: "Photocatalytic Effect on Tumor Cells" Photomedicine and Photobiology. 253-255 (1989)

[Publications] S.Yamagata: "Photocatalytic Decomposition of 2-Ethoxyethanol on Titanium Dioxide" Bull.Chem.Soc.Japan. 62. 1004-1010 (1989)

[Publications] T.Kato: "Photoelectrochemical Formation of Phenol from Benzene on ZnO" Kagaku Kaishi. 784-788 (1989)

[Publications] A.Aruchamy: "Photoresponse of Oxide Layers on Copper in Aqueous Electrolytes Containing Corrosion Inhivitors" J.Electroanal.Chem. 266. 397-408 (1989)

[Publications] E.Kikuchi: "Mechanism of Stabilization of ZnO Photoanode in High pH Solutions" Bull.Chem.Soc.Japan. 62. 2789-2792 (1989)

[Publications] K.Sakamaki: "A Simple and Rugged Home-Built Scanning Tunneling Microscope for Operation in Both Air and Liquied" Bull.Chem.Soc.Japan. 62. 2890-2896 (1989)

[Publications] T.Amemiya: "Spectroscopic and Electrochemical Behavior of Polypyrrole Films Incorporation Methylene Blue,and Their Enhancement in Electrochromism" Ber.Bunsenges.Phys.Chem.93. 682-689 (1989)

[Publications] K.Sakamaki: "Imaging the Phenol Molecule Adsorbed on TiO_2 by Scanning Tunneling Micorscopy" Surface Sci.219. 531-536 (1989)

[Publications] S.Yamagatqa: "Homogeneous and Heterogeneous Photocatalysis-Polymerization of Cyclohexene Oxide Catalyzed by Ti(OR),and TiO_2" Denki Kagaku. 57. 436-437 (1989)

[Publications] K.Kobayakawa: "Photodecomposition of Kraft Lignin Catalyzed by Titanium Dioxide" Bull.Chem.Sco.Japan. 62. 3433-3436 (1989)

[Publications] A.Aruchamy: "Photoanodic Behaviour of Cu_2O Corrosion Layers Copper Electrdes" J.Electroanal.Chem.273. 125-136 (1989)

[Publications] T.Kato.: "Photocatalytic Formation of Phenol by using Hydrophobic TiO_2 Powders Located at Interface Between Benzene and Water" Denki Kagaku. 57. 1155-1158 (1989)

[Publications] K.Kobayakawa: "Photoanodic Dissolution of n-Type Cu_2O Film" Denki Kagaku. 57. 1217-1218 (1989)

[Publications] R.Baba: "Patten Formation by the Photoelectrodeposition Cating on Illuminated Semiconductor Films" MRS Int'1.Mtg.on Adv.Mats.12. 167-173 (1989)

[Publications] Z.F.Liu: "Observation of Tip-Induced Ordered Molecular Arrangement on Graphite Surfaces by Scanning Tunneling Microscopy" Chem.Lett.17-20 (1989)

藤島昭東京大学, 工学部, 教授 (30078307)