Charge Transport Properties of Polythionine Films Dependent on Electrode Potential and Solution pH
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- WANG Wei
- Department of Material Chemistry, Faculty of Engineering, Kanazawa University
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- KOMURA Teruhisa
- Department of Material Chemistry, Faculty of Engineering, Kanazawa University
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- YAMAGUCHI Takahiro
- Department of Material Chemistry, Faculty of Engineering, Kanazawa University
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- TAKAHASHI Kohshin
- Department of Material Chemistry, Faculty of Engineering, Kanazawa University
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<p>The charge-transport properties of polythionine film were studied by cyclic voltammetry and ac impedance spectroscopy. The redox reaction of polythionine proceeded by a two-electron, two-proton transfer mechanism. Both the low-frequency resistance and the low-frequency capacitance obtained from the ac impedance response were proportional to the film thickness. The former showed a minimum, and the latter showed a maximum, at the half-wave potential. The coupled diffusion coefficient of electrons and protons also showed a maximum at the half-wave potential. This relationship between the oxidation level and the diffusion coefficient indicated that the rate of charge transport in the film may be controlled by electron transport. A decrease in the diffusion coefficient with increasing pH implied 1electron hopping accompanied with intermolecular proton exchange.</p>
収録刊行物
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- Electrochemistry
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Electrochemistry 68 (1), 17-23, 2000-01-05
公益社団法人 電気化学会
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詳細情報 詳細情報について
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- CRID
- 1390001277391061376
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- NII論文ID
- 10004273968
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- NII書誌ID
- AN00151637
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- ISSN
- 21862451
- 13443542
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- NDL書誌ID
- 4952519
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用可