Impedance spectra in a 2.5 M H2SO4 solution and kinetic characteristics of reactions in the Fe(CN)63−/4− redox system are measured for thin-film electrodes of tetrahedral amorphous carbon (ta-C). After an anneal in a vacuum at 700 to 900°C or implantation of C+ ions (1015 to 1017 ion/cm2), ta-C films acquire electrochemical activity, which can be explained by an increased content of sp2 carbon.
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Chinese Acad Sci, Shanghai Inst Met, Ion Beam Lab, Shanghai 200050, Peoples R ChinaChinese Acad Sci, Shanghai Inst Met, Ion Beam Lab, Shanghai 200050, Peoples R China
Chen, ZY
Yu, YH
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机构:Chinese Acad Sci, Shanghai Inst Met, Ion Beam Lab, Shanghai 200050, Peoples R China
Yu, YH
Zhao, JP
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机构:Chinese Acad Sci, Shanghai Inst Met, Ion Beam Lab, Shanghai 200050, Peoples R China
Zhao, JP
Yang, SQ
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机构:Chinese Acad Sci, Shanghai Inst Met, Ion Beam Lab, Shanghai 200050, Peoples R China
Yang, SQ
Shi, TS
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机构:Chinese Acad Sci, Shanghai Inst Met, Ion Beam Lab, Shanghai 200050, Peoples R China
Shi, TS
Liu, XH
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机构:Chinese Acad Sci, Shanghai Inst Met, Ion Beam Lab, Shanghai 200050, Peoples R China
Liu, XH
Luo, EZ
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机构:Chinese Acad Sci, Shanghai Inst Met, Ion Beam Lab, Shanghai 200050, Peoples R China
Luo, EZ
Xu, JB
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机构:Chinese Acad Sci, Shanghai Inst Met, Ion Beam Lab, Shanghai 200050, Peoples R China
Xu, JB
Wilson, IH
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机构:Chinese Acad Sci, Shanghai Inst Met, Ion Beam Lab, Shanghai 200050, Peoples R China