Assessment of Defects and Collapsed Sites in Self-Assembled Alkanethiol Monolayer on Gold by Cyclic Voltammetry and A.C.Impedance

Assessment of Defects and Collapsed Sites in Self-Assembled Alkanethiol Monolayer on Gold by Cyclic Voltammetry and A.C.Impedance

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摘要 Self-assembly of octadecyl mercaptan on gold was investigated by cyclic voltammetry(CV) and electrochemical impedance spectroscopy (EIS). Results of CV experiments show thatthere are no structUral defects exposed directly to the redox couple in solution, but EISexperiments indicate that collapsed sites exist in the monolayer. A method to estimate the degree ofdisorder in the Au/thiol monolayer surface is proposed by using admittance plane plot. Self-assembly of octadecyl mercaptan on gold was investigated by cyclic voltammetry(CV) and electrochemical impedance spectroscopy (EIS). Results of CV experiments show thatthere are no structUral defects exposed directly to the redox couple in solution, but EISexperiments indicate that collapsed sites exist in the monolayer. A method to estimate the degree ofdisorder in the Au/thiol monolayer surface is proposed by using admittance plane plot.

作者 Diao, P Jiang, DL Cui, XL Gu, DP Tong, RT Zhong, B

机构地区 Chinese Acad Sci Hebei Teachers Univ

出处《Chinese Chemical Letters》 SCIE CAS CSCD 1998年第12期0-0,0-0,共4页 中国化学快报（英文版）

关键词 SELF-ASSEMBLED MONOLAYER cyclic VOLTAMMETRY a.c. IMPEDANCE ideally polarizable electrode surface ROUGHNESS Self-assembled monolayer cyclic voltammetry a.c. impedance ideally polarizable electrode surface roughness

分类号 O657.1 [理学—分析化学]

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Chinese Chemical Letters

1998年第12期

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Assessment of Defects and Collapsed Sites in Self-Assembled Alkanethiol Monolayer on Gold by Cyclic Voltammetry and A.C.Impedance

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