Characterization of self-assembled thiols monolayers on gold surface by electrochemical impedance spectroscopy

Journal of the Brazilian Chemical Society

Kubota, Lauro T.¹  Universidade Estadual de Campinas, Campinas, Brazil¹  Universidade São Francisco, Itatiba, Brazil¹  Freire, Renato S.¹  Neves, Silmara¹  Fonseca, Carla P.¹  Universidade de São Paulo, São Paulo, Brazil¹  Mendes, Renata K.¹ 

关键词: self-assembled monolayer;    cyclic voltammetry;    electrochemical impedance spectroscopy;    gold electrodes;    surface modification;   

DOI  :  10.1590/S0103-50532004000600011

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

Thiols with different alkyl chain length and containing COOH terminal group were self-assembled on gold electrodes. The electron transfer of Fe(CN)63-/4- couple to the electrode was studied at different pH by means cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Changes in solution pH resulted in the charge variation of the self-assembled monolayer (SAM) terminal group and, consequently, the electrostatic interaction of SAM with the electroactive species in the solution.

【 授权许可】

Unknown