TITLE:
Electrochemical investigation on the film of L-cysteine self-assembled to nanoparticles on a gold electrode
AUTHORS:
Wenting Wang, Chunming Wang, Xiaoquan Lu
KEYWORDS:
SECM; L-Cysteine; Hydroquinone; Self-Assembled Monolayers; Heterogeneous Rate Constant
JOURNAL NAME:
Journal of Biophysical Chemistry,
Vol.3 No.1,
February
15,
2012
ABSTRACT: The film contained L-cysteine and gold nanoparticles were provided by self-assembled monolayers (SAMs) and potentiostatic electrodeposition technology on the gold electrode. Two methods were used to study the film: In the first, cyclic voltammetry (CV) was used to inspect the functional groups of the film and the same time hydroquinone was chosen to be a probe molecule in the based solution; secondly, based on analytical technology of scanning electrochemical microscopy (SECM), the heterogeneous rate constant (keff) between solid phase (the modified electrode) and liquid phase (K3Fe(CN)6) was obtained. As a result, the better binary catalysis of hydroquinone was demonstrated and the heterogeneous rate constant (keff) is the greater at 8 h for L-cysteine self-assembled monolayers (SAMs).