Simple methods for preparation of a well-defined 4-pyridinethiol modified surface on Au(111) electrodes for cytochrome c electrochemistry

Isao Taniguchi, Soichiro Yoshimoto, Masahito Yoshida, Shun Ichi Kobayashi, Toshifumi Miyawaki, Yutaka Aono, Yukinari Sunatsuki, Hideo Taira

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

A very small amount of sulfide impurity in 4-pyridinethiol (4-PySH) modifier solution was found to interfere with the proper formation of the 4-PySH modified surface for cytochrome c electrochemistry on an Au(111) electrode. When the modification was conducted in an alkaline (e.g. 0.1 M KOH) solution, in aqueous solutions under applying a potential more positive than 0.3 V vs. Ag/AgCl, or at a low modifier concentration (e.g. 20 μM), the proper 4-PySH modified surface was obtained even using 4-PySH as received, which contained a small amount of sulfide. The selective adsorption of 4-PySH in the presence of a small amount of sulfide under these conditions was due to the rapid formation of proper 4-PySH modified surface, which prevented the sulfide from reacting with the electrode surface.

Original languageEnglish
Pages (from-to)2843-2853
Number of pages11
JournalElectrochimica Acta
Volume45
Issue number18
DOIs
Publication statusPublished - Jun 9 2000
Externally publishedYes

Fingerprint

Sulfides
Electrochemistry
Cytochromes c
Proteins
Electrodes
Impurities
Adsorption
4-thiopyridine

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

Cite this

Simple methods for preparation of a well-defined 4-pyridinethiol modified surface on Au(111) electrodes for cytochrome c electrochemistry. / Taniguchi, Isao; Yoshimoto, Soichiro; Yoshida, Masahito; Kobayashi, Shun Ichi; Miyawaki, Toshifumi; Aono, Yutaka; Sunatsuki, Yukinari; Taira, Hideo.

In: Electrochimica Acta, Vol. 45, No. 18, 09.06.2000, p. 2843-2853.

Research output: Contribution to journalArticle

Taniguchi, Isao ; Yoshimoto, Soichiro ; Yoshida, Masahito ; Kobayashi, Shun Ichi ; Miyawaki, Toshifumi ; Aono, Yutaka ; Sunatsuki, Yukinari ; Taira, Hideo. / Simple methods for preparation of a well-defined 4-pyridinethiol modified surface on Au(111) electrodes for cytochrome c electrochemistry. In: Electrochimica Acta. 2000 ; Vol. 45, No. 18. pp. 2843-2853.
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