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Direct Electrochemistry of Cytochrome c at a Metallothioneins Self‐Assembled Gold Electrode
Author(s) -
Wang Qian,
Li Nanqiang,
Wu Yonghui
Publication year - 2001
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200102)13:2<149::aid-elan149>3.0.co;2-3
Subject(s) - electrode , cytochrome c , electrochemistry , cyclic voltammetry , analytical chemistry (journal) , monolayer , chemistry , redox , standard hydrogen electrode , aqueous solution , working electrode , inorganic chemistry , organic chemistry , biochemistry , mitochondrion
Horse heart cytochrome c was studied by cyclic voltammetry using a gold electrode self‐assembled with the metallothioneins monolayer (MT/Au) as working electrode. A pair of well‐defined redox waves was obtained as the MT SAM‐modified gold electrode in a cytochrome c aqueous solution. The calculated standard rate constant ( k s ) is 2.43×10 −3 cm s −1 . The electrode reaction is a pseudo‐reversible process. The peak current and the concentration of cytochrome c have a linear relationship in the range of 2.0×10 −5 mol L −1 to 4.0×10 −4 mol L −1 . The detection limit is 2.0×10 −5 mol L −1 . The surface roughness factor of the Au electrode is 2.59. The MT SAM was characterized with X‐ray photoelectron spectroscopy (ARXPS).