Direct electrochemistry behavior of Cytochrome c on silicon dioxide nanoparticles-modified electrode
Data(s) |
2007
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Resumo |
A newfangled direct electrochemistry behavior of Cytochrome c (Cyt c) was found on glassy carbon (GC) electrode modified with the silicon dioxide (SiO2) nanoparticles by physical adsorption. A pair of stable and well-defined redox peaks of Cyt c ' quasi-reversible electrochemical reaction were obtained with a heterogeneous electron transfer rate constant of 1.66 x 10(-3) cm/s and a formal potential of 0.069 V (vs. Ag/AgCl) (0.263 V versus NHE) in 0.1 mol/L pH 6.8 PBS. Both the size and the amount of SiO2 nanoparticles could influence the electron transfer between Cyt c and the electrode. Electrostatic interaction which is between the negative nanoparticle surface and positively charged amino acid residues on the Cyt c surface is of importance for the stability and reproducibility toward the direct electron transfer of Cyt c. It is suggested that the modification of SiO2 nanoparticles proposes a novel approach to realize the direct electrochemistry of proteins. |
Identificador | |
Idioma(s) |
英语 |
Fonte |
Zhu L;Sun DM;Lu TH;Cai CX;Liu CP;Xing W.Direct electrochemistry behavior of Cytochrome c on silicon dioxide nanoparticles-modified electrode,SCIENCE IN CHINA SERIES B-CHEMISTRY ,2007 ,50(3):304-307 |
Palavras-Chave | #GLUCOSE-OXIDASE #CARBON NANOTUBES #IMMOBILIZATION #PROTEINS #FILMS |
Tipo |
期刊论文 |