Silicon nanotube array/gold electrode for direct electrochemistry of cytochrome c

被引:69
作者
Mu, Cheng [1 ]
Zhao, Qiang [1 ]
Xu, Dongsheng [1 ]
Zhuang, Qiankun [1 ]
Shao, Yuanhua [1 ]
机构
[1] Peking Univ, Coll Chem & Mol Engn, State Key Lab Struct Chem Unstable & Stable Speci, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China
关键词
D O I
10.1021/jp0657944
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The highly ordered Si nanotube (SiNT) arrays have been fabricated and demonstrated to be an attractive matrix to accommodate macromolecules, such as proteins, and exhibit facile direct electrochemistry of cytochrome c without any pretreatment. A pair of well-defined redox waves can be observed in the aqueous solution containing cytochrome c on this SiNT electrode using cyclic voltammetry. The peak separation (Delta E-p) between the anodic and the cathodic peaks is 63 mV at the sweep rate of 10 mV/s, and the peak current is proportional to the square root of the sweep rates, which indicates that the redox process is a quasi-reversible process. The experimental results show that the good biocompatibility and nanoscale hollow structure of the SiNT arrays can be applicable to preparing Si-based biosensors and protein characterizations.
引用
收藏
页码:1491 / 1495
页数:5
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