Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (02): 468-472.doi: 10.3866/PKU.WHXB20110210

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Electrochemical Behavior of Redox Proteins on ZnO Nanorod-Modified Electrodes Prepared by Electrodeposition

HAN Nan-Nan2, WANG Hui2, LI Na2, ZHOU Jian-Zhang1,2, LIN Zhong-Hua1,2, WU Di3, WAN Guo-Jiang3   

  1. 1. State Key Laboratory of Physical Chemistry of the Solid Surface, Xiamen University, Xiamen 361005, Fujian Province, P. R. China;
    2. Department of Chemistry, College of Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, P. R. China;
    3. School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P. R. China
  • Received:2010-09-26 Revised:2010-11-12 Published:2011-01-25
  • Contact: ZHOU Jian-Zhang, WAN Guo-Jiang E-mail:jzzhou@xmu.edu.cn, superwgj@263.net
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20603027, 21021002, 20973134) and National High Technology Research and Development Program of China (2009AA03Z327)

Abstract:

We successfully prepared ZnO nanorod-modified Au (ZnO nanorod/Au) electrodes using one-step cathodic electrodeposition. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to characterize the morphology and crystal phase of the ZnO nanorods. The data showed that the ZnO nanorods were wurtzite type crystals with a hexagonal rod shape and a diameter of about 100 nm and that the ZnO nanorods were arranged well on the surface of electrodes. These ZnO nanorod-modified electrodes were able to detect direct electron transfer from cytochrome c (cyt c). Cyclic voltammograms showed that the direct electron transfer of cyt c with heme iron in different valence states was easily achieved by the ZnO nanorod/Au electrode. Data of amperometric responses demonstrated that a linear amperometric response to hydrogen peroxide was observed on the ZnO nanorod/Au electrodes after adsorbing cyt c.

Key words: ZnO nanorod, Electrodeposition, Redox protein, Cytochrome c

MSC2000: 

  • O646