%0 Journal Article
%T Self-assembled monolayers of pyridylthio-functionalized carbon nanotubes used as a support to immobilize cytochrome c
%A Qing Sun
%A Jiang Liu
%A Hong-Xiang Huang
%A Meng Chen and Dong-Jin Qian
%J Nanoscale Research Letters
%D 2013
%I 
%R 10.1186/1556-276X-8-63
%X Self-assembled monolayers (SAMs) of pyridylthio-functionalized multiwalled carbon nanotubes (pythio-MWNTs) have been constructed on the gold substrate surface, which were used as a support to immobilize cytochrome c (Cyt c). The assembly processes of the SAMs and adsorption of Cyt c were monitored by using quartz crystal microbalance (QCM). Based on the frequency change of the QCM resonator, the surface coverage for the SAMs of pythio-MWNTs was estimated to be about 5.2 ¦Ìg/cm2, and that of the Cyt c adsorbed was about 0.29 ¦Ìg/cm2. For the gold electrode modified by the SAMs of pythio-MWNTs-Cyt c, a quasi-reversible redox wave was recorded with the cathodic and anodic potentials at about  0.55 and  0.28 V vs Ag/AgCl, respectively. Compositions and morphologies of the SAMs before and after immobilization of Cyt c were characterized by X-ray photoelectron spectroscopy, Raman spectroscopy, scanning electron microscopy, and atomic force microscopy.
%K Carbon nanotube
%K Self-assembled monolayer
%K Protein
%K Adsorption
%K Morphology
%U http://www.nanoscalereslett.com/content/8/1/63/abstract