Biomolecules-carbon nanotubes doped conducting polymer nanocomposites and their sensor application
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- 作者：Maxwell C. Kum ; Kanchan A. Joshi ; Wilfred Chen ; Nosang V. Myung ; Ashok Mulch ; ani
- 关键词：Carbon nanotubes ; Biomolecule ; Conducting polymer ; Polypyrrole ; Nanocomposite ; Biosensor
- 刊名：Talanta
- 出版年：2007
- 出版时间：15 December 2007
- 年：2007
- 卷：74
- 期：3
- 页码：370-375
- 全文大小：1004 K
文摘
A simple method for preparing bio-functionalized soluble single-walled carbon nanotubes (SWNTs) is described. Different proteins such as bovine serum albumin (BSA), cytochrome c and horseradish peroxidase (HRP) were used to solubilize low functionality SWNTs in water aided by sonication. The unbound proteins were removed by column chromatography and the SWNT-protein conjugate was used as the sole anionic dopant in electropolymerization of polypyrrole from polymerization solution at pH above the isoelectric point of the protein to provide a negative charge. The morphology of the polypyrrole with SWNT-protein dopant was found to be three-dimensional and fibrous with wide open interlocking pores in contrast to smooth and cauliflower-like for chloride doped polypyrrole. Enhanced sensor performance was demonstrated for hydrogen peroxide detection on polypyrrole/SWCNT-HRP nanocomposites modified electrode. Such nanocomposites can be potentially applied for other biosensor and bio-fuel cell applications.