Solubilization of Carbon Nanotubes by Nafion toward the Preparation of Amperometric Biosensors

详细信息    查看全文

• 作者：Joseph Wang ; Mustafa Musameh ; and Yuehe Lin
• 刊名：Journal of the American Chemical Society
• 出版年：2003
• 出版时间：March 5, 2003
• 年：2003
• 卷：125
• 期：9
• 页码：2408 - 2409
• 全文大小：94K
• 年卷期：v.125,no.9(March 5, 2003)
• ISSN：1520-5126

文摘

The ability to solubilize single-wall and multiwall carbon nanotubes (CNT) in the presence of the perfluorinated polymer Nafion is described. Such use of Nafion as a solubilizing agent for CNT overcomes a major obstacle for creating CNT-based biosensing devices. Their association with Nafion does not impair the electrocatalytic properties of CNT. The resulting CNT/Nafion modified glassy-carbon electrodes exhibit a strong and stable electrocatalytic response toward hydrogen peroxide. The marked acceleration of the hydrogen peroxide redox process is very attractive for the operation of oxidase-based amperometric biosensors, as illustrated for the highly selective low-potential (-0.05 V vs Ag/AgCl) biosensing of glucose. These findings open the door for using CNT in a wide range of chemical sensors and nanoscale electronic devices.