Demonstration of the advantages of using bamboo-like nanotubes for electrochemical biosensor applications compared with single walled carbon nanotubes

被引:82
作者
Heng, LY
Chou, A
Yu, J
Chen, Y
Gooding, JJ [1 ]
机构
[1] Univ New S Wales, Sch Chem, Sydney, NSW 2052, Australia
[2] Univ Kebangsaan Malaysia, Fac Sci & Technol, Sch Chem Sci & Food Technol, Bangi 43600, Selangor DE, Malaysia
[3] Australian Natl Univ, Res Sch Phys Sci & Engn, Dept Elect Mat Engn, Canberra, ACT 0200, Australia
基金
澳大利亚研究理事会;
关键词
D O I
10.1016/j.elecom.2005.10.007
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The modification of glassy carbon electrodes with random dispersions of nanotubes is currently the Most popular approach to the preparation of carbon nanotube modified electrodes. The performance of glassy carbon electrodes modified with a random dispersion of bamboo type carbon nanotubes was compared with single walled carbon nanotubes modified glassy carbon electrodes and bare glassy carbon electrodes. The electrochemical performance of all three types for electrode were compared by investigating the electrochemistry with solution species and the oxidation of guanine and adenine bases of surface adsorbed DNA. The presence of edge planes of graphene at regular intervals along the walls of the bamboo nanotubes resulted in superior electrochemical performance relative to SWNT modified electrodes from two aspects. Firstly, with solution species the peak separation of the oxidation and reduction waves were smaller indicating more rapid rates of electron transfer. Secondly, a greater number of electroactive sites along the walls of the bamboo-carbon nanotubes (BCNTs) resulted in larger Current signals and a broader dynamic range for the oxidation of DNA bases. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:1457 / 1462
页数:6
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