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

journal contribution
posted on 01.12.2005, 00:00 authored by L Heng, A Chou, J Yu, Ying (Ian) ChenYing (Ian) Chen, J Gooding
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.

History

Journal

Electrochemistry communications

Volume

7

Issue

12

Pagination

1457 - 1462

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

1388-2481

eISSN

1873-1902

Language

eng

Notes

Available online 9 November 2005.

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2005, Elsevier B.V.