Carbon nanotubes grown on stainless steel to form plate and probe electrodes for chemical/biological sensing

Yeo Heung Yun, Ram Gollapudil, Vesselin Shanov, Mark J. Schulz, Zhongyun Dong, Abdul Jazieh, William R. Heineman, H. Brian Halsall, Danny K Y Wong, Adam Bange, Yi Tu, Srinivas Subramaniam

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22 Citations (Scopus)

Abstract

This paper describes the fabrication and evaluation of carbon nanotube (CNT) electrodes grown on stainless steel (SS) plate and wire for electrochemical sensor applications. Multi-wall carbon nanotubes with different diameters were grown on the SS plate and wire by chemical vapor deposition from an ethylene precursor. The SS provides a good electrical and mechanical connection to the CNT, and the SS is a tough substrate. The SS part of the electrode was electrically insulated from the analyte so that only the CNT were active in sensing. Cyclic voltammetry for the reduction of 6 mM K 3Fe(CN) 6 in a 1.0 M KNO 3 supporting electrolyte was performed to examine the redox behavior of the CNT-SS electrode. The cyclic voltammograms showed sigmoidal-like shapes, indicating that mass transport around the electrodes is dominated by radial diffusion. Based on the cyclic voltammograms, the effective area of the CNT-SS electrodes and the number of individual CNTs were estimated. These results indicate that the CNT-SS plate and wire electrodes are good candidates to develop practical in vivo biosensors.

Original languageEnglish
Pages (from-to)891-897
Number of pages7
JournalJournal of Nanoscience and Nanotechnology
Volume7
Issue number3
DOIs
Publication statusPublished - Mar 2007

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    Yun, Y. H., Gollapudil, R., Shanov, V., Schulz, M. J., Dong, Z., Jazieh, A., ... Subramaniam, S. (2007). Carbon nanotubes grown on stainless steel to form plate and probe electrodes for chemical/biological sensing. Journal of Nanoscience and Nanotechnology, 7(3), 891-897. https://doi.org/10.1166/jnn.2007.217