Electrochemical Detection of Nitric Oxide on a SWCNT/RTIL Composite Gel Microelectrode
✍ Scribed by Chang Ming Li; Jianfeng Zang; Dongping Zhan; Wei Chen; Chang Q. Sun; Ai. L. Teo; Yek. T. Chua; Vee. S. Lee; Shabbir. M. Moochhala
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 136 KB
- Volume
- 18
- Category
- Article
- ISSN
- 1040-0397
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✦ Synopsis
Abstract
Single walled carbon nanotubes (SWCNT) and room temperature ionic liquid (RTIL) were used to make a gel microelectrode for studies of the oxidation of nitric oxide (NO). The Faraday response of the gel microelectrode was contributed from two components: an outside‐surface microdisk and a thin‐layer cell formed by inner porous electrode materials, and enhanced by the thin‐layer effect. An EC mechanism, electrochemical NO oxidation followed by a chemical oxidation, was proposed. The gel microelectrode with a Nafion coating eliminated interferences from nitrite and some biomolecules, improved stability, and had a linear response range from 100 nM to 100 μM.