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Electrochemical Detection of Nitric Oxide on a SWCNT/RTIL Composite Gel Microelectrode
Author(s) -
Li Chang Ming,
Zang Jianfeng,
Zhan Dongping,
Chen Wei,
Sun Chang Q.,
Teo Ai. L.,
Chua Yek. T.,
Lee Vee. S.,
Moochhala Shabbir. M.
Publication year - 2006
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200503457
Subject(s) - microelectrode , carbon nanotube , materials science , electrode , nafion , electrochemistry , ionic liquid , chemical engineering , coating , amperometry , layer (electronics) , inorganic chemistry , nanotechnology , chemistry , organic chemistry , catalysis , engineering
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.