Investigating the use of endogenous quinoid moieties on carbon fibre as means of developing micro pH sensors

A Anderson, J Phair, J Benson, BJ Meenan, J Davis

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The redox profile obtained from electrochemically oxidised carbon fibre was exploited as a foundation from which to design a reusable pH probe. X-ray photoelectron spectroscopy of the surface after anodisation revealed an increase in the population of endogenous quinone moieties. Square wave voltammograms recorded in various buffer solutions (pH 3–9) yielded a distinct and unambiguous oxidation process through which to ascribe the peak potential — with the latter found to shift in a sub-Nernstian (− 0.052 V/pH) manner. The design of a discrete 2-electrode reusable probe which provides a rapid assessment of pH is described and a preliminary characterisation of the electrochemical performance is critically assessed.
LanguageEnglish
Pages533-537
JournalMaterials Science and Engineering C
Volume43
DOIs
Publication statusPublished - 1 Oct 2014

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pH sensors
Buffers
X ray photoelectron spectroscopy
Oxidation
Electrodes
carbon fiber
benzoquinone
Oxidation-Reduction

Cite this

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abstract = "The redox profile obtained from electrochemically oxidised carbon fibre was exploited as a foundation from which to design a reusable pH probe. X-ray photoelectron spectroscopy of the surface after anodisation revealed an increase in the population of endogenous quinone moieties. Square wave voltammograms recorded in various buffer solutions (pH 3–9) yielded a distinct and unambiguous oxidation process through which to ascribe the peak potential — with the latter found to shift in a sub-Nernstian (− 0.052 V/pH) manner. The design of a discrete 2-electrode reusable probe which provides a rapid assessment of pH is described and a preliminary characterisation of the electrochemical performance is critically assessed.",
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Investigating the use of endogenous quinoid moieties on carbon fibre as means of developing micro pH sensors. / Anderson, A; Phair, J; Benson, J; Meenan, BJ; Davis, J.

In: Materials Science and Engineering C, Vol. 43, 01.10.2014, p. 533-537.

Research output: Contribution to journalArticle

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AU - Anderson, A

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AU - Benson, J

AU - Meenan, BJ

AU - Davis, J

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AB - The redox profile obtained from electrochemically oxidised carbon fibre was exploited as a foundation from which to design a reusable pH probe. X-ray photoelectron spectroscopy of the surface after anodisation revealed an increase in the population of endogenous quinone moieties. Square wave voltammograms recorded in various buffer solutions (pH 3–9) yielded a distinct and unambiguous oxidation process through which to ascribe the peak potential — with the latter found to shift in a sub-Nernstian (− 0.052 V/pH) manner. The design of a discrete 2-electrode reusable probe which provides a rapid assessment of pH is described and a preliminary characterisation of the electrochemical performance is critically assessed.

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