期刊
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
卷 43, 期 -, 页码 533-537出版社
ELSEVIER
DOI: 10.1016/j.msec.2014.07.038
关键词
pH; Quinone; carbon fibre; Anodisation; Sensor
资金
- EPSRC [EP/I01179X/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/I01179X/1] Funding Source: researchfish
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. (C) 2014 Elsevier B.V. All rights reserved.
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