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Issue 9, 2016
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Can the mechanical activation (polishing) of screen-printed electrodes enhance their electroanalytical response?

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Abstract

The mechanical activation (polishing) of screen-printed electrodes (SPEs) is explored and shown to exhibit an improved voltammetric response (in specific cases) when polished with either commonly available alumina slurry or diamond spray. Proof-of-concept is demonstrated for the electrochemical sensing of nitrite where an increase in the voltammetric current is found using both polishing protocols, exhibiting an improved limit of detection (3σ) and a two-fold increase in the electroanalytical sensitivity compared to the respective un-polished counterpart. It is found that mechanical activation/polishing increases the C/O ratio which significantly affects inner-sphere electrochemical probes only (whereas outer-sphere systems remain unaffected). Mechanical activation/polishing has the potential to be a simple pre-treatment technique that can be extended and routinely applied towards other analytes for an observable improvement in the electroanalytical response.

Graphical abstract: Can the mechanical activation (polishing) of screen-printed electrodes enhance their electroanalytical response?

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Publication details

The article was received on 23 Jan 2016, accepted on 04 Feb 2016 and first published on 04 Feb 2016


Article type: Paper
DOI: 10.1039/C6AN00167J
Analyst, 2016,141, 2791-2799
  • Open access: Creative Commons BY license
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    Can the mechanical activation (polishing) of screen-printed electrodes enhance their electroanalytical response?

    L. R. Cumba, C. W. Foster, D. A. C. Brownson, J. P. Smith, J. Iniesta, B. Thakur, D. R. do Carmo and C. E. Banks, Analyst, 2016, 141, 2791
    DOI: 10.1039/C6AN00167J

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