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Issue 21, 2014
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Screen-printed back-to-back electroanalytical sensors

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Abstract

We introduce the concept of screen-printed back-to-back electroanalytical sensors where in this facile and generic approach, screen-printed electrodes are printed back-to-back with a common electrical connection to the two working electrodes with the counter and reference electrodes for each connected in the same manner as a normal “traditional” screen-printed sensor would be. This approach utilises the usually redundant back of the screen-printed sensor, converting this “dead-space” into a further electrochemical sensor which results in improvements in the analytical performance. In the use of the back-to-back design, the electrode area is consequently doubled with improvements in the analytical performance observed with the analytical sensitivity (gradient of a plot of peak height/analytical signal against concentration) doubling and the corresponding limit-of-detection being reduced. We also demonstrate that through intelligent electrode design, a quadruple in the observed analytical sensitivity can also be realised when double microband electrodes are used in the back-to-back configuration as long as they are placed sufficiently apart such that no diffusional interaction occurs. Such work is generic in nature and can be facilely applied to a plethora of screen-printed (and related) sensors utilising the commonly overlooked redundant back of the electrode providing facile improvements in the electroanalytical performance.

Graphical abstract: Screen-printed back-to-back electroanalytical sensors

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Publication details

The article was received on 15 Aug 2014, accepted on 29 Aug 2014 and first published on 17 Sep 2014


Article type: Communication
DOI: 10.1039/C4AN01501K
Citation: Analyst, 2014,139, 5339-5349
  • Open access: Creative Commons BY license
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    Screen-printed back-to-back electroanalytical sensors

    J. P. Metters, E. P. Randviir and C. E. Banks, Analyst, 2014, 139, 5339
    DOI: 10.1039/C4AN01501K

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