A simple method to fabricate electrochemical sensor systems with predictable high-redox amplification

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Straver, M.G. and Odijk, M. and Olthuis, W. and Berg van den, A. (2012) A simple method to fabricate electrochemical sensor systems with predictable high-redox amplification. Lab on a Chip, 12 (8). pp. 1548-1553. ISSN 1473-0197

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Abstract:In this paper an easy to fabricate SU8/glass-based microfluidic sensor is described with two closely spaced parallel electrodes for highly selective measurements using the redox cycling effect. By varying the length of the microfluidic entrance channel, a diffusion barrier is created for non-cycling species effectively increasing selectivity for redox cycling species. Using this sensor, a redox cycling amplification of similar to 6500x is measured using the ferrocyanide redox couple. Moreover, a simple, but accurate analytical expression is derived that predicts the amplification factor based on the sensor geometry.
Item Type:Article
Copyright:© 2012 Royal Society of Chemistry
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/80518
Official URL:http://dx.doi.org/10.1039/c2lc21233a
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Metis ID: 286388