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.
Original language | Undefined |
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Pages (from-to) | 1548-1553 |
Number of pages | 6 |
Journal | Lab on a chip |
Volume | 12 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2012 |
Keywords
- EWI-21916
- METIS-286388
- IR-80518