Fuel cell-powered microfluidic platform for lab-on-a-chip applications: Integration into an autonomous amperometric sensing device

The present paper reports for the first time the integration of a microfluidic system, electronics modules, amperometric sensor and display, all powered by a single micro direct methanol fuel cell. In addition to activating the electronic circuitry, the integrated power source also acts as a tuneabl...

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Bibliographic Details
Published in:Lab on a chip 2012-11, Vol.12 (21), p.4232-4235
Main Authors: Esquivel, J P, Colomer-Farrarons, J, Castellarnau, M, Salleras, M, del Campo, F J, Samitier, J, Miribel-Català, P, Sabaté, N
Format: Article
Language:English
Subjects:
Autonomous
Electrical measurements
Electrochemical Techniques - instrumentation
Electrodes
Electronics
Fuel cells
Methanol - chemistry
Methyl alcohol
Microfluidic Analytical Techniques - instrumentation
Microfluidics
Sensing devices
Sensors
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Summary:The present paper reports for the first time the integration of a microfluidic system, electronics modules, amperometric sensor and display, all powered by a single micro direct methanol fuel cell. In addition to activating the electronic circuitry, the integrated power source also acts as a tuneable micropump. The electronics fulfil several functions. First, they regulate the micro fuel cell output power, which off-gas controls the flow rate of different solutions toward an electrochemical sensor through microfluidic channels. Secondly, as the fuel cell powers a three-electrode electrochemical cell, the electronics compare the working electrode output signal with a set reference value. Thirdly, if the concentration measured by the sensor exceeds this threshold value, the electronics switch on an integrated organic display. This integrated approach pushes forward the development of truly autonomous point-of-care devices relying on electrochemical detection.
ISSN:1473-0197
1473-0189
DOI:10.1039/c2lc40946a