Microchip free-flow electrophoresis on glass substrate using laser-printing toner as structural material

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Journal Article
Electrophoresis, 2006, 27 (24), pp. 4935 - 4942
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In this work, a microfluidic free-flow electrophoresis device, obtained by thermal toner transferring on glass substrate, is presented. A microdevice can be manufactured in only 1 h. The layout of the microdevice was designed in order to improve the fluidic and electrical characteristics. The separation channel is 8 μm deep and presents an internal volume of 1.42 μL. The deleterious electrolysis effects were overcome by using a system that isolates the electrolysis products from the separation channel. The Joule heating dissipation in the separation channel was found to be very efficient up to a current density of 8.83 mA/mm2 that corresponds to a power dissipation per unit volume of running electrolyte of 172 mW/μL. Promising results were obtained in the evaluation of the microdevices for the separation of ionic dyes. The microfluidic device can be used for a continuous sample pretreatment step for micro total analysis system. © 2006 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
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