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Keyword Author: Electrophoresis

Graphene based nanomaterials as electrochemical detectors in Lab-on-a-chip devices

Graphene related materials have received significant attention as new and advantageous materials for electrochemistry. Here we present an evaluation of graphene oxide amperometric detectors in microfluidics devices and we compare the results to those obtained at graphite microparticles and bare glassy carbon electrodes. We evaluate the influence on peak currents (sensitivity) and peak width (resolution …

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New materials for electrochemical sensing VII. Microfluidic chip platforms

This overview covers important aspects of microfluidic chip platforms as new materials for electrochemical (EC) sensing. It describes important trends in constructing detectors and their electronics on microfluidic chip platforms, the importance of selecting appropriate detector materials, and the different detection modes in on-chip amperometry, conductometry and potentiometry. We pay particular attention to the latest …

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Thick-film electrochemical detectors for poly(dimethylsiloxane)based microchip capillary electrophoresis

A new poly(dimethylsiloxane) (PDMS)-based microchip capillary electrophoresis (CE) device, with a thick-film electrochemical detector, is described. The end-column design relies on screen-printing the amperometric carbon working electrode on the base plate of a PDMS microchip (opposite to the exit of the microchannel). Since the channel depth and electrode height are quite similar, this is a …

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