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Electric field gradient focusing using a variable width polyaniline electrode
journal contributionposted on 2023-05-17, 15:59 authored by Trickett, CA, Henderson, RD, Rosanne Guijt, Michael BreadmoreMichael Breadmore
A new approach for electric field gradient focusing (EFGF) based on the use of a variable-width polyaniline (PANI) electrode is demonstrated. The electrode was created by patterning a PANI nanofibre film using a 635-nm laser and a computer-controlled XY stage. The electrode consisted of 16 segments of varying width, ranging from 200 to 5000 μm in 320 μm increments, with the resistance changing approximately 20-fold from 3881 to 198 kΩ at each extreme, respectively. Application of a voltage across the electrode established a voltage gradient resulting in a non-linear distribution of electrophoretic velocities along the microchannel. When balanced with a combination of hydrodynamic flow and EOF, the variable-width PANI electrode could be used for the concentration and separation of two cationic dyes, rhodamine 6G and quinine, which were concentrated by at least threefold within 10 min.
Department/SchoolSchool of Natural Sciences
PublisherWiley-V C H Verlag Gmbh
Place of publicationPo Box 10 11 61, Weinheim, Germany, D-69451
Rights statementCopyright 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim