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Electric field gradient focusing using a variable width polyaniline electrode
journal contribution
posted on 2023-05-17, 15:59 authored by Trickett, CA, Henderson, RD, Rosanne Guijt, Michael BreadmoreMichael BreadmoreA 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.
History
Publication title
ElectrophoresisVolume
33Issue
21Pagination
3254-3258ISSN
0173-0835Department/School
School of Natural SciencesPublisher
Wiley-V C H Verlag GmbhPlace of publication
Po Box 10 11 61, Weinheim, Germany, D-69451Rights statement
Copyright 2012 WILEY-VCH Verlag GmbH & Co. KGaA, WeinheimRepository Status
- Restricted