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Electric field gradient focusing using a variable width polyaniline electrode


Trickett, CA and Henderson, RD and Guijt, RM and Breadmore, MC, Electric field gradient focusing using a variable width polyaniline electrode, Electrophoresis, 33, (21) pp. 3254-3258. ISSN 0173-0835 (2012) [Refereed Article]

Copyright Statement

Copyright 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

DOI: doi:10.1002/elps.201200335


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.

Item Details

Item Type:Refereed Article
Keywords:conducting polymer, electric field gradient focusing, polyaniline, stacking
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Separation science
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Trickett, CA (Mr Christopher Trickett)
UTAS Author:Henderson, RD (Mr Rowan Henderson)
UTAS Author:Guijt, RM (Dr Rosanne Guijt)
UTAS Author:Breadmore, MC (Professor Michael Breadmore)
ID Code:82679
Year Published:2012
Web of Science® Times Cited:6
Deposited By:Austn Centre for Research in Separation Science
Deposited On:2013-02-12
Last Modified:2013-04-23

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