Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 143, Issue 18, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4934998
Keywords
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Funding
- Italian Ministry of University and Research through FIRB Futuro in Ricerca [RBFR12OO1G - NEMATIC]
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We analyze the electroosmotic flow (EOF) of an electrolytic solution in a polymer coated capillary electrophoresis tube. The polymeric density, charge, thickness, and the capillary tube charge vary as a function of pH and produce a non- trivial modulation of the EOF, including a flow reversal at acid pH conditions. By means of a theoretical argument and numerical simulations, we recover the experimental curve for the EOF, providing a firm approach for predictive analysis of electroosmosis under different polymeric coating conditions. A proposed application of the approach is to determine the near-wall charge of the coating to be used for further quantitative analysis of the electroosmotic flow and mobility. (C) 2015 AIP Publishing LLC.
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