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Use of surface plasmon resonance to study the adsorption of detergents on poly(dimethylsiloxane) surfaces
Author(s) -
Gaspar Attila,
Kecskemeti Adam,
Gomez Frank A.
Publication year - 2013
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.201200573
Subject(s) - adsorption , surface plasmon resonance , desorption , layer (electronics) , materials science , chemical engineering , coating , surface plasmon , resonance (particle physics) , chemistry , plasmon , nanotechnology , organic chemistry , nanoparticle , optoelectronics , physics , particle physics , engineering
This paper demonstrates the use of surface plasmon resonance to study adsorption (either reversible or irreversible) of detergents on PDMS surfaces in real time. The surface plasmon resonance measurements can directly provide information about the adsorption/desorption processes of detergents on the surface revealing the durability of the adsorbed layer and the anticipated degree of the EOF. Hydroxypropyl methylcellulose very strongly adsorbs onto PDMS and can be considered both a semipermanent layer and stable semipermanent coating. Adsorbed SDS or CTAB layers were stable for several minutes upon rinsing the surface with solution not containing the detergent. It was shown that SDS coated onto PDMS in microchips has the potential to afford similar separations in PDMS as found in conventional fused silica capillaries.