title: Use of surface plasmon resonance to study the adsorption of detergents on poly(dimethylsiloxane) surfaces.
abstract: 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.
authors: Department of Chemistry and Biochemistry, California State University, Los Angeles, CA 90032-8202, USA.
authors: Attila
authors: A
authors: Gaspar
authors: Adam
authors: A
authors: Kecskemeti
authors: Frank A
authors: FA
authors: Gomez
mesh_terms: D000327:Adsorption; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry; D003902:Detergents / Q000737:chemistry*; D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D019075:Electrophoresis, Capillary / Q000295:instrumentation*; D012822:Silicon Dioxide / Q000737:chemistry; D012967:Sodium Dodecyl Sulfate; D020349:Surface Plasmon Resonance / Q000379:methods*
chemical_list: D002593:Cetrimonium Compounds; D003902:Detergents; D004129:Dimethylpolysiloxanes; D012967:Sodium Dodecyl Sulfate; C013830:baysilon; D012822:Silicon Dioxide; D000077286:Cetrimonium