RUI: Electrically Controlled Formation and Release of Admicelles for Solid Phase Extraction

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With support from the Chemical Measurement and Imaging Program in the Chemistry Division, Profs. Eric Conte and Stuart Burris and their groups at Western Kentucky University are studying the chemistry affecting electrically-controlled adsorption of surfactants on various conductive metal surfaces. Under conditions when the surfactant is held onto the conductive surface, the system will be devised to serve as an alternative approach to preconcentration for organic substances, whereby the surfactant acts as an adsorbing phase. The surfactant, together with the trapped material, will then be released by changing the electric field. If release by electrical control proves efficient, the organic solvents used in conventional preconcentration procedures will not be required, making this procedure environmentally advantageous. This is an intrinsically "green" chemistry program, in the sense that it may provide an effective way to reduce the use of toxic solvents. The work has additional impact in that it entails multidisciplinary training for Masters and undergraduate students, particularly those from underrepresented groups (minorities and Appalachia) in Kentucky. Students will gain valuable hands-on experience in Electrochemical Impedance Spectroscopy, Atomic Force Microscopy and High Performance Liquid Chromatography. The work is synergistic with Dr. Conte's Taiwanese student exchange and collaboration, supported separately by the Office of International Science and Engineering.