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Participants/Project Abstracts

Summer 2006 Bioanalytical Science REU Participants

Alexandra Marinez, University of Puerto Rico - Mayaguez

NANOENGINEERED ELECTRODE FOR BIOSENSOR AND BIOFUEL CELL

Department of Chemical and Environmental Engineering, University of California - Riverside, UCR 92521, Dept. of Chemical Engineering, University of Puerto Rico - Mayaguez, PR 00681

Due to their high application in devices such as enzyme-based biosensors and biological fuel cells, methods for the fabrication of nanoengineered electrodes are under much investigation. A gold nanoengineered electrode was fabricated by electrodepositing 40 m m long and 200 nm diameter gold nanowires to form a nanobrush inside the pores of an alumina template (Anodisc, Whatman). Prior to electrodeposition, gold thin films were sputtered for 15 rounds on one side of an alumina nanotemplate to serve as the seed layer. After electrodeposition of gold nanowires for 40 minutes and etching of alumina nanotemplate in sodium hydroxide (NaOH) for two days, the electrode was used to amperometrically detect hydrogen peroxide (H2O2), the product of glucose oxidase catalyzed conversion of glucose, in phosphate buffer saline. Successful detection of H2O2 was achieved demonstrating the potential for the electrode application in detection of glucose in combination of free or immobilized glucose oxidase.

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