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標題: A nonenzymatic glucose sensor using nanoporous platinum electrodes prepared by electrochemical alloying/dealloying in a water-insensitive zinc chloride-1-ethyl-3-methylimidazolium chloride ionic liquid
作者: Chou, C.H.
Chen, J.C.
Tai, C.C.
Sun, I.W.
Zen, J.M.
關鍵字: glucose;porous platinum;nonenzymatic sensor;ionic liquid;mesoporous platinum;nanostructured platinum;molten-salt;microelectrodes;oxidation;films;electrooxidation;templates;mixtures;kinetics
Project: Electroanalysis
期刊/報告no:: Electroanalysis, Volume 20, Issue 7, Page(s) 771-775.
We report here a nonenzymatic sensor by using a nanoporous platinum electrode to detect glucose directly. The electrode was fabricated by electrochemical deposition and dissolution of PtZn alloy in zinc chloride-1-ethyl-3-methylimidazolium chloride (ZnCl2-EMIC) ionic liquid. Both SEM and electrochemical studies showed the evidences for the nanoporous characteristics of the as-prepared Pt electrodes. Amperometric measurements allow observation of the electrochemical oxidation of glucose at 0.4 V (vs. Ag/AgCl) in pH 7.4 phosphate buffer solution. The sensor also demonstrates significant reproducibility in glucose detection; the higher the roughness factor of the Pt electrode, the lower the detection limit of glucose. The interfering species such as ascorbic acid and p-acetamidophenol can be avoided by using a Pt electrode with a high roughness factor of 151. Overall, the nanoporous Pt electrode is promising for enzymeless detection of glucose at physiological condition.
ISSN: 1040-0397
DOI: 10.1002/elan.200704102
Appears in Collections:化學系所

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