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Indexed by:期刊论文

Date of Publication:2013-06-01

Journal:ELECTROCHEMISTRY COMMUNICATIONS

Included Journals:SCIE、EI

Volume:31

Page Number:20-23

ISSN No.:1388-2481

Key Words:Microelectrode; Microchip; Electrochemical detection; PMMA

Abstract:Monolithic integration of three-material microelectrodes for electrochemical detection on poly (methyl methacrylate) (PMMA) substrates is presented. Au-Ag-Pt three-material electrodes were all fabricated based on polymer compatible photolithography processes, and the fabrication sequence of the electrodes was optimized. The C-Ag-Pt three-electrode system was also demonstrated. To reduce the electrical resistance, the carbon electrode was made on a silver intermediate layer which was simultaneously fabricated with Ag electrodes. A PMMA/poly(dimethylsiloxane) electrochemical sensing microchip with the Au-Ag-Pt three-electrode systems was constructed. The reproducibility of the three-electrode system from single and different microchips was characterized. The performance of the microchip was evaluated by two kinds of electrochemical probes (Ru(bPY)(3)Cl-2 and dopamine). (c) 2013 Elsevier B.V. All rights reserved.