標題: An electrochemical dopamine sensor with a CMOS detection circuit
作者: Chan, Feng-Lin
Chang, Wen-Ying
Kuo, Li-Min
Lin, Chih-Heng
Wang, Shi-Wei
Yang, Yuh-Shyong
Lu, Michael S-C
生物科技學系
Department of Biological Science and Technology
公開日期: 1-Jul-2008
摘要: This paper presents the integration of interdigitated microelectrodes and a CMOS circuit for electrochemical sensing of the neurotransmitter dopamine. Gold electrodes with a gap of 3 mu m are fabricated by the lift-off technique. The CMOS sensing circuit has a current gain of 10, an integrating capacitor of 4 pF, and a measured dynamic range of 60 dB. The applied reduction and oxidation potentials are determined by voltammetry at about -0.2 V and 0.6 V, respectively. The measured collection efficiency can reach up to 84%. The produced oxidation current with respect to dopamine concentration averages 0.44 nA mu M(-1).
URI: http://dx.doi.org/10.1088/0960-1317/18/7/075028
http://hdl.handle.net/11536/8669
ISSN: 0960-1317
DOI: 10.1088/0960-1317/18/7/075028
期刊: JOURNAL OF MICROMECHANICS AND MICROENGINEERING
Volume: 18
Issue: 7
結束頁: 
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