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Electrochemical Behavior of Parallel Opposed Dual Electrode in a Microchannel
Author(s) -
Ito Takeshi,
Maruyama Kenichi,
Sobue Kazuharu,
Ohya Seishiro,
Niwa Osamu,
Suzuki Koji
Publication year - 2004
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200303055
Subject(s) - microchannel , chronoamperometry , electrode , materials science , cyclic voltammetry , surface micromachining , analytical chemistry (journal) , photoresist , linear sweep voltammetry , electrochemistry , optoelectronics , nanotechnology , chemistry , chromatography , medicine , alternative medicine , pathology , fabrication , layer (electronics)
The electrochemical behavior dependent on the microchannel depth is discussed using a parallel opposed dual electrode in the microchip. The microchannel depth was controlled easily by the thickness of the photoresist. Cyclic voltammetry (CV) was carried out with conventional mode and the generation‐collection mode. High collection efficiency (max: 98%) and high current amplification (max: 5.2) were achieved without miniaturizing the dual electrode by micromachining techniques, when the microchip with the microchannel depth of 30 μm was used in the generation‐collection mode at low sweep rates. Quantitative analysis was applied to electrochemically reversible species with a quicker response time of around a few seconds for the same microchannel depth on chronoamperometry (CA). We observed good linearity on the calibration plot of dopamine (2×10 −6 – ca. 1×10 −3 mol dm −3 ).