Electrochemical behavior of parallel opposed dual electrode in a microchannel

Takeshi Ito, Kenichi Maruyama, Kazuharu Sobue, Seishiro Ohya, Osamu Niwa, Koji Suzuki

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

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).

Original languageEnglish
Pages (from-to)2035-2041
Number of pages7
JournalElectroanalysis
Volume16
Issue number24
DOIs
Publication statusPublished - 2004 Dec 1

Keywords

  • Cyclic voltammetry
  • Generation-collection mode
  • Microchannel
  • Parallel opposed dual electrode

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry

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