Electrochemical response dependent with composition of parallel opposed dual electrode and flow rate in a microchannel

Takeshi Ito, Kenichi Maruyama, Osamu Niwa, Koji Suzuki

Research output: Contribution to conferencePaper

Abstract

We proposed an electrochemical microsystem based on a parallel opposed dual electrochemical detector in a microchannel and studied its properties using potassium ferrocyanide for flow analysis with dual mode cyclic voltammetry (CV) and chronoamperometry (CA). Electrode gap was defined by the channel depth (50 μm). Using our microchip, a highly collection efficiency (Max: 99%) was achieved without miniaturizing the dual electrode by micromachining techniques, when the potential sweep rate was set to 10 mV s-1 without the continuous flow. We also obtained the higher collection efficiency of nearly 100% with a quicker response time of around a few seconds on chronoamperometry (CA). Current amplification contributed to redox cycling was observed.

Original languageEnglish
Pages289-299
Number of pages11
Publication statusPublished - 2004 Dec 1
EventChemical Sensors VI: Chemical and Biological Sensors and Analytical Methods - Proceedings of the International Symposium - Honolulu, HI, United States
Duration: 2004 Oct 32004 Oct 8

Other

OtherChemical Sensors VI: Chemical and Biological Sensors and Analytical Methods - Proceedings of the International Symposium
CountryUnited States
CityHonolulu, HI
Period04/10/304/10/8

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Ito, T., Maruyama, K., Niwa, O., & Suzuki, K. (2004). Electrochemical response dependent with composition of parallel opposed dual electrode and flow rate in a microchannel. 289-299. Paper presented at Chemical Sensors VI: Chemical and Biological Sensors and Analytical Methods - Proceedings of the International Symposium, Honolulu, HI, United States.