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.
|Number of pages||11|
|Publication status||Published - 2004 Dec 1|
|Event||Chemical Sensors VI: Chemical and Biological Sensors and Analytical Methods - Proceedings of the International Symposium - Honolulu, HI, United States|
Duration: 2004 Oct 3 → 2004 Oct 8
|Other||Chemical Sensors VI: Chemical and Biological Sensors and Analytical Methods - Proceedings of the International Symposium|
|Period||04/10/3 → 04/10/8|
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