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Thermodynamic and Kinetic Enhancement of Electrochemical Sensitivity by Chemical Coupling in Microfluidic Systems

✍ Scribed by Imtiaz M. Khalid; Qiaosheng Pu; Julio C. Alvarez

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
159 KB
Volume
118
Category
Article
ISSN
0044-8249

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✦ Synopsis

Herein, we report the enhancement of electrochemical sensitivity by chemical coupling of two independent reactions in a microfluidic channel. Scheme 1 illustrates the general concept of this approach: an upstream electrode (E 1 ) drives a reaction that produces protons while a downstream electrode (E 2 ) conducts a second reaction that consumes protons. The reactions are chemically coupled by the electrogenerated protons, which are used to harness thermodynamically or kinetically the reaction at E 2 . Herein, we show two examples of a positive shift in the redox potential (E8') of an analyte in

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