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Two-channel microelectrochemical bipolar electrode sensor array
Chang, Byoung-Yong,Chow, Kwok-Fan,Crooks, John A.,Mavré,, Franç,ois,Crooks, Richard M. The Royal Society of Chemistry 2012 The Analyst Vol.137 No.12
<P>We report a two-channel microelectrochemical sensor that communicates between separate sensing and reporting microchannels <I>via</I> one or more bipolar electrodes (BPEs). Depending on the contents of each microchannel and the voltage applied across the BPE, faradaic reactions may be activated simultaneously in both channels. As presently configured, one end of the BPE is designated as the sensing pole and the other as the reporting pole. When the sensing pole is activated by a target, electrogenerated chemiluminescence (ECL) is emitted at the reporting pole. Compared to previously reported single-channel BPE sensors, the key advantage of the multichannel architecture reported here is physical separation of the ECL reporting cocktail and the solution containing the target. This prevents chemical interference between the two channels.</P> <P>Graphic Abstract</P><P>A wireless interchannel bipolar sensor array separates sensing and reporting poles, preventing interference between the ECL reporting and the sensing chemistries. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2an35382b'> </P>