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A Sensing Platform Based on Electrodissolution of a Ag Bipolar Electrode
Chow, Kwok-Fan,Chang, Byoung-Yong,Zaccheo, Brian A.,Mavré,, Franç,ois,Crooks, Richard M. American Chemical Society 2010 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.132 No.27
<P>Here we report a new type of sensing platform that is based on electrodissolution of a metallic bipolar electrode (BPE). When the target DNA binds to the capture probe at the cathodic pole of the BPE, it triggers the oxidation and dissolution of Ag metal present at the anodic pole. The loss of Ag is easily detectable with the naked eye or a magnifying glass and provides a permanent record of the electrochemical history of the electrode. More importantly, the decrease in the length of the BPE can be directly correlated to the number of electrons passing through the BPE and hence to the sensing reaction at the cathode.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2010/jacsat.2010.132.issue-27/ja103715u/production/images/medium/ja-2010-03715u_0004.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja103715u'>ACS Electronic Supporting Info</A></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja103715u'>ACS Electronic Supporting Info</A></P>
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Design and Operation of Microelectrochemical Gates and Integrated Circuits
Chang, Byoung-Yong,Crooks, John A.,Chow, Kwok-Fan,Mavré,, Franç,ois,Crooks, Richard M. American Chemical Society 2010 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.132 No.43
<P>Here we report a simple design philosophy, based on the principles of bipolar electrochemistry, for the operation of microelectrochemical integrated circuits. The inputs for these systems are simple voltage sources, but because they do not require much power they could be activated by chemical or biological reactions. Device output is an optical signal arising from electrogenerated chemiluminescence. Individual microelectrochemical logic gates are described first, and then multiple logic circuits are integrated into a single microfluidic channel to yield an integrated circuit that can perform parallel logic functions. AND, OR, NOR, and NAND gates are described. Eventually, systems such as those described here could provide on-chip data processing functions for lab-on-a-chip devices.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2010/jacsat.2010.132.issue-43/ja107095z/production/images/medium/ja-2010-07095z_0004.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja107095z'>ACS Electronic Supporting Info</A></P>
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