Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 132, Issue 27, Pages 9228-9229Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja103715u
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Funding
- U.S. Army Research Office [W911NF-07-1-0330]
- U.S. Defense Threat Reduction Agency
- Robert A. Welch Foundation [F-0032]
- Korean Government [KRF-2008-357-000091]
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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.
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