An Electrochemical Mercuric Ion Sensor Based on CdS Nanparticle Label

Abstract:

In the present study, we describe an electrochemical sensor for Hg2+ detection by using the DNA probe. Two specific sequence for the probes, one has to ensure that the probe A hybridized with probe B modified on CdS nanoparticle to form stable DNA duplexes only in the presence of Hg2+ at a given operating temperature. After dissolving the CdS particles from the electrode, a mercury-film electrode was used for electrochemical detection of these Cd2+ ions which offered sensitive electrochemical signal transduction.The limit of detection of this assay in buffer is 12 nM. The detection was also specific for Hg2+ without being affected by the other metal ions, such as Cd2+,Li+,Ba2+,K+,Ca2+.

• Periodical: Advanced Materials Research (Volumes 945-949)
• Pages: 2009-2012
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.945-949.2009
• Online since: June 2014
• Authors: Hao Fan*, Fu Sheng Liao, Guo Bing Wei, Nian Hong
• Keywords: CdS Nanoparticles, Electrochemical Sensor, Mercuric Ion, T-T Mismatches

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