Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 10, Issue 6, Pages 872-875Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2008.03.013
Keywords
DNA functionalized single-walled carbon nanotube hybrids; DNA biosensor in a nearly physiological pH environment; redox process; the detection of arsenic(III)
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Based on layer-by-layer assembled DNA functionalized single-walled carbon nanotube hybrids, a DNA biosensor for the detection of arsenic(III) in a nearly physiological pH environment was developed. The redox process between arsenic(Ill) and arsenic(0) on the biosensor was proved. The growth of those hybrids on glassy carbon electrode was monitored by detecting arsenic(III). The arsenic(Ill) current on the biosensor was similar over a broad pH range (3.0-8.0) and the limit of detection (S/N= 3) was 0.05 mu g L-1 at pH 7.0. The biosensor can be reused up to 16 times. (c) 2008 Elsevier B.V. All rights reserved.
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