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Redox Couple of DNA on Multiwalled Carbon Nanotube Modified Electrode
Author(s) -
Luo Hongxia,
Li Shana,
Guo ZhiXin,
He Nan,
Dai Liming
Publication year - 2009
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200804600
Subject(s) - redox , guanine , electrode , electrochemistry , carbon nanotube , electron transfer , nanotube , dna , chemistry , inorganic chemistry , photochemistry , materials science , nanotechnology , biochemistry , nucleotide , gene
It has been envisioned that carbon nanotubes could promote electron‐transfer reactions when used as electrode materials in electrochemical cells. In the present study, calf thymus DNA was electrochemically oxidized at an electrode modified with multiwalled carbon nanotubes. The potentials for DNA oxidation at pH 7.0 were found to be 0.71 and 0.81 V versus SCE, corresponding to the oxidation of guanine and adenine residues, respectively. An initial oxidation of adenine was observed in the first scan, which was followed by a quasi‐reversible redox process of the oxidation product in the subsequent scans.