title: DNA functionalized single-walled carbon nanotubes for electrochemical detection.
abstract: Single-walled carbon nanotubes (SWNTs) were effectively dispersed and functionalized by wrapping with single-stranded DNA (ssDNA). The ssDNA-SWNTs attach strongly on glass substrate and easily form a uniform film, making it possible for electrochemical analysis and sensing. The film was fabricated into a working electrode, which exhibited good electrochemical voltammetric properties, such as flat and wide potential window, well-defined quasi-reversible voltammetric responses, and quick electron transfer for a Fe(CN)6(3-)/Fe(CN)6(4) system, indicating that the ssDNA-SWNTs film should be a good analytical electrode for electrochemical detection or sensing. This was demonstrated by highly selective and sensitive detection of a low concentration of dopamine in the presence of excess ascorbic acid.
authors.affiliation: Department of Applied Physics, Chongqing University, Chongqing 400044, China.
authors.forename: Chenguo
authors.initials: C
authors.lastname: Hu
authors.forename: Yiyi
authors.initials: Y
authors.lastname: Zhang
authors.forename: Gang
authors.initials: G
authors.lastname: Bao
authors.forename: Yuelan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Meilin
authors.initials: M
authors.lastname: Liu
authors.forename: Zhong Lin
authors.initials: ZL
authors.lastname: Wang
mesh_terms: D002244:Carbon; D004247:DNA / Q000032:analysis* / Q000737:chemistry*; D004563:Electrochemistry / Q000379:methods*; D008855:Microscopy, Electron, Scanning; D008958:Models, Molecular; D036103:Nanotechnology / Q000379:methods*; D009838:Oligodeoxyribonucleotides / Q000737:chemistry*
chemical_list: D009838:Oligodeoxyribonucleotides; D002244:Carbon; D004247:DNA