期刊
JOURNAL OF PHYSICAL CHEMISTRY B
卷 109, 期 43, 页码 20072-20076出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp0550457
关键词
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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 voltarnmetric 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.
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