Glassy carbon electrodes modified with DNA-partly-wrapped single-walled carbon nanotubes
2007; Elsevier BV; Volume: 9; Issue: 11 Linguagem: Inglês
10.1016/j.elecom.2007.09.007
ISSN1873-1902
AutoresHui‐Hui Li, Zhiling Zhang, Xin‐Cheng Shen, Mingxi Zhang, Dai‐Wen Pang,
Tópico(s)Electrochemical Analysis and Applications
ResumoDNA-partly-wrapped single-walled carbon nanotubes (DNA-p-SWCNTs) were separated from the mixtures of calf thymus DNA and SWCNTs in solution by differential centrifugation for the first time. Average mass ratios of DNA to SWCNTs for DNA-p-SWCNTs and DNA-fully-wrapped-SWCNTs (DNA-f-SWCNTs) were determined to be 0.8 and 2.0, respectively. It has been found that DNA-p-SWCNTs could form a uniform and porous film on glassy carbon electrodes due to special structure of them, which could facilitate the electron transfer between positively-charged compounds and electrodes, and showed good enrichment capability at low ionic strength.
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