Glassy carbon electrodes modified with DNA-partly-wrapped single-walled carbon nanotubes
Glassy carbon electrodes modified with DNA-partly-wrapped single-walled carbon nanotubes
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DOI：
10.1016/j.elecom.2007.09.007
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发表时间：
2007-11
影响因子：
5.4
通讯作者：
Hui-Hui Li-Hui;Zhiling Zhang;Xin-Cheng Shen;Mingxi Zhang;D. Pang
中科院分区：
文献类型：
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作者：
Hui-Hui Li-Hui;Zhiling Zhang;Xin-Cheng Shen;Mingxi Zhang;D. Pang
首次采用差速离心法从小牛胸腺DNA和单壁碳纳米管的混合物中分离出部分包裹DNA的单壁碳纳米管(DNA-p-SWCNTs)。DNA-p-SWCNTs和DNA-全包裹SWCNTs(DNA-f-SWCNTs)的平均DNA/SWCNTs质量比分别为0.8和2.0。研究发现，DNA-p-SWCNTs由于其特殊的结构，可以在玻碳电极上形成均匀的多孔膜，促进带正电荷的化合物与电极之间的电子转移，并在低离子强度下表现出良好的富集性。
DNA-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.