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摘要: 对单壁碳纳米管DNA复合物(SWCNTDNA)的微观结构和电化学性质进行了研究。TEM观察表明:通过DNA辅助超声,绝大多数成束单壁管离散为单根分散的碳管。AFM结果进一步证明DNA均匀缠绕在单根离散的碳纳米管外壁,形成稳定的SWCNTDNA复合物。这一自组装过程同时也是碳管的纯化过程,催化剂颗粒在超声过程中被除去。初步探讨了SWCNTDNA复合物的电化学电容性质,结果显示:通过与单链DNA(ssDNA)的杂化作用,SWCNTs的电化学性质得到改善。与SWCNTs相比,SWCNTDNA复合物的比电容提高了117.9%。Abstract: The microstructure and electrochemical properties of hybrids, combining singlewalled carbon nanotubes (SWCNTs) and DNA, were investigated. TEM images of the SWCNTDNA hybrids show that most bundled SWCNTs in the starting materials are isolated into individual ones during the sonicationpromoted selfassembly. AFM observation further indicates that the sidewalls of SWCNTs are helically wrapped by DNA, which results in stable SWCNTDNA complexes. The catalyst particles are totally removed during this selfassembly process, thus the SWCNTs are also purified. The electrochemical properties of the SWCNTs are substantially improved due to the hybridization of DNA and the specific capacitance of the SWCNTDNA hybrids is increased by of 117.9% compared to the parent SWCNTs.
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Key words:
- Singlewalled carbon nanotube (SWCNT) /
- DNA /
- Selfassembly /
- Electrochemical properties
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