Atomic force microscopic study on DNA-wrapping for different diameter single-wall carbon nanotubes |
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| Authors: | S. Toita D. Kang K. Kobayashi H. Kawamoto K. Kojima M. Tachibana |
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| Affiliation: | 1. International Graduate School of Arts and Sciences, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan;2. Research Department, NISSAN ARC, LTD., 1 Natsushima-cho, Yokosuka 237-0061, Japan |
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| Abstract: | DNA-wrapped single-wall carbon nanotubes (DNA-SWNT hybrids) prepared from different diameter HiPco- and Arc-SWNTs were investigated by atomic force microscopy. The mean diameter of DNA-HiPco-SWNT hybrids is 1.94 nm that is consistent with one HiPco-SWNT (~ 0.9 nm) wrapped by DNA (~ 1 nm). On the other hand, the mean diameter of DNA-Arc-SWNT hybrids is 3.74 nm that can correspond to one Arc-SWNT (~ 1.4 nm) wrapped by several layers of DNA. It is suggested that the DNA-wrapping mechanism for large diameter Arc-SWNTs is different from that for small diameter HiPco-SWNTs. |
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