Standing or lying C70s encapsulated in carbon nanotubes with different diameters |
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Authors: | Lunhui Guan Zujin Shi Zhennan Gu |
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Institution: | a Department of Chemistry, Peking University, Beijing 100871, People's Republic of China b Department of Physics, Peking University, Beijing 100871, People's Republic of China |
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Abstract: | Single-walled carbon nanotubes (SWNTs) encapsulating C70s, so-called C70 peapods, were synthesized in high yield by a vapor-phase doping method. Raman spectra, high resolution transmission electron microscopy (HRTEM), and selected area electron diffraction (SAED) measurement indicate that the tube diameter is one of the important factors to determine the orientation of C70 molecules inside the SWNTs. SWNTs with different diameters give different alignment of C70 molecules. The lying orientation is favorable over the standing orientation in thin nanotube, i.e. 1.36 nm nanotubes, whereas the standing orientation is favorable in thick nanotubes, i.e. 1.49 and 1.61 nm nanotubes. |
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Keywords: | 61 48 +c 81 05 Tp 82 80 Nj |
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