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Synthesis and Raman scattering study of double-walled carbon nanotube peapods |
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| Authors: | Hanxun Qiu Zujin Shi Shu-Lin Zhang Jieshan Qiu |
| Institution: | a State Key Laboratory of Rare Earth Materials Chemistry and Applications, Department of Chemistry, Peking University, Beijing 100871, People's Republic of China b Carbon Research Laboratory, State Key Laboratory of Fine Chemicals, Center for Nano Material and Science, Dalian University of Technology, 158 Zhongshan Road, P.O. Box 49, Dalian 116012, People's Republic of China c School of Physics, Peking University, Beijing 100871, People's Republic of China |
| Abstract: | Double-walled carbon nanotubes (DWNTs) encapsulating C60 fullerenes were successfully synthesized by gas phase diffusion method. The obtained peapods were examined using high-resolution transmission electron microscopy (HRTEM). The HRTEM images indicate that the ordered packing phases of fullerene molecules inside are sensitively related to the inner-tube radius of DWNTs. Also, Raman measurements were carried out for the first time to characterize DWNTs peapods. There are obvious differences between the Raman spectrum of DWNTs peapods and that of SWNTs peapods. The intensities of resonances from C60 in the former are much stronger than those in the latter. In addition, changes of tangential mode (TM) and radial breathing mode (RBM) of DWNTs after C60 doping were observed. The possible reasons are discussed in the text. |
| Keywords: | 71 20 Tx 81 07 De 61 46 Fg |
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