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Chin. Phys. B, 2016, Vol. 25(5): 056101    DOI: 10.1088/1674-1056/25/5/056101
CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES Prev   Next  

Structural transitions of SWNT filled with C60 under high pressure

Yong-gang Zou(邹永刚)1, Li Xu(徐莉)1, Kun Tian(田锟)1, He Zhang(张贺)1, Xiao-hui Ma(马晓辉)1, Ming-guang Yao(姚明光)2
1. National Key Laboratory of High Power Semiconductor Lasers, Changchun University of Science and Technology, Changchun 130022, China;
2. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
Abstract  Raman spectra of C60 filled single-walled carbon nanotubes (C60@SWNTs) with diameters of 1.3-1.5 nm have been studied under high pressure. A plateau in the pressure dependence of the G-band frequency at around 10 GPa was observed in both experiments with 514 nm and 830 nm excitation lasers, which is similar to the high pressure behaviors of pristine SWNTs. This structural transition has been assigned to the transformation into a peanut-like structure of the nanotubes. At pressure below 2 GPa, no obvious Raman signature related to the structural transition of nanotubes was observed, unlike what has been reported for C70 filled nanotubes. We discussed this point in terms of the arrangement differences of C60 and C70 molecules inside the nanotubes. At higher pressure up to 15 GPa, a graphite-like pressure evolution was observed in our C60@SWNTs.
Keywords:  carbon nanotubes      high pressure      Raman spectra  
Received:  29 October 2015      Revised:  03 March 2016      Accepted manuscript online: 
PACS:  61.48.-c (Structure of fullerenes and related hollow and planar molecular structures)  
  78.30.-j (Infrared and Raman spectra)  
Corresponding Authors:  Li Xu     E-mail:  xuli@cust.edu.cn

Cite this article: 

Yong-gang Zou(邹永刚), Li Xu(徐莉), Kun Tian(田锟), He Zhang(张贺), Xiao-hui Ma(马晓辉), Ming-guang Yao(姚明光) Structural transitions of SWNT filled with C60 under high pressure 2016 Chin. Phys. B 25 056101

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