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Chinese Physics C> 2005, Vol. 29> Issue(S1) : 112-115 

High Pressure Studies of Nano/Sub-Micrometer C70 Rods

  •  National Lab of Physics, Superhard Materials of Jilin University, Changchun 130012, China2 Institute of High Energy of Physics, Chinese Academe of Sciences, Beijing 100049, China3 Department of Experimental Physics, Ume\aa University, 90187 Ume\aa, Sweden

  • We have successfully synthesized C70 rods in nano/sub-micrometers scale by evaporating solvent method. The diameter of the as grown C70 rods is ～500 nm, and the length is ～10μm. The EDXD pattern and Raman spectroscopy for as -grown sample indicate that the as grown C70 rod is in hcp structure. The pressure-induced structural phase transition has been studied by using DAC combined with EDXD and Raman spectroscopy methods under quasi-hydrostatic pressure up to 26.1GPa. It is found that hcp structure transforms into amorphous phase for C70 rods in the pressure range from 23.3 to 26.1GPa, which is higher than the transformation pressure for bulk C70 crystals. The phase transition is irreversible and it is induced by the collapse of C70 cage.
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    [1] . Kroto H W, Heath J R, OBrien S C et al. Nature, 1985,318: 1622. Kra.tschmer W, Lamb L D, Fostiropoulos K et al. Nature,1990, 347: 3543. Sundqvist B, Structure, Bonding. 2004, 109: 854. Sundqvist B. Advances in Physics, 1999, 48(1): 15. Duclos S J, Brister K, Haddon R C et al. Nature, 1991,351: 3806. Nú.z-Regueiro M, Monceau P, Hodeau J L. Nature, 1992,355: 2377. Núez-Regueiro M, Abello L, Lucazeau G et al. Phys. Rev.,1992, B46: 99038. Blank V, Popov M, Buga S et al. Phys. Lett., 1994, A188:2819. Maksimov A A, Meletov K P, Osipyan Yu A et al. JETP Lett., 1993, 57: 81610. Sood A K, Chandrabhas N, Muthu D V S et al. Philos.Mag., 1994, B70: 34711. Wasa S, Suito K, Kobayashi M et al. Solid State Communications,2000, 114: 20912. WANG Lin, LIU Bing-Bing, LIU De-Di et al. to be published

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WANG Lin, LIU Bing-Bing, LIU De-Di, HOU Yuan-Yuan, YAO Ming-Guang, ZOU Guang-Tian, LI Hui, LUO Zong-Ju, LI YAN and LIU Jing. High Pressure Studies of Nano/Sub-Micrometer C70 Rods[J]. Chinese Physics C, 2005, 29(S1): 112-115.
WANG Lin, LIU Bing-Bing, LIU De-Di, HOU Yuan-Yuan, YAO Ming-Guang, ZOU Guang-Tian, LI Hui, LUO Zong-Ju, LI YAN and LIU Jing. High Pressure Studies of Nano/Sub-Micrometer C70 Rods[J]. Chinese Physics C, 2005, 29(S1): 112-115. shu
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Received: 2005-10-31
Revised: 1900-01-01
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High Pressure Studies of Nano/Sub-Micrometer C70 Rods

    Corresponding author: LIU Bing-Bing,
  • National Lab of Physics, Superhard Materials of Jilin University, Changchun 130012, China2 Institute of High Energy of Physics, Chinese Academe of Sciences, Beijing 100049, China3 Department of Experimental Physics, Ume\aa University, 90187 Ume\aa, Sweden
  • Received Date: 2005-10-31
  • Accepted Date: 1900-01-01
  • Available Online: 2005-01-02

Abstract: We have successfully synthesized C70 rods in nano/sub-micrometers scale by evaporating solvent method. The diameter of the as grown C70 rods is ～500 nm, and the length is ～10μm. The EDXD pattern and Raman spectroscopy for as -grown sample indicate that the as grown C70 rod is in hcp structure. The pressure-induced structural phase transition has been studied by using DAC combined with EDXD and Raman spectroscopy methods under quasi-hydrostatic pressure up to 26.1GPa. It is found that hcp structure transforms into amorphous phase for C70 rods in the pressure range from 23.3 to 26.1GPa, which is higher than the transformation pressure for bulk C70 crystals. The phase transition is irreversible and it is induced by the collapse of C70 cage.

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