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Träfflista för sökning "WFRF:(Yao Mingguang) ;pers:(Cui Jinxing)"

Search: WFRF:(Yao Mingguang) > Cui Jinxing

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1.
  • Cui, Jinxing, et al. (author)
  • Structural Deformation of Sm@C88under High Pressure
  • 2015
  • In: Scientific Reports. - : Nature Publishing Group. - 2045-2322. ; 5
  • Journal article (peer-reviewed)abstract
    • We have studied the structural transformation of Sm@C88 under pressure up to 18 GPa by infraredspectroscopy combined with theoretical simulations. The infrared-active vibrational modes of Sm@C88 at ambient conditions have been assigned for the first time. Pressure-induced blue and red shiftsof the corresponding vibrational modes indicate an anisotropic deformation of the carbon cage uponcompression. We propose that the carbon cage changes from ellipsoidal to approximately sphericalaround 7 GPa. A smaller deformation of the carbon bonds in the area close to the Sm atom in thecage suggests that the trapped Sm atom plays a role in minimizing the compression of the adjacentbonds. Pressure induced a significant reduction of the band gap of the crystal. The HOMO-LUMOgap of the Sm@C88 molecule decreases remarkably at 7 GPa as the carbon cage is deformed. Also,compression enhances intermolecular interactions and causes a widening of the energy bands. Botheffects decrease the band gap of the sample. The carbon cage deforms significantly above 7 GPa,from spherical to a peanut-like shape and collapses at 18 GPa.
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2.
  • Yao, Mingguang, et al. (author)
  • Pressure-induced transformation and superhard phase in fullerenes : the effect of solvent intercalation
  • 2013
  • In: Applied Physics Letters. - : AIP Publishing. - 0003-6951 .- 1077-3118. ; 103:7, s. 071913-
  • Journal article (peer-reviewed)abstract
    • We studied the behavior of solvated and desolvated C-60 crystals under pressure by in situ Raman spectroscopy. The pressure-induced bonding change and structural transformation of C60s are similar in the two samples, both undergoing deformation and amorphization. Nevertheless, the high pressure phases of solvated C-60 can indent diamond anvils while that of desolvated C(60)s cannot. Further experiments suggest that the solvents in the solvated C-60 act as both spacers and bridges by forming covalent bonds with neighbors in 3D network at high pressure, and thus, a fraction of fullerenes may preserve the periodic arrangement in spite of their amorphization.
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  • Result 1-2 of 2
Type of publication
journal article (2)
Type of content
peer-reviewed (2)
Author/Editor
Sundqvist, Bertil (2)
Liu, Ran (2)
Cui, Tian (2)
Liu, Bingbing (2)
Cui, Jinxing (2)Undo refine
Yao, Mingguang (2)
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Zou, Bo (2)
Cui, Wen (1)
Li, Quanjun (1)
Liu, Zhenxian (1)
Yang, Hua (1)
Liu, Ziyang (1)
Ma, Fengxian (1)
Chen, Shuanglong (1)
Xiao, Junping (1)
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University
Umeå University (2)
Language
English (2)
Research subject (UKÄ/SCB)
Natural sciences (2)

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