Influence of cyclic thermal treatment near the first order phase transition on the supramolecular structure of C60

V. T. Lebedev, Gy Torok, G. A. Evmenenko, I. V. Golosovsky, Gy Kali, L. Cser, D. N. Orlova, A. I. Sibilev, V. P. Budtov

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Abstract

We have studied the modification of supramolecular structure of fullerene (precipitated from supersaturated solution) subjected by cyclic thermal treatment. The investigation of supramolecular structure of C60 crystals was performed by neutron diffraction and small angle scattering at different stages of cyclic thermal treatment. The characteristic domain size inside the crystallites (from the diffraction peaks broadening obtained) was D to approximately 30-50 nm corresponding to the correlation radius of inhomogeneities Rc≈D obtained from the small angle scattering measurements. Using the SANS measurements we found also small inhomogeneities with radius of rc to approximately 3-4 nm forming structures at the crystal surface with the characteristic period of approximately 2 rc to approximately 10 nm. The cyclic thermal treatment of sample reduced the concentration of large defects for approximately 6% vol. and the fragmentation of surface structures at the scale approximately 10 nm. We have analyzed the changing of surface structure, applying a model for small angle scattering intensity I = I0/(1+Rc2q2)β/2, where the β parameter yields the fractal dimension Ds = 6-β of the surface.

Original languageEnglish
Pages (from-to)II/-
JournalMaterials Science Forum
Volume321
Publication statusPublished - Jan 1 2000
EventProceedings of the 1998 6th European Powder Diffraction Conference (EPDIC 6) - Budapest, Hung
Duration: Aug 22 1998Aug 25 1998

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Lebedev, V. T., Torok, G., Evmenenko, G. A., Golosovsky, I. V., Kali, G., Cser, L., Orlova, D. N., Sibilev, A. I., & Budtov, V. P. (2000). Influence of cyclic thermal treatment near the first order phase transition on the supramolecular structure of C60. Materials Science Forum, 321, II/-.