ISSN:
1432-0630
Schlagwort(e):
PACS: 61.46; 62.50; 78.30
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Maschinenbau
,
Physik
Notizen:
60 are reported. The material associated with the mixture of rhombohedral and tetragonal phases was synthesized under pressure of \valunit{3}{GPa} when treatment temperature was only a little lower than the high-temperature limit of C60 stability. The substance exhibits very rich infrared and Raman spectra as well as luminescence spectra of an unusual shape. They show that vibrational transitions in the prepared carbon architecture substantially deviate from icosahedral symmetry of buckyballs and exhibit a similarity with lattice phonons in graphite. It may originate from mixing of C60 modes and vibrations of a layer structure on deformed and weakly bound fullerene molecules. The luminescence spectra reveal three distinct electronic states located below \valunit{1.80}{\eV} . One of them responsible for the emission peak at \valunit{1.74}{\eV} is very characteristic for the pressure modified fullerene. The data should be useful for the accurate determination of structural changes in C60 induced by pressure.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/s003390050473
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