Recent studies have confirmed that model C-60 has stable liquid phase conned to rather narrow temperature range; in this letter we determine the phase diagram of model C-70 and show that also this fullerene possesses liquid phase whose existence range is wider than that of C-60. A corresponding state behaviour of C-60 and C-70, emerging from description in terms of reduced quantities of both the interaction potential and the phase diagrams parameters, is then extended to higher-order fullerenes. Critical- and triple-point densities and temperatures of C-76, C-84 and C-92 are thereby predicted. The decreasing accuracy of such representation of C-n>70 phase behaviour with increasing n is discussed in relation to the model potential features.

Phase diagram of model C-n >= 70 fullerenes

ABRAMO, Maria Concetta;CACCAMO, Carlo;COSTA, Dino;PELLICANE, Giuseppe
2001

Abstract

Recent studies have confirmed that model C-60 has stable liquid phase conned to rather narrow temperature range; in this letter we determine the phase diagram of model C-70 and show that also this fullerene possesses liquid phase whose existence range is wider than that of C-60. A corresponding state behaviour of C-60 and C-70, emerging from description in terms of reduced quantities of both the interaction potential and the phase diagrams parameters, is then extended to higher-order fullerenes. Critical- and triple-point densities and temperatures of C-76, C-84 and C-92 are thereby predicted. The decreasing accuracy of such representation of C-n>70 phase behaviour with increasing n is discussed in relation to the model potential features.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11570/1581424
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