TY - JOUR
T1 - Structural stability of the rhombohedral 2D polymeric phase of C60 studied by in-situ Raman scattering at pressures up to 30 GPa
AU - Meletov, K. P.
AU - Arvanitidis, J.
AU - Kourouklis, G. A.
AU - Prassides, K.
AU - Iwasa, Y.
N1 - Funding Information:
The support by the General Secretariat for Research and Technology, Greece, is acknowledged. This research has been also supported by a Marie Curie Fellowship of the European Community programme `Improving the Human Research Potential' to JA under contract number HPMF-CT-2001-01436, the NEDO Frontier Carbon Technology and the Royal Society (UK/Japan CRP).
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2002/5/10
Y1 - 2002/5/10
N2 - The structural stability of the rhombohedral two-dimensional (2D) polymeric phase of C60 has been studied as a function of pressure up to ∼30 GPa at room temperature by means of in-situ Raman scattering. An irreversible transformation to a new disordered phase was observed at a pressure of ∼15 GPa. The intensity of the Ag(2) pentagonal pinch (PP) mode rapidly decreases in the pre-transitional pressure range while the Raman spectrum of the transformed material becomes very diffuse. The high-pressure phase recovered to normal conditions is metastable and transforms under heating to a mixture of pristine and dimerized C60 as can be seen by their Raman spectra. The retention of the fullerene molecular cage at high pressure and quenching of the PP-mode are the indications that the high-pressure phase may be associated with a random creation of new polymeric bonds between the molecules in adjacent polymeric planes of the 2D-rhombohedral phase of C60.
AB - The structural stability of the rhombohedral two-dimensional (2D) polymeric phase of C60 has been studied as a function of pressure up to ∼30 GPa at room temperature by means of in-situ Raman scattering. An irreversible transformation to a new disordered phase was observed at a pressure of ∼15 GPa. The intensity of the Ag(2) pentagonal pinch (PP) mode rapidly decreases in the pre-transitional pressure range while the Raman spectrum of the transformed material becomes very diffuse. The high-pressure phase recovered to normal conditions is metastable and transforms under heating to a mixture of pristine and dimerized C60 as can be seen by their Raman spectra. The retention of the fullerene molecular cage at high pressure and quenching of the PP-mode are the indications that the high-pressure phase may be associated with a random creation of new polymeric bonds between the molecules in adjacent polymeric planes of the 2D-rhombohedral phase of C60.
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U2 - 10.1016/S0009-2614(02)00522-5
DO - 10.1016/S0009-2614(02)00522-5
M3 - Article
AN - SCOPUS:0037052516
VL - 357
SP - 307
EP - 313
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
IS - 3-4
ER -