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Raman and electron microscopy study of C 60 collapse/transformation to a nanoclustered graphene‐based disordered carbon phase at high pressure/temperature
Author(s) -
Benavides Vicente,
Chernogorova Olga P.,
Drozdova Ekaterina I.,
Ushakova Iraida N.,
Soldatov Alexander V.
Publication year - 2015
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201552665
Subject(s) - graphene , raman spectroscopy , materials science , electron microscope , phase (matter) , microscopy , transformation (genetics) , condensed matter physics , nanotechnology , chemistry , optics , physics , organic chemistry , biochemistry , gene
Transformation of C 60 polymers to a superelastic hard carbon (nanoclustered graphene phase (NGP)) occurring in metal matrix at 5 GPa in a temperature interval of 1000–1100 K was studied by optical, scanning electron microscopy (SEM), and Raman spectroscopy. Raman spectral scan across the sample surface allowed us to identify different stages of the structural transformation. The SEM and Raman spectroscopy data testify for the NGP appearance at the defects concentration sites in the parent fullerite structure. We propose that the buckyballs collapse/formation of the NGP is governed by nucleation and growth (diffusive) mechanism unlike earlier discussed in the literature possibility of the martensitic‐type (displacive) character of this transformation.