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High pressure Raman study of carotene‐encapsulating single‐wall carbon nanotubes
Author(s) -
Arvanitidis J.,
Christofilos D.,
Souliou S. M.,
Yanagi K.,
Kataura H.,
Kourouklis G. A.,
Ves S.
Publication year - 2009
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.200880518
Subject(s) - carbon nanotube , raman spectroscopy , carotene , materials science , deformation (meteorology) , molecule , carbon fibers , high pressure , nanotechnology , chemistry , chemical physics , molecular physics , analytical chemistry (journal) , composite material , optics , thermodynamics , organic chemistry , physics , composite number
Abstract The pressure response of carotene‐encapsulating single‐wall carbon nanotubes is investigated by means of Raman spectroscopy. The pressure evolution of the tangential G band frequencies of the carbon nanotubes is linear without any specific features. On the other hand, the pressure response of the carotene's ν 1 mode frequency is quite distinct, having a smaller low pressure slope than that reported in the literature for the molecule. This behaviour is compatible with the pressure screening effect in the interior of carbon nanotubes. For pressure higher than 2 GPa, the pressure slope becomes even smaller, an effect which can be attributed to the theoretically predicted cross‐section deformation of the encapsulating tubes. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)