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Investigation of thermostability and phonon–phonon interactions in Mo 6 S 3 I 6 nanowires by Raman scattering spectroscopy
Author(s) -
Todorović J. M.,
DohčevićMitrović Z. D.,
Ðokić D. M.,
Mihailović D.,
Popović Z. V.
Publication year - 2010
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.2528
Subject(s) - nanowire , raman spectroscopy , phonon , raman scattering , materials science , phonon scattering , thermostability , scattering , phase (matter) , condensed matter physics , chemistry , analytical chemistry (journal) , nanotechnology , optics , physics , organic chemistry , enzyme
Detailed Raman scattering measurements were performed on molybdenum–sulfur–iodine nanowires (Mo 6 S 3 I 6 ). At room temperature, 21 well‐resolved Raman modes were experimentally observed for the first time in this new compound. The phase stability and vibrational properties of the nanowires were investigated by different temperature treatments. High‐temperature Raman spectra showed that the phase separation of Mo 6 S 3 I 6 nanowires took place between 573 and 673 K, followed by appearance of a new mode at 819 cm −1 characteristic of the MoO 3 phase. Low‐temperature Raman scattering spectra showed a significant difference in phonon–phonon interactions between internal and external Raman modes of Mo 6 S 3 I 6 nanowires. These interesting vibrational properties can give new insights for improved material preparation and achievement of higher conductivity and other functional properties of these otherwise interesting materials. Copyright © 2009 John Wiley & Sons, Ltd.