Laser-induced thermal effects on the hexagonal MoO3 nanorods at
different power density levels were studied using Raman spectroscopy and
scanning electron microscopy techniques. The structural features of the
nanorods were accompanied by varying the incident laser power from 8.0
to 600 mW by using a gradual increasing rate and a sudden increasing
incident laser power. It was shown that the photoeffects observed on the
MoO3 nanorods critically depends on the exposure rate. By gradually
increasing the incident laser power up to 600 mW, morphology of the
nanorods were completely preserved, and the observed thermal behavior
was discussed on the basis of thermal contact at nanoscale. However,
when the irradiation intensity was suddenly increased, it was observed
that overheating of h-MoO3 nanorods at relatively lower laser powers (80
mW) sublimate the nanorods around the laser spot region. The MoO3
molecules on vapor-phase at high temperatures condense and crystallize
next to the laser spot on the orthorhombic (alpha-MoO3) and monoclinic
(beta-MoO3) phases. Furthermore, the nanorods closest to the laser spot
region undergo a structural phase (and morphological) transition from
h-MoO3 phase to alpha-MoO3 phase.
%0 Journal Article
%1 WOS:000447570300023
%A Silveira, J V
%A Moura, J V B
%A Luz-Lima, C
%A Freire, P T C
%A Filho, A G Souza
%C PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
%D 2018
%I ELSEVIER SCIENCE BV
%J VIBRATIONAL SPECTROSCOPY
%K Phase Raman Thermal contact} photoeffects; spectroscopy; transitions; {Induced
%P 145-151
%R 10.1016/j.vibspec.2018.08.005
%T Laser-induced thermal effects in hexagonal MoO3 nanorods
%V 98
%X Laser-induced thermal effects on the hexagonal MoO3 nanorods at
different power density levels were studied using Raman spectroscopy and
scanning electron microscopy techniques. The structural features of the
nanorods were accompanied by varying the incident laser power from 8.0
to 600 mW by using a gradual increasing rate and a sudden increasing
incident laser power. It was shown that the photoeffects observed on the
MoO3 nanorods critically depends on the exposure rate. By gradually
increasing the incident laser power up to 600 mW, morphology of the
nanorods were completely preserved, and the observed thermal behavior
was discussed on the basis of thermal contact at nanoscale. However,
when the irradiation intensity was suddenly increased, it was observed
that overheating of h-MoO3 nanorods at relatively lower laser powers (80
mW) sublimate the nanorods around the laser spot region. The MoO3
molecules on vapor-phase at high temperatures condense and crystallize
next to the laser spot on the orthorhombic (alpha-MoO3) and monoclinic
(beta-MoO3) phases. Furthermore, the nanorods closest to the laser spot
region undergo a structural phase (and morphological) transition from
h-MoO3 phase to alpha-MoO3 phase.
@article{WOS:000447570300023,
abstract = {Laser-induced thermal effects on the hexagonal MoO3 nanorods at
different power density levels were studied using Raman spectroscopy and
scanning electron microscopy techniques. The structural features of the
nanorods were accompanied by varying the incident laser power from 8.0
to 600 mW by using a gradual increasing rate and a sudden increasing
incident laser power. It was shown that the photoeffects observed on the
MoO3 nanorods critically depends on the exposure rate. By gradually
increasing the incident laser power up to 600 mW, morphology of the
nanorods were completely preserved, and the observed thermal behavior
was discussed on the basis of thermal contact at nanoscale. However,
when the irradiation intensity was suddenly increased, it was observed
that overheating of h-MoO3 nanorods at relatively lower laser powers (80
mW) sublimate the nanorods around the laser spot region. The MoO3
molecules on vapor-phase at high temperatures condense and crystallize
next to the laser spot on the orthorhombic (alpha-MoO3) and monoclinic
(beta-MoO3) phases. Furthermore, the nanorods closest to the laser spot
region undergo a structural phase (and morphological) transition from
h-MoO3 phase to alpha-MoO3 phase.},
added-at = {2022-05-23T20:00:14.000+0200},
address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
author = {Silveira, J V and Moura, J V B and Luz-Lima, C and Freire, P T C and Filho, A G Souza},
biburl = {https://www.bibsonomy.org/bibtex/21880e563cc6d17d40d6bf92b230b5344/ppgfis_ufc_br},
doi = {10.1016/j.vibspec.2018.08.005},
interhash = {0c421478968058fdd6eafbc3693a0972},
intrahash = {1880e563cc6d17d40d6bf92b230b5344},
issn = {0924-2031},
journal = {VIBRATIONAL SPECTROSCOPY},
keywords = {Phase Raman Thermal contact} photoeffects; spectroscopy; transitions; {Induced},
pages = {145-151},
publisher = {ELSEVIER SCIENCE BV},
pubstate = {published},
timestamp = {2022-05-23T20:00:14.000+0200},
title = {Laser-induced thermal effects in hexagonal MoO3 nanorods},
tppubtype = {article},
volume = 98,
year = 2018
}