Open AccessGrowth direction determination of a single RuO2 nanowire by polarized Raman spectroscopy
Author(s) -
Myung Hwa Kim,
Jeong Min Baik,
Seung J. Lee,
Hae-Young Shin,
Jaeyeon Lee,
Seokhyun Yoon,
Galen D. Stucky,
Martin Moskovits,
Alec M. Wodtke
Publication year - 2010
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.3435475
Subject(s) - high resolution transmission electron microscopy , nanowire , raman spectroscopy , materials science , polarization (electrochemistry) , transmission electron microscopy , brewster's angle , single crystal , optics , molecular physics , condensed matter physics , optoelectronics , nanotechnology , crystallography , chemistry , physics , brewster
The dependence of band intensities in the Raman spectrum of individual single-crystal ruthenium dioxide (RuO2) nanowires on the angle between the plane of polarization of the exciting (and collected) light and the long axis of the nanowire, is shown to be a simple, complementary technique to high resolution transmission electron microscopy (HRTEM) for determining nanowire growth direction. We show that excellent agreement exists between what is observed and what is predicted for the polarization angle dependence of the intensities of the nanowires' E-g (525 cm(-1)) and the B-2g (714 cm(-1)) Raman bands, only by assuming that the nanowires grow along the (001) crystallographic direction, as confirmed by HRTEM.open9
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