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Orientation-dependent optical characterization of atomically thin transition metal ditellurides

Title
Orientation-dependent optical characterization of atomically thin transition metal ditellurides
Authors
Hoang, Anh TuanShinde, Sachin M.Katiyar, Ajit K.Dhakal, Krishna P.Chen, XiangKim, HyunminLee, Suk WooLee, ZonghoonAhn, Jong-Hyun
DGIST Authors
Kim, Hyunmin
Issue Date
2018-12
Citation
Nanoscale, 10(46), 21978-21984
Type
Article
Article Type
Article
ISSN
2040-3364
Abstract
Molybdenum ditellurides (MoTe2) have recently attracted attention owing to their excellent structurally tunable nature between 1T′(metallic)- and 2H(semiconducting)-phases; thus, the controllable fabrication and critical identification of MoTe2 are highly desired. Here, we semi-controllably synthesized 1T′- and 2H-MoTe2 crystals using the atmospheric pressure chemical vapor deposition (APCVD) technique and studied their grain-orientation dependency using polarization-sensitive optical microscopy, Raman scattering, and second-harmonic generation (SHG) microspectroscopy. The polycrystalline 1T′-MoTe2 phase with quasi-1D Mo-Mo zigzag chains showed anisotropic optical absorption, leading to a clear visualization of the lattice domains. On the other hand, 2H-MoTe2 lattice grains did not exhibit any discernible difference under polarized light illumination. The combined aforementioned microscopy techniques could be used as an easy-to-access and non-destructive tool for a quick and solid identification of intended lattice orientation development in industry-scale MoTe2 crystal manufacturing. © 2018 The Royal Society of Chemistry.
URI
http://hdl.handle.net/20.500.11750/9506
DOI
10.1039/c8nr07592a
Publisher
Royal Society of Chemistry
Related Researcher
Files:
There are no files associated with this item.
Collection:
Companion Diagnostics and Medical Technology Research Group1. Journal Articles


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