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- Title
Low-Temperature Solution Synthesis of Few-Layer 1T ′-MoTe<sub>2</sub> Nanostructures Exhibiting Lattice Compression.
- Authors
Sun, Yifan; Wang, Yuanxi; Sun, Du; Carvalho, Bruno R.; Read, Carlos G.; Lee, Chia ‐ hui; Lin, Zhong; Fujisawa, Kazunori; Robinson, Joshua A.; Crespi, Vincent H.; Terrones, Mauricio; Schaak, Raymond E.
- Abstract
Molybdenum ditelluride, MoTe2, is emerging as an important transition-metal dichalcogenide (TMD) material because of its favorable properties relative to other TMDs. The 1T ′ polymorph of MoTe2 is particularly interesting because it is semimetallic with bands that overlap near the Fermi level, but semiconducting 2H-MoTe2 is more stable and therefore more accessible synthetically. Metastable 1T ′-MoTe2 forms directly in solution at 300 °C as uniform colloidal nanostructures that consist of few-layer nanosheets, which appear to exhibit an approx. 1 % lateral lattice compression relative to the bulk analogue. Density functional theory calculations suggest that small grain sizes and polycrystallinity stabilize the 1T ′ phase in the MoTe2 nanostructures and suppress its transformation back to the more stable 2H polymorph through grain boundary pinning. Raman spectra of the 1T ′-MoTe2 nanostructures exhibit a laser energy dependence, which could be caused by electronic transitions.
- Subjects
NANOSTRUCTURES; TRANSITION metals; CRYSTAL grain boundaries; RAMAN spectra; PHOTOVOLTAIC power generation; OPTOELECTRONIC devices
- Publication
Angewandte Chemie, 2016, Vol 128, Issue 8, p2880
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201510029