In:
Advanced Materials, Wiley, Vol. 29, No. 38 ( 2017-10)
Abstract:
The controlled synthesis of MoTe 2 and WTe 2 is crucial for their fundamental research and potential electronic applications. Here, a simplified ambient‐pressure chemical vapor deposition (CVD) strategy is developed to synthesize high‐quality and large‐scale monolayer and few‐layer 1T′‐phase MoTe 2 (length ≈ 1 mm) and WTe 2 (length ≈ 350 µm) crystals by using ordinary salts (KCl or NaCl) as the growth promoter combining with low‐cost (NH 4 ) 6 Mo 7 O 24 ·4H 2 O and hydrate (NH 4 ) 10 W 12 O 41 · x H 2 O as the Mo and W sources, respectively. Atomic force microscopy, X‐ray photoelectron spectroscopy, Raman spectroscopy, and transmission electron microscopy confirm the high‐quality nature and the atomic structure of the as‐grown 1T′ MoTe 2 and WTe 2 flakes. Variable‐temperature transport measurements exhibit their semimetal properties. Furthermore, near‐field nanooptical imaging studies are performed on the 1T′ MoTe 2 and WTe 2 flakes for the first time. The sub‐wavelength effects of 1T′‐phase MoTe 2 (λ p ≈ 140 nm) and WTe 2 (λ p ≈ 100 nm) are obtained. This approach paves the way for the growth of special transition‐metal dichalcogenides materials and boosts the future polaritonic research of 2D telluride compounds.
Type of Medium:
Online Resource
ISSN:
0935-9648
,
1521-4095
DOI:
10.1002/adma.201700704
Language:
English
Publisher:
Wiley
Publication Date:
2017
detail.hit.zdb_id:
1474949-X
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