期刊
ACS APPLIED NANO MATERIALS
卷 4, 期 9, 页码 8834-8844出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.1c01504
关键词
thin films; X-ray absorption spectroscopy; MoS2; local structure; crystallization; molecular dynamics; optical properties; XPS
资金
- Czech Science Foundation [19-17997S, LM2018103]
- Russian Foundation for Basic Research [RFBR 19-07-00353, RFBR 20-52-50012, JPJSBP120204815]
- JSPS KAKENHI [19H02619]
- EUROFEL project
- Elettra Sincrotrone Trieste
This study focuses on the fabrication of two-dimensional TMDCs, using MoS2 as a representative, by crystallizing a thin amorphous layer to achieve well-ordered crystalline films. Strong preferential crystal growth of layered MoS2 is observed along the <002> crystallographic plane from the as-deposited 3D amorphous phase, revealing the mechanism of the crystallization process.
Two-dimensional (2D) transition metal dichalcogenides (TMDCs) have demonstrated a very strong application potential. In order to realize it, the synthesis of stoichiometric 2D TMDCs on a large scale is crucial. Here, we consider a typical TMDC representative, MoS2, and present an approach for the fabrication of well-ordered crystalline films via the crystallization of a thin amorphous layer by annealing at 800 degrees C, which was investigated in terms of long-range and short-range orders. Strong preferential crystal growth of layered MoS2 along the < 002 > crystallographic plane from the as-deposited 3D amorphous phase is discussed together with the mechanism of the crystallization process disclosed by molecular dynamic simulations using the Vienna Ab initio Simulation Package. We believe that the obtained results may be generalized for materials. The proposed approach demonstrates a simple and efficient way to fabricate thin 2D TMDCs for applications in nano-and optoelectronic devices.
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