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Progress in Chemistry DOI: 10.7536/PC230810   Next Articles

Synthesis of Low-symmetry 2D Transition Metal Dichalcogenides by Chemical Vapor Deposition

Yun Chen1†, Hui Zhang2†, Zheng Luo2, Weiguo Mao3, Jun'an Pan1,*, Shanshan Wang2,*   

  1. 1. School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, China;
    2. Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China;
    3. College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha 410114, China
  • Received: Revised:
  • Contact: *e-mail: pja3330@xtu.edu.cn (J.P.); wangshanshan08@nudt.edu.cn (S.W.)
  • About author:† These authors contributed equally to this work.
  • Supported by:
    National Natural Science Foundation of China (52172032, 52222201), Young Elite Scientists Sponsorship Program by CAST (YESS20200222), National University of Defense Technology (ZZCX-ZZGC-01-07), and Hunan Natural Science Foundation (2022JJ20044).
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Low-symmetry two-dimensional materials are a new type of nanomaterials with few lattice symmetry operations and only atomic-level thickness in the longitudinal direction. In the two-dimensional transition metal dichalcogenides (TMDs) system, 1T'-MoTe2, 1T'-WTe2, 1T'-ReS2 and 1T'-ReSe2 are typical low-symmetry members. The unique lattice symmetry brings them rich anisotropic physical and chemical properties, so they have special application prospects in the fields of micro-nano photonics, tactile sensors, and anisotropic logic devices. The basic research and application development of low-symmetry two-dimensional TMDs materials rely on the high-quality, large-size, and stable preparation of such materials. Therefore, this paper takes these four types of materials as typical materials, first classifies them according to metal precursors, and reviews the chemical vapor deposition (CVD) preparation methods of low-symmetry two-dimensional TMDs materials in recent years. Secondly, according to the characteristics of 1T'-MoTe2 easy to undergo phase transition and weak interaction between 1T'-ReS2, 1T'-ReSe2 and the substrate during the preparation process, the phase regulation mechanism in the preparation process of 1T'-MoTe2 and the substrate engineering research in the preparation process of 1T'-ReS2 and 1T'-ReSe2 were introduced. . Finally, this paper looks forward to the future challenges and opportunities of low-symmetry 2D TMDs materials.
Key words: 2D material, Low symmetry, Chemical vapor deposition, Phase selection, Substrate engineering
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