【摘要】 低对称性二维过渡金属硫族化合物(TMDs)合金及异质结是一类面外为层状结构、面内对称元素少的功能纳米材料。它不仅表现出丰富可调的电子能带结构，且在光学、电学、力学等方面显示出独特的各向异性物理特性，因而在偏振光探测器、各向异性逻辑电路、触觉传感器等领域具有广阔应用前景。低对称性二维TMDs合金及异质结的可控制备是发挥其优异性能、保障其潜在应用的前提。本文首先按照元素种类的不同从二维铼(Re)基低对称合金和二维碲(Te)基低对称合金两方面对低对称性二维TMDs合金的化学气相沉积法制备进行归纳。然后，按照异质结构的不同从垂直异质结和水平异质结两方面梳理了低对称性二维TMDs异质结制备的最新进展。最后，对该领域现阶段存在的问题及挑战进行了总结与展望。更多还原

【Abstract】 Two-dimensional(2D) transition metal chalcogenide(TMDs) alloys and heterojunctions with low symmetry are a class of functional nanomaterials with layered structure outside the plane and few symmetrical elements inside the plane. It not only shows rich adjustable electronic band structure, but also shows unique anisotropic physical properties in optics, electricity, mechanics, etc. so it has broad application prospects in the fields of polarized light detector, anisotropic logic circuit, tactile sensor and so on. The controllable preparation of low symmetry 2D TMDs alloys and heterojunctions is a prerequisite for their excellent properties. In this work, according to the different types of elements, the chemical vapor deposition of two-dimensional rhenium(Re)-base low-symmetry alloys and two-dimensional tellurium(Te)-base low-symmetry alloys is summarized. Then, according to the difference of heterostructures, the latest progress in the preparation of low symmetry two-dimensional TMDs heterojunctions is reviewed from the aspects of vertical heterojunctions and horizontal heterojunctions. Finally, the problems and challenges in this field are summarized and prospected.更多还原