2004年，英国科学家通过机械剥离的方法得到了单层石墨烯，其非凡的电子传输性能引起了学界对以石墨烯为代表的二维材料的研究热潮。二维过渡金属硫族化合物（2D-TMDs）因其丰富的化学组成和多样的晶体结构在众多二维材料中脱颖而出。
新型二维材料ReS2具有面内低晶格对称性的结构特点，在光学、电学、力学等性质上表现出显著的各向异性。ReS2 与其他 2D  TMDs（例如MoS2等）组装可以形成低对称性的二维异质结，赋予材料崭新的光电性质，在新型微纳电子器件领域具有极大的应用价值。
本文采用盐辅助化学气相沉积法（SACVD），通过优化生长温度、生长时间等实验参数，制备出大尺寸、高质量的单层MoS2和 ReS2，并结合面对面的生长策略，成功实现了低对称性二维ReS2/MoS2异质结的稳定制备。进一步，使用光学显微镜、原子力显微镜、扫描电子显微镜、共聚焦拉曼显微镜等仪器对单层 MoS2、ReS2及其异质结进行微观形貌和组成结构的表征，深入理解材 料的生长机理，为该材料的制备与应用提供了新思路。

In 2004, British scientists obtained monolayer graphene through mechanical exfoliation, which aroused a research frenzy in academia due to its extraordinary electronic transport properties. Among the two dimensional (2D) materials, transition metal dichalcogenides (2D-TMDs) stand out for their rich chemical compositions and diverse crystal structures. ReS2, with its low in-plane crystal symmetry, exhibits significant anisotropy in optical, electrical, and mechanical properties. Due to the intrinsic anisotropy of ReS2, assembling it with other 2D-TMDs, such as MoS2, can form low-symmetry 2D heterostructures, endowing the material with novel optoelectronic properties and great potential for applications in new micro-nano electronic devices.
In this study, we utilized a salt-assisted chemical vapor deposition (SACVD) technique to synthesize large-sized and high-quality monolayer MoS2 and ReS2 by optimizing the growth temperature and duration. Subsequently, we employed a face-to-face growth strategy to successfully fabricate low-symmetry ReS2/MoS2 heterostructures. Furthermore, the microscopic morphology and composition structure of monolayer MoS2, ReS2, and their heterostructures were characterized using optical microscopy, atomic force microscopy, scanning electron microscopy, Confocal Raman microscope which helped to deeply understand the growth mechanism of the materials. It could potentially pave the way for the development of polarization photodetectors with enhanced responsivity, thereby offering novel insights into the preparation and application of this particular material.