过渡金属二硫化物（TMDs）无相变可控插层剥离：高质量单层TMDs二维纳米材料宏量制备探索

单层过渡金属二硫化物（TMDs）具有类石墨烯的二维纳米结构，已成为继石墨烯之后被广泛关注的新型二维纳米材料。由于具有独特的光、电特性，其一系列半导体成员已在光电子器件等领域展现了光明的应用前景。然而目前相关研究工作仍受困于高质量、单层TMDs二维纳米材料的宏量制备瓶颈。本项目针对TMDs层状晶体插层剥离过程中的相结构转变难题，以理论可行性为切入点，创新提出基于TMDs晶体的无相变、可控插层及高效剥离制备路线，以突破高质量、单层TMDs二维纳米材料宏量制备的瓶颈问题。项目将重点探索一系列TMDs成员插层过程中各反应条件和参数的影响，系统性揭示其插层过程中的相转变规律，确定其临界相转变节点，实现一系列TMDs成员的无相变、可控插层，并研究所得无相变TMDs插层化合物在系列溶剂中的高效剥离，大幅提升其剥离效率和单层产率。项目研究成果有望实现TMDs二维纳米材料的宏量生产，并促进其产业化应用研究。

Monolayer transition metal dichalcogenides (TMDs) have graphene-like two-dimensional structure and have attracted intensive interest as a new type of two-dimensional nanomaterial like graphene. Attributed to their unique optical and electronic properties, a series of its semiconductor members have shown promising applications in the fields like optoelectronic devices. However, corresponding study has been hampered by the lack of efficient way to prepare high-quality monolayer TMDs on a large scale. Focusing on the phase change problem during the intercalation and exfoliation of TMDs layered crystals, this project puts forward a new strategy to solve the bottleneck problem for the macroscopic quantity preparation of high-quality monolayer TMDs. This strategy is based on solid theoretical analysis and combines the controllable intercalation and exfoliation of TMDs crystals without phase change. The main tasks of this project are to investigate the influences of various reaction conditions and parameters on the phase change of TMDs during the intercalation process, to identify the turning point of the phase change, in order to achieve the controllable intercalation of TMDs crystals without phase change. Besides, systematical study on the exfoliation of the obtained intercalated compounds without phase change in a wide range of solvents will be also carried out, in order to significantly improve the exfoliation efficiency and the yield of monolayer products. The research findings of this project may be used to implement the preparation of TMDs two-dimensional nanomaterials on a large scale and promote theirs industrial application research.