继石墨烯后，少层或单层二硫化钼已成为具有里程碑意义的新型类石墨烯材料。类石墨烯二硫化钼具有与石墨烯相似的大比表面积、高载流子迁移率及与石墨烯互补的光电特性, 在能量存储、催化、光、电器件与传感等领域有潜在的应用前景。本项目拟针对材料制备及功能设计中的关键问题，从发展可控、高效制备新策略入手，通过对液相剥离、水热合成和高温化学制备等过程的系统研究，深入探讨各过程参数的动力学影响，初步揭示层间剥离/片层形成及生长的调控机制，获得系列高品质少层或单层二硫化钼及水溶性单层量子点。基于空位缺陷设计、表面能级修饰和晶面电传导调控原理，设计制备类石墨烯二硫化钼杂化及功能复合材料，拟通过对材料结构性能的调控，增强界面光电协同效应，阐明模型研究体系的界面电化学及光电化学响应机制。基于高选择性分子识别以及纳米信号放大策略，发展高性能光电生物分析平台。设计并构建二硫化钼量子点荧光分析体系，挖掘相关生物分析应用。

Along with in-depth study on graphene, few- or single-layer nanosheets of molybdenum dichalcogenide (MoS2), as one of inorganic graphene analogues, opens a new era for planar materials. These 2D ultrathin atomic layer structures possess similar properties as graphene (such as large surface area, high carrier mobility, low toxicity), and also exhibit extra optical and electronic properties superior to graphene. These attributes manifest versatile applications of these materials in hydrogen storage and lithium ion battery, catalysis, optical and electronic devices as well as sensors. This project aims at developing and exploring facile and effective strategy for controllable preparation of few- or single-layer MoS2 nanosheets through systematic methodology investigation. Through detail study on the processes of liquid phase exfoliation, hydrothermal synthesis and high temperature reaction via tuning the experimental factors, the mechanism of exfoliation/formation and growth of the nanosheets will be discussed. Series of few- or single-layer MoS2 nanosheets and water-soluble single-layer MoS2 quantum dots with high quality can be achieved. In addition, hybrid nanosheets containing more planar defective sites are designed and can be obtained by chemical doping, several MoS2-based functional materials may be obtained via surface modification with functional molecules and combination with conducting components. Via reasonable structure design, activated photoelectrochemical effects are anticipated at these functional electrode materials. The activation mechanism of electrochemical and photoelectrochemical activities towards model molecule will be clarified. Based on the high selective molecular recognition towards the analysts and signal amplification strategy, high performance bioanalytical platforms may be developed. Meanwhile, application of MoS2 quantum dots for bioanalysis will be exploited. Above results may pave the way to developing novel materials of graphene analogues and exploiting the potential in bioanalysis.