基于温和等离子体插层的二维材料复合结构的制备及光探测应用研究

二维原子晶体（分子）复合结构具有可大范围调节的电子性质，从而可提供远超现有材料的独特功能和技术应用。本项目提出一种创新性的温和等离子体插层的方法用于制备二维原子晶体分子复合结构，并在该结构表面引入等离子激元半金属纳米颗粒，实现这种复合结构在光电探测器中的应用。研究内容包括：（1）研究二维原子晶体分子复合结构的成分、微结构、层间距和光学特性与等离子体处理参数的内在联系；（2）结合实验和理论探索等离子体构造二维原子晶体分子复合结构的物理机制；（3）实现半金属纳米颗粒的可控制备并研究其等离子激元效应机制；（4）构筑基于半金属纳米颗粒修饰的二维原子晶体分子复合结构（或异质结）光电探测器并研究其光响应性能。项目申请人在二维材料及光电器件和等离子体技术研发方面具有丰富经验，而且前期工作证明本方案具有高度的可行性，研究成果可为二维原子晶体分子复合结构的按需可控制备及相关光电器件的开发提供理论和应用基础。

Two-dimensional atomic crystal (molecular) hybrid structures possess variable electronic properties within a large range, and consequently provide many unique functions and technological applications that are beyond the reach of existing materials. This project proposes an innovative soft plasma-intercalation technique for the preparation of such two-dimensional atomic crystal molecular hybrid structures and introduces plasmonic semimetal-nanoparticles on the surface of such hybrid structures to realize the application in photodetectors. The main research contents include: (1) Studying the intrinsic relationship between the composition, microstructure, layer spacing as well as optical properties of two-dimensional atomic crystal molecular hybrid structures and plasma treatment parameters; (2) Exploring the physical mechanism of plasma-based two-dimensional atomic crystal molecular hybrid structures using a combination of experiment and theory; (3) Realizing the controllable preparation of semimetal-nanoparticles and studying their plasmonic mechanism; (4) Constructing two-dimensional atomic crystal molecular hybrid structure based photodetectors decorated by semimetal-nanoparticles and investigating their photoresponse performances. The project applicant is experienced in the research and development of two-dimensional materials and optoelectronic devices as well as plasma technologies. Moreover, the preliminary research work proves that this project is highly feasible. The research results may provide physical basis and application foundation for both the on-demand controllable preparation of two-dimensional atomic crystal molecular hybrid structures and the development of related optoelectronic devices.