单层硒化铜表面高密度周期性二维磁性纳米团簇的可控制备及其电学表征

Two-dimensional (2D) materials have diverse properties and its unique physical properties provide a new opportunity for constructing new-types of electronic devices. Magnetic materials is one of the most widely used materials and have always been an important pillar and a solid foundation for national economy and defense industries. How to combine the 2D materials and the magnetic materials in an orderly manner, exploiting respective advantages to the full, is an original and important research topic. However, until now the relevant research reports are scarce and the method for controllable preparation of 2D materials is missing. In this project, we plan to explore the controllable preparations of 2D materials functionalized by 2D magnetic nanoclusters based on the first intrinsically patterned single-layered copper selenide 2D atomic crystal materials. We will take the triangular-shaped nanopores arranged periodically on the surface of intrinsically patterned single-layer copper selenide 2D atomic crystal materials as a template, and deposit magnetic atoms onto the copper selenide surface. Through precisely controlling the evaporation temperature, deposition time and growth temperature, we plan to construct large-scale (centimeter size), high-density (1.28 x 10^13 /cm^2), periodic (3 nm), uniform morphology 2D magnetic nanoclusters arrays and explore their precise atomic structure, electronic and quantum properties. This project realizes the combination of 2D atomic crystal materials and the magnetic materials and provides a new idea for the applications based on functionalized 2D materials.

二维材料性质各异，其独特的物理性质为构筑新型电子器件提供了机遇。磁性材料用途广泛，是国民经济和国防工业的重要支柱和坚实基础。将二者有序地结合起来，集成各自优势和特点，构筑功能化的二维材料，是一个新颖且重要的研究方向。然而，目前相关研究报道较少，可控制备方法缺失。因此，本项目基于首个具有自然图案化的单层硒化铜二维原子晶体材料，探索了二维磁性纳米团簇功能化的二维材料的可控制备。以单层硒化铜表面周期排列的三角形孔洞为模板，利用分子束外延技术，将磁性金属原子引入到表面，通过精确调控蒸发温度、沉积时间、生长温度等参数，在硒化铜表面构筑大面积(厘米尺寸)、高密度(1.28x10^13/cm^2)、周期性(3nm)、形貌均一的二维磁性纳米团簇阵列，并探究其精确的原子结构和电学特性。本项目实现了二维材料与磁性材料的有机结合，为功能化二维材料在器件领域的应用提供了新思路。

原子级精准构筑二维原子晶体材料及其表面功能化研究是当今国际上重要的研究领域之一。本项目针对二维原子晶体材料的精准构筑及其表面可控功能化开展了深入系统研究，取得了创新性研究成果包括：1)研究了铁、钴、镍三种磁性原子在周期纳米孔洞单层硒化铜表面的选择性吸附行为，获得了铁原子和镍原子二维磁性纳米团簇的电学特性；2）原子级精准构筑了单层硒化银和单层二硒化五银两种新型二维原子晶体材料，研究了其电学特性及拓扑物性，实现了有机分子在其表面的选择性吸附并构造了分子围栏结构；3）精准调控了单层硒化铜的周期纳米孔洞超结构和一维莫尔条纹超结构，发现了中间过渡态结构的单层硒化铜，并构筑了基于单层硒化铜的面内异质结。在项目执行期间，以第一作者和通讯作者（含共一和共通讯）共发表SCI论文20篇，包括Angewandte Chemie-International Edition 1篇、Nano Research 1篇，Nanoscale 1篇、Applied Surface Science 2篇、Materials Today Physics 1篇；授权专利1项，受理发明专利7项；获批国家自然科学基金委面上项目1项，云南省优秀青年科学基金项目1项；作为团队核心骨干获批云南省“兴滇英才支持计划”创新创业团队和云南省教育厅石墨烯应用工程研究中心。

内容获取失败，请点击重试