【作者】 王新胜； 许冠辰； 卢至行； 张琪； 焦丽颖；

【Author】 X.Wang;G.Xu;Z.Lu;Q.Zhang;L.Jiao;Department of Chemistry,Tsinghua University;

【机构】 清华大学化学系； 清华大学；

【摘要】 以二硫化钼为代表的半导体性二维过渡金属硫化物蕴含着新奇的物理现象并呈现出优异的物理化学性质,在纳电子器件领域及新型光电器件领域具有重要的应用前景。我们围绕着二维过渡金属硫族化合物的控制合成、无损转移与物性表征开展了系列工作:建立了基于表面硫化机理的二硫化钼层数控制合成方法,获得了高结晶性与高性能的二维二硫化钼;通过前驱体的结构设计构筑了MoS2-WS2面内与层间杂化二维材料,研究了杂化对其能带结构、光谱、电学输运性质的影响;实现了少层二硫化钼二维原子晶体的低温生长;利用水溶性聚合物作为转移媒介实现了二维过渡金属硫化物的无损转移。此外,还研究了二维过渡金属硫化物的层数与尺寸对其物理、化学性质的影响。更多还原

【Abstract】 Semiconducting transition metal dichalcogenides(TMDCs), such as MoS2, have recently emerged as a family of 2D materials that are complementary to zero-bandgap graphene. However, the preparation of TMDCs atomic layers is still in its early stage and the controlled synthesis of these new materials remains a challenge. We focused on the controlled synthesis, transfer and characterizations of 2D TMDCs. We developed a few approaches for growing highly crystalline 2D TMDCs and their layered hybrids. We also utilized water soluble polymer films as transfer mediator for nondestructive transfer of 2D TMDCs. Moreover, we studied the layer and size effects on the physical and chemical properties of these 2D TMDCs in details.更多还原