Unravelling Orientation Distribution and Merging Behavior of Mono layer   MoS2 Domains on Sapphire

doi:10.1021/n150337321

CORC > 北京大学 > 化学与分子工程学院

	Unravelling Orientation Distribution and Merging Behavior of Mono layer MoS2 Domains on Sapphire
	Ji, Qingqing ; Kan, Min ; Zhang, Yu ; Guo, Yao ; Ma, Donglin ; Shi, Jianping ; Sun, Qiang ; Chen, Qing ; Zhang, Yanfeng ; Liu, Zhongfan
刊名	nano letters
	2015
关键词	Molybdenum disulfide chemical vapor deposition controllable synthesis grain boundary polycrystallinity CHEMICAL-VAPOR-DEPOSITION MONOLAYER MOLYBDENUM-DISULFIDE HIGH-QUALITY MONOLAYER LARGE-AREA CONTROLLED GROWTH GRAIN-BOUNDARIES GRAPHENE FILMS ATOMIC LAYERS PHOTOLUMINESCENCE EPITAXY
DOI	10.1021/n150337321
英文摘要	Monolayer MoS2 prepared by chemical vapor deposition (CVD) has a highly polycrystalline nature largely because of the coalescence of misoriented domains, which severely hinders its future applications. Identifying and even controlling the orientations of individual domains and understanding their merging behavior therefore hold fundamental significance. In this work, by using single-crystalline sapphire (0001) substrates, we designed the CVD growth of monolayer MoS2 triangles and their polycrystalline aggregates for such purposes. The obtained triangular MoS2 domains on sapphire were found to distributively align in two directions, which, as supported by density functional theory calculations, should be attributed to the relatively small fluctuations of the interface binding energy around the two primary orientations. Using dark-field transmission electron microscopy, we further imaged the grain boundaries of the aggregating domains and determined their prevalent armchair crystallographic orientations with respect to the adjacent MoS2 lattice. The coalescence of individual triangular flakes governed by unique kinetic processes is proposed for the polycrystal formation. These findings are expected to shed light on the controlled MoS2 growth toward predefined domain orientation and large domain size, thus enabling its versatile applications in next-generation nanoelectronics and optoelectronics.; Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter; SCI(E); EI; 1; ARTICLE; yanfengzhang@pku.edu.cn; zfliu@pku.edu.cn; 1; 198-205; 15
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/312656]
专题	化学与分子工程学院信息科学技术学院工学院
推荐引用方式 GB/T 7714	Ji, Qingqing,Kan, Min,Zhang, Yu,et al. Unravelling Orientation Distribution and Merging Behavior of Mono layer MoS2 Domains on Sapphire[J]. nano letters,2015.
APA	Ji, Qingqing.,Kan, Min.,Zhang, Yu.,Guo, Yao.,Ma, Donglin.,...&Liu, Zhongfan.(2015).Unravelling Orientation Distribution and Merging Behavior of Mono layer MoS2 Domains on Sapphire.nano letters.
MLA	Ji, Qingqing,et al."Unravelling Orientation Distribution and Merging Behavior of Mono layer MoS2 Domains on Sapphire".nano letters (2015).