Quasi-freestanding, striped WS2 monolayer with an invariable band gap on   Au(001)

doi:10.1007/s12274-017-1601-8

CORC > 北京大学 > 化学与分子工程学院

	Quasi-freestanding, striped WS2 monolayer with an invariable band gap on Au(001)
	Hong, Min ; Zhou, Xiebo ; Shi, Jianping ; Qi, Yue ; Zhang, Zhepeng ; Fang, Qiyi ; Guo, Yaguang ; Sun, Yajuan ; Liu, Zhongfan ; Li, Yuanchang ; Wang, Qian ; Zhang, Yanfeng
刊名	NANO RESEARCH
	2017
关键词	WS2 Au(001) striped superstructure interfacial interaction STM/STS HEXAGONAL BORON-NITRIDE SINGLE-LAYER MOS2 MOLYBDENUM-DISULFIDE ELECTRONIC-PROPERTIES GRAIN-BOUNDARIES HETEROSTRUCTURES GRAPHENE PHOTOLUMINESCENCE DEFECTS
DOI	10.1007/s12274-017-1601-8
英文摘要	Revealing the structural/electronic features and interfacial interactions of monolayer MoS2 and WS2 on metals is essential to evaluating the performance of related devices. In this study, we focused on the atomic-scale features of monolayer WS2 on Au(001) synthesized via chemical vapor deposition. Scanning tunneling microscopy and spectroscopy reveal that the WS2/Au(001) system exhibits a striped superstructure similar to that of MoS2/Au(001) but weaker interfacial interactions, as evidenced by experimental and theoretical investigations. Specifically, the WS2/Au(001) band gap exhibits a relatively intrinsic value of similar to 2.0 eV. However, the band gap can gradually decrease to similar to 1.5 eV when the sample annealing temperature increases from similar to 370 to 720 degrees C. In addition, the doping level (or Fermi energy) of monolayer WS2/Au(001) varies little over the valley and ridge regions of the striped patterns because of the homogenous distributions of point defects introduced by annealing. Briefly, this work provides an in-depth investigation into the interfacial interactions and electronic properties of monolayer MX2 on metal substrates.; National Natural Science Foundation of China [51472008, 51290272]; National Key Research and Development Program of China [2016YFA0200103]; Beijing Municipal Science and Technology Planning Project [Z151100003315013]; Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics [KF201601]; ENN Energy Research Institute; SCI(E); ARTICLE; 11; 3875-3884; 10
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/484570]
专题	化学与分子工程学院工学院
推荐引用方式 GB/T 7714	Hong, Min,Zhou, Xiebo,Shi, Jianping,et al. Quasi-freestanding, striped WS2 monolayer with an invariable band gap on Au(001)[J]. NANO RESEARCH,2017.
APA	Hong, Min.,Zhou, Xiebo.,Shi, Jianping.,Qi, Yue.,Zhang, Zhepeng.,...&Zhang, Yanfeng.(2017).Quasi-freestanding, striped WS2 monolayer with an invariable band gap on Au(001).NANO RESEARCH.
MLA	Hong, Min,et al."Quasi-freestanding, striped WS2 monolayer with an invariable band gap on Au(001)".NANO RESEARCH (2017).