title: Monolayer-by-monolayer stacked pyramid-like MoS2 nanodots on monolayered MoS2 flakes with enhanced photoluminescence.
abstract: The precise control of the morphology and crystal shape of MoS2 nanostructures is of particular importance for their application in nanoelectronic and optoelectronic devices. Here, we describe a single step route for the synthesis of monolayer-by-monolayer stacked pyramid-like MoS2 nanodots on monolayered MoS2 flakes using a chemical vapor deposition method. First-principles calculations demonstrated that the bandgap of the pyramid-like MoS2 nanodot is a direct bandgap. Enhanced local photoluminescence emission was observed in the pyramid-like MoS2 nanodot, in comparison with monolayered MoS2 flakes. The findings presented here provide new opportunities to tailor the physical properties of MoS2via morphology-controlled synthesis.
authors.affiliation: Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Key Laboratory of Photoelectronics and Telecommunication, School of Physics, Communication and Electronics, Jiangxi Normal University, Nanchang 330022, Jiangxi, China. clyuan@jxnu.edu.cn xfluo@jxnu.edu.cn.
authors.forename: Cailei
authors.initials: C
authors.lastname: Yuan
authors.forename: Yingjie
authors.initials: Y
authors.lastname: Cao
authors.forename: Xingfang
authors.initials: X
authors.lastname: Luo
authors.forename: Ting
authors.initials: T
authors.lastname: Yu
authors.forename: Zhenping
authors.initials: Z
authors.lastname: Huang
authors.forename: Bo
authors.initials: B
authors.lastname: Xu
authors.forename: Yong
authors.initials: Y
authors.lastname: Yang
authors.forename: Qinliang
authors.initials: Q
authors.lastname: Li
authors.forename: Gang
authors.initials: G
authors.lastname: Gu
authors.forename: Wen
authors.initials: W
authors.lastname: Lei