title: Growth of alloy MoS(2x)Se2(1-x) nanosheets with fully tunable chemical compositions and optical properties.
abstract: Band gap engineering of atomically thin two-dimensional layered materials is critical for their applications in nanoelectronics, optoelectronics, and photonics. Here we report, for the first time, a simple one-step chemical vapor deposition approach for the simultaneous growth of alloy MoS2xSe2(1-x) triangular nanosheets with complete composition tunability. Both the Raman and the photoluminescence studies show tunable optical properties consistent with composition of the alloy nanosheets. Importantly, all samples show a single bandedge emission peak, with the spectral peak position shifting from 668 nm (for pure MoS2) to 795 nm (for pure MoSe2), indicating the high quality for these complete composition alloy nanosheets. These band gap engineered 2D structures could open up an exciting opportunity for probing their fundamental physical properties in 2D and may find diverse applications in functional electronic/optoelectronic devices.
authors.affiliation: Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University , Changsha, Hunan 410082, P. R. China.
authors.forename: Honglai
authors.initials: H
authors.lastname: Li
authors.forename: Xidong
authors.initials: X
authors.lastname: Duan
authors.forename: Xueping
authors.initials: X
authors.lastname: Wu
authors.forename: Xiujuan
authors.initials: X
authors.lastname: Zhuang
authors.forename: Hong
authors.initials: H
authors.lastname: Zhou
authors.forename: Qinglin
authors.initials: Q
authors.lastname: Zhang
authors.forename: Xiaoli
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authors.lastname: Zhu
authors.forename: Wei
authors.initials: W
authors.lastname: Hu
authors.forename: Pinyun
authors.initials: P
authors.lastname: Ren
authors.forename: Pengfei
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authors.lastname: Guo
authors.forename: Liang
authors.initials: L
authors.lastname: Ma
authors.forename: Xiaopeng
authors.initials: X
authors.lastname: Fan
authors.forename: Xiaoxia
authors.initials: X
authors.lastname: Wang
authors.forename: Jinyou
authors.initials: J
authors.lastname: Xu
authors.forename: Anlian
authors.initials: A
authors.lastname: Pan
authors.forename: Xiangfeng
authors.initials: X
authors.lastname: Duan