title: van der Waals epitaxial ultrathin two-dimensional nonlayered semiconductor for highly efficient flexible optoelectronic devices.
abstract: Despite great progress in synthesis and application of graphene-like materials, it remains a considerable challenge to prepare two-dimensional (2D) nanostructures of nonlayered materials that may bring us surprising physical and chemical properties. Here, we propose a general strategy for the growth of 2D nonlayered materials by van der Waals epitaxy (vdWE) growth with two conditions: (1) the nonlayered materials satisfy 2D anisotropic growth and (2) the growth is implemented on the van der Waals substrates. Large-scale ultrathin 2D Pb(1-x)Sn(x)Se nanoplates (∼15-45 nm) have been produced on mica sheets by applying this strategy. Benefiting from the 2D geometry of Pb(1-x)Sn(x)Se nanoplates and the flexibility of mica sheet, flexible photodetectors that exhibit fast, reversible, and stable photoresponse and broad spectra detection ranging from UV to infrared light (375, 473, 632, 800, and 980 nm) are in situ fabricated based on Pb(1-x)Sn(x)Se nanoplates. We anticipate that more nonlayered materials will be developed into 2D nanostructures through vdWE, enabling the exploitation of novel electronic and optoelectronic devices.
authors.affiliation: National Center for Nanoscience and Technology , Beijing 100190, China.
authors.forename: Qisheng
authors.initials: Q
authors.lastname: Wang
authors.forename: Kai
authors.initials: K
authors.lastname: Xu
authors.forename: Zhenxing
authors.initials: Z
authors.lastname: Wang
authors.forename: Feng
authors.initials: F
authors.lastname: Wang
authors.forename: Yun
authors.initials: Y
authors.lastname: Huang
authors.forename: Muhammad
authors.initials: M
authors.lastname: Safdar
authors.forename: Xueying
authors.initials: X
authors.lastname: Zhan
authors.forename: Fengmei
authors.initials: F
authors.lastname: Wang
authors.forename: Zhongzhou
authors.initials: Z
authors.lastname: Cheng
authors.forename: Jun
authors.initials: J
authors.lastname: He
keywords: 2D nanostructures; flexible optoelectronic devices; nonlayered materials; van der Waals epitaxy