title: Triangular ZnO nanosheets: synthesis, crystallography and cathodoluminescence.
abstract: ZnO nanosheets with triangular morphology have been synthesized on an Au-coated silicon substrate through a facile thermal evaporation process. The morphologies and microstructures of the nanosheets were studied by a scanning electron microscope (SEM) and a high-resolution transmission electron microscope (HR-TEM). These studies show that a nanosheet is commonly composed of two parts: a triangular ZnO sheet and an Au nanoparticle attached on its tip-end. Detailed crystallography analyses conclude that the formation of the highly crystalline nanostructures can be assigned to a combination of a vapor-liquid-solid (VLS) process that is believed to be responsible for its initial nucleation and subsequent crystallization along the growth direction, and a vapor-solid (VS) process that is responsible for its further radial growth. The spatially-resolved cathodoluminescence (CL) spectra exhibit a sharp strong near-band-edge (NBE) emission in the ultraviolet range and a negligible green emission.
authors.affiliation: School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Hu
authors.forename: Baodan
authors.initials: B
authors.lastname: Liu
authors.forename: Fang
authors.initials: F
authors.lastname: Yuan
authors.forename: Zaien
authors.initials: Z
authors.lastname: Wang
authors.forename: Nan
authors.initials: N
authors.lastname: Huang
authors.forename: Guifeng
authors.initials: G
authors.lastname: Zhang
authors.forename: Benjamin
authors.initials: B
authors.lastname: Dierre
authors.forename: Naoto
authors.initials: N
authors.lastname: Hirosaki
authors.forename: Takashi
authors.initials: T
authors.lastname: Sekiguchi
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Bando
authors.forename: Dmitri
authors.initials: D
authors.lastname: Golberg
authors.forename: Xin
authors.initials: X
authors.lastname: Jiang