title: Microstructures and photoluminescence properties of three-dimensional multi-layered ZnO flowers by surfactant-free hydrothermal method.
abstract: In this paper, a large-scale of three-dimensional multi-layered ZnO flowers constructed by porous nanosheets were fabricated on Zn foils through a surfactant-free hydrothermal method. The morphology and microstructures of precursors and the mesoporous ZnO flowers were revealed by scanning electron microscopy. Based on the urea hydrolyzation, a possible growth mechanism of etching-deposition was proposed. The quantities and sizes of ZnO petals can be turned by urea concentration variations. The optical properties of the multi-layered ZnO flowers prepared with variety urea contents were also investigated by room temperature photoluminescence spectroscopy and showed the lower urea added sample has better crystalline quality.
authors.affiliation: Heilongjiang Key Laboratory for Advanced Functional Materials and Excited State Processes, Department of Physics, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China.
authors.forename: Lingling
authors.initials: L
authors.lastname: Xu
authors.forename: Hong
authors.initials: H
authors.lastname: Gao
authors.forename: Zeming
authors.initials: Z
authors.lastname: Li
authors.forename: Wei
authors.initials: W
authors.lastname: Lv
authors.forename: Jia
authors.initials: J
authors.lastname: Liu