title: Fabrication and Optical Behaviors of Core-Shell ZnS Nanostructures.
abstract: Novel core-shell nanostructures comprised of cubic sphalerite and hexagonal wurtzite ZnS have been synthesized at 150°C by a simple hydrothermal method. The results of HR-TEM and SAED investigation reveal that the cores of hexagonal wurtzite ZnS (ca. 200 nm in average diameter) are encapsulated by a shell of cubic sphalerite ZnS. The FE-SEM image of the nanomaterials shows a surface tightly packed with nanoparticles (<10 nm in size). The optical properties of the fabricated material have been studied in terms of ultraviolet-visible absorption and photoluminescence. Furthermore, a possible mechanism for the fabrication of the core-shell nanostructures has been presented.
authors.affiliation: Nanjing National Laboratory of Microstructures and Department of Physics, Nanjing University, 210093, Nanjing, People's Republic of China. wzhong@mail.nju.edu.cn.
authors.forename: Zai-Xing
authors.initials: ZX
authors.lastname: Yang
authors.forename: Wei
authors.initials: W
authors.lastname: Zhong
authors.forename: Yu
authors.initials: Y
authors.lastname: Deng
authors.forename: Chaktong
authors.initials: C
authors.lastname: Au
authors.forename: You-Wei
authors.initials: YW
authors.lastname: Du