Fabrication and Optical Behaviors of Core-Shell ZnS Nanostructures.
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.
Yang
Zai-Xing
ZX
Nanjing National Laboratory of Microstructures and Department of Physics, Nanjing University, 210093, Nanjing, People's Republic of China. wzhong@mail.nju.edu.cn.
Zhong
Wei
W
Deng
Yu
Y
Au
Chaktong
C
Du
You-Wei
YW