Open Access Nano Express

Fabrication and Optical Behaviors of Core–Shell ZnS Nanostructures

Zai-Xing Yang1, Wei Zhong1*, Yu Deng1, Chaktong Au2 and You-Wei Du1

Author affiliations

1 Nanjing National Laboratory of Microstructures and Department of Physics, Nanjing University, 210093, Nanjing, People’s Republic of China

2 Chemistry Department, Hong Kong Baptist University, Hong Kong, People’s Republic of China

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Citation and License

Nanoscale Research Letters 2010, 5:1124-1127  doi:10.1007/s11671-010-9612-3

Published: 24 April 2010

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.

Keywords:
ZnS; Core–shell nanostructures; Optical properties