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Synthesis of free-standing ZnO/Zn core-shell micro-polyhedrons using thermal chemical vapor deposition  

Choi, Min-Yeol (School of Advanced Materials and System Engineering, Kumoh National Institute of Technology)
Park, Hyun-Kyu (School of Advanced Materials and System Engineering, Kumoh National Institute of Technology)
Jeong, Soon-Wook (School of Advanced Materials and System Engineering, Kumoh National Institute of Technology)
Kim, Sang-Woo (School of Advanced Materials and System Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.18, no.4, 2008 , pp. 155-159 More about this Journal
Abstract
In this work, we report synthesis of free-standing ZnO/Zn core-shell micro-polyhedrons using metal Zn pellets as a source material by the thermal chemical vapor deposition process. Scanning and transmission electron microscopy measurements were introduced to investigate morphologies and structural properties of as-grown ZnO/Zn core-shell micro-polyhedrons. It was found that micro-polyhedrons were composed of inner single-crystalline metal Zn surrounded by single-crystalline ZnO nanorod arrays. The inner single crystalline metal Zn with micro-scale diameter has a hexagonal crystal structure. Diameter and height of ZnO nanorods covering the metal Zn surface are below 10 nm and 100 nm, respectively. It was also confirmed that c-axis oriented ZnO nanorods are single crystalline with a hexagonal crystal structure.
Keywords
ZnO; Zn; Coreshell; Polyhedron; Nanorod; Hexagonal; Free standing; Thermal CVD;
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