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Self-organized Zn/ZnO core-shelled hierarchical structures prepared by aqueous chemical growth

Published online by Cambridge University Press:  31 January 2011

C.Y. Kuan ,
J.M. Chou ,
I.C. Leu  and
M.H. Hon
C.Y. Kuan
Affiliation:
Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan, Republic of China
J.M. Chou
Affiliation:
Department of Materials Science and Engineering, I-Shou University, Kaohsiung Hsien 840, Taiwan, Republic of China
I.C. Leu*
Affiliation:
Department of Materials Science and Engineering, National United University, Miao-Li 360, Taiwan, Republic of China
M.H. Hon
Affiliation:
Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan, Republic of China
*
a)Address all correspondence to this author. e-mail: icleu@mail.mse.ncku.edu.tw
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Abstract

Self-assembled core-shelled hierarchical structures consisting of single-crystalline pyramid Zn microtip as a core, converted ZnO coating as the shell, and the grown ZnO nanowires as branches, have been prepared. Such ZnO hierarchical structures fabricated by a simple aqueous chemical growth method on Zn foil substrate are expected to be easily integrated into nanodevices. These self-organized structures are superior to both the random nanoarchitecture arrays formed in vapor system and the precipitated nanostructures suspended in the solution. Because of the easier transportation of electrons from the metallic core to ZnO branches, the self-assembled core-shelled hierarchical structures exhibit better field-emission characteristics.

Keywords

Field emissionSelf-assembly
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 4 , April 2008 , pp. 1163 - 1167
Copyright
Copyright © Materials Research Society 2008

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