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Research Paper

Applied Science and Convergence Technology 2014; 23(5): 301-307

Published online September 30, 2014

Copyright © The Korean Vacuum Society.

Fabrication of SnO2/Zn Core-shell Nanowires and
Photoluminescence Properties

Myung Ho Konga, Yong Jung Kwonb, Hong Yeon Chob, and Hyoun Woo Kimb*

aIndustrial Technology Support Devision, Korea Institute of Materials Science
bDivision of Materials Science and Engineering, Hanyang University

Correspondence to:Hyoun Woo Kimb*

Received: September 24, 2014; Revised: September 29, 2014; Accepted: September 30, 2014

Abstract

We have fabricated SnO2/Zn core-shell nanowires by employing a sputtering technique
with a Zn target. Scanning electron microscopy indicated that the surface of the nanowires
became rougher by the coating. X-ray diffraction of the coated nanowires exhibited the
hexagonal Zn diffraction peaks. TEM image of coated structures showed that shell layer was
mainly comprised of hexagonal Zn phase. EDX spectra suggested that the shell layer consisted
of Zn elements. The photoluminescence spectrum of the coated nanowires in conjunction
with Gaussian fitting analysis revealed that the emission was disconvoluted with three
Gaussian functions, which are centered at 2.1 eV in the yellow region, 2.4 eV in the green
region, and 3.3 eV in the ultraviolet region. We speculated the possible mechanisms of these
emission peaks.

Keywords: SnO2 nanowires, Zn shell, Photoluminescence

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