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Growth and characterization of gallium nitride nanowires produced on different sol-gel derived catalyst dispersed in titania and polyvinyl alcohol matrix

Published online by Cambridge University Press:  03 March 2011

A. Chatterjee ,
S. Chattopadhyay ,
C.W. Hsu ,
C.H. Shen ,
L.C. Chen ,
C.C. Chen ,
K.H. Chen  and
H.Y. Lee
A. Chatterjee
Affiliation:
Center for Condensed Matter Sciences, National Taiwan University, Taipei-106, Taiwan
S. Chattopadhyay*
Affiliation:
Institute of Atomic & Molecular Sciences, Academia Sinica, Taipei-106, Taiwan
C.W. Hsu
Affiliation:
Department of Chemistry, National Taiwan Normal University, Taipei-116, Taiwan
C.H. Shen
Affiliation:
Institute of Atomic & Molecular Sciences, Academia Sinica, Taipei-106, Taiwan
L.C. Chen
Affiliation:
Center for Condensed Matter Sciences, National Taiwan University, Taipei-106, Taiwan
C.C. Chen
Affiliation:
Department of Chemistry, National Taiwan Normal University, Taipei-116, Taiwan
K.H. Chen
Affiliation:
Institute of Atomic & Molecular Sciences, Academia Sinica, Taipei-106, Taiwan
H.Y. Lee
Affiliation:
Research Division, Synchrotron Radiation Research Center, Hsinchu, Taiwan
*
a) Address all correspondence to this author. e-mail: sur@diamond.iams.sinica.edu.tw
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Abstract

Sol-gel derived catalyst systems of cobalt, nickel, and iron were used in the growth of gallium nitride (GaN) nanowires by thermal chemical vapor deposition. A diffusion barrier matrix of titania (TiO2) has been used in which the catalysts were dispersed to have control of the catalyst particle sizes and hence on the size and morphology of the GaN nanowires. This single-step and cost-effective processing of the catalyst bed produced good-quality GaN naowires with comparable structural and optical properties with those previously reported. In a particular case, a stress-induced cubic admixture to the otherwise hexagonal structural symmetry was observed. The samples were characterized by high-resolution scanning electron microscopy, x-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, and cathodo-luminescence studies.

Keywords

Sol-gelMicrostructureNanoscale
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 6 , June 2004 , pp. 1768 - 1774
Copyright
Copyright © Materials Research Society 2004

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