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Spectrophotometric Investigation on the Growth Mechanism of a Single Tapered CuO Nanowire

Published online by Cambridge University Press:  31 January 2011

Anindita Chatterjee ,
C-Y Huang ,
S-B Liu ,
S-Y Wu  and
Chia-Liang Cheng
Anindita Chatterjee
Affiliation:
anindita@mail.ndhu.edu.twanindita.chemistry@gmail.com, National Dong Hwa University, Physics, Hualien, Taiwan, Province of China
C-Y Huang
Affiliation:
milky.huang@msa.hinet.net, National Dong Hwa University, Physics, hualien, Taiwan, Province of China
S-B Liu
Affiliation:
m9514024@em95.ndhu.edu.tw, National Dong Hwa University, Physics, Hualien, Taiwan, Province of China
S-Y Wu
Affiliation:
sywu@mail.ndhu.edu.tw, National Dong Hwa University, Physics, Hualien, Taiwan, Province of China
Chia-Liang Cheng
Affiliation:
clcheng@mail.ndhu.edu.tw
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Abstract

In this study, well separated tapered CuO nanowires have been synthesized on copper grid using an easy and cost effective thermal oxidation method. A set of spectroscopic investigations have been performed on one single tapered CuO nanowire using Energy Dispersive X-ray, confocal Raman and confocal Photoluminescence spectroscopy to get insight into the mechanism of growth of the nanowires. Energy Dispersive X-ray studies reveal crystallization process of CuO nanowires occur from Cu/Cu2O mixed phase state to pure CuO structure. Raman measurements indicate a little sharpening of the Raman peaks with increasing growth temperature of the nanowires starting from 400°C to 600°C. Photoluminescence studies were carried out by mapping along the length of the nanowire to investigate the growth as well as optical properties of a single tapered CuO nanowire. As the diameter of the single tapered CuO nanowire decreases, the green emission of the nanowire gradually shifts towards the higher energy side. A steady blue shift of 20 nm of the photoluminescence peak has been attributed to the nanosize effect of the tapered nanowire along the length and enhanced surface defects.

Keywords

photoemissionnanostructureRaman spectroscopy
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1206: Symposium M – Multifunction at the Nanoscale through Nanowires , 2009 , 1206-M16-10
Copyright
Copyright © Materials Research Society 2010

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