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Issue 11, 2017, Issue in Progress
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Electric field assisted growth and field emission properties of thermally oxidized CuO nanowires

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Abstract

An electric field was introduced into the thermal oxidation synthesis of CuO nanowires (NWs) by heating Cu foils at 400 °C under ambient conditions using a hotplate. The morphology and crystal structure of the NWs on both sides of the foils synthesized under different electric field intensities and directions were characterized. The results indicated that adding an electric field increases the length and density of the CuO NWs. Particularly, the electric field can promote the growth of the NWs with the growing direction parallel to the electric field through accelerating the diffusion of Cu ions. Interestingly, a downward electric field and an upward temperature gradient change the growth direction of NWs on the bottom surface of the Cu foils. Besides, adding a downward electric field can increase the yield of CuO NWs with large aspect ratio, as they can grow on both sides of the Cu foil. The field emission properties of CuO NWs obtained under different electric fields indicated that these nanowire arrays could be used as the cathode of field emission displays.

Graphical abstract: Electric field assisted growth and field emission properties of thermally oxidized CuO nanowires

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Supplementary files

Article information


Submitted
28 Nov 2016
Accepted
11 Jan 2017
First published
19 Jan 2017

This article is Open Access

RSC Adv., 2017,7, 6439-6446
Article type
Paper

Electric field assisted growth and field emission properties of thermally oxidized CuO nanowires

C. Tang, X. Liao, W. Zhong, H. Yu and Z. Liu, RSC Adv., 2017, 7, 6439
DOI: 10.1039/C6RA27426A

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    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
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    [Original citation] - Published by The Royal Society of Chemistry.

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