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Browse Journals & Magazines > Journal of Vacuum Science & T ...> Volume:26 Issue:6 Help

Improved field emission properties from polycrystalline indium oxide-coated single-walled carbon nanotubes

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5 Author(s)
Jungwoo Lee ; Department of Chemistry, Hanyang University, Haengdang-dong 17, Seoul 133-791, Korea ; Lee, Wonjoo ; Sim, Kijo ; Han, Sung-Hwan
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Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1116/1.3006020 

The field emission (FE) characteristics of indium oxide (In2O3)-coated single-walled carbon nanotubes (SWCNTs) were studied. Scanning electron microscopy, x-ray diffractometer, and UV/visible spectroscopy confirmed that In2O3 exists as a polycrystalline cubic bixbyite structure on the surface of SWCNTs. The turn-on field of pristine SWCNTs decreased from 3.82 to 3.27 V/μm for In2O3-coated SWCNTs with optimal coating thickness. The maximum emission current density reached 3.5 mA/cm2, five times higher than that of pristine SWCNTs (0.68 mA/cm2) at an electric field of 7 V/μm. To explain the higher FE current density of In2O3-coated SWCNTs, Fowler–Nordheim plots were used with some assumptions.

Published in:
Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures  (Volume:26 ,  Issue: 6 )

Date of Publication: Nov 2008

Page(s):
1892 - 1895
ISSN :
1071-1023
Digital Object Identifier :
10.1116/1.3006020
Product Type:
Journals & Magazines
Date of Current Version :
18 June 2009
Issue Date :
Nov 2008

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