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Improved field emission properties from polycrystalline indium oxide-coated single-walled carbon nanotubes
- Authors
- Lee, Jungwoo; Lee, Wonjoo; Sim, Kijo; Han, Sung-Hwan; Yi, Whikun
- Issue Date
- Nov-2008
- Publisher
- A V S AMER INST PHYSICS
- Keywords
- carbon nanotubes; coatings; field emission; indium compounds; scanning electron microscopy; ultraviolet spectra; visible spectra; X-ray diffraction
- Citation
- JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, v.26, no.6, pp.1892 - 1895
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
- Volume
- 26
- Number
- 6
- Start Page
- 1892
- End Page
- 1895
- ISSN
- 1071-1023
- Abstract
- 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/mu m for In2O3-coated SWCNTs with optimal coating thickness. The maximum emission current density reached 3.5 mA/cm(2), five times higher than that of pristine SWCNTs (0.68 mA/cm(2)) at an electric field of 7 V/mu m. To explain the higher FE current density of In2O3-coated SWCNTs, Fowler-Nordheim plots were used with some assumptions.
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Related Researcher
- Yi, Whi kun
- COLLEGE OF NATURAL SCIENCES (DEPARTMENT OF CHEMISTRY)