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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemical engineering
Modulation of field emission properties of ZnO nanorods during arc discharge
Journal of Nanoscience and Nanotechnology, Volume 10, No. 12, Year 2010
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Description
Zinc oxide (ZnO) nanorods have been synthesized via the arc discharge method. Different oxygen partial pressures were applied in the arc discharge chamber to modulate the field emission properties of the as-synthesized ZnO nanorods. Scanning electron microscopy (SEM) was carried out to analyze the morphology of the ZnO nanorods. The ion beam analysis technique of proton induced X-ray emission (PIXE) was performed to probe the impurities in ZnO nanorods. SEM images clearly revealed the formation of randomly oriented ZnO nanorods with diameters between 10-50 nm. It was found that the morphology and the electrical properties of the ZnO nanorods were dependent on the oxygen partial pressure during arc discharge. In addition enhanced UV-sensitive photoconductivity was found for ZnO nanorods synthesized at high oxygen partial pressure during arc discharge. The field emission properties of the nanorods were studied. The turn-on field, which is defined at a current density of 10 μA cm -2, was about 3 V μm -1 for ZnO nanorods synthesized at 99% oxygen partial pressure during arc discharge. The turn-on field for ZnO nanorods increased with the decrease of oxygen partial pressure during arc discharge. The simplicity of the-synthesis route coupled with the modulation of field emission properties due to the arc discharge method make the ZnO nanorods a promising candidate for a low cost and compact cold cathode material. Copyright © 2010 American Scientific Publishers.
Authors & Co-Authors
Fang, F.
New Zealand, Lower Hutt
Gns Science
Kennedy, John Vedamuthu
New Zealand, Lower Hutt
Gns Science
Futter, John
New Zealand, Lower Hutt
Gns Science
Murmu, Peter Paul
New Zealand, Lower Hutt
Gns Science
Markwitz, A.
New Zealand, Lower Hutt
Gns Science
Statistics
Citations: 65
Authors: 5
Affiliations: 1
Identifiers
Doi:
10.1166/jnn.2010.3009
ISSN:
15334880
Research Areas
Environmental