Journal
APPLIED SURFACE SCIENCE
Volume 255, Issue 17, Pages 7679-7682Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2009.04.136
Keywords
Field emission; Graphite flake; Hydrogen thermal processing
Categories
Funding
- FED R&D Division at Tatung Company, Taiwan, ROC
- Chunghwa Picture Tubes Company, Taiwan, ROC
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In order to improve the field electron emission properties of the graphite, the carbon nanoparticles (CNPs) are synthesized on the micrographite flakes by hydrogen thermal processing. We spin the graphite solution on the silicon wafer and desiccate it, then produce the CNPs on the graphite flakes using hydrogen thermal processing in the furnace. The processing parameters such as the processing temperature, hydrogen flow rate and processing time, were varied to find the optimal conditions for the improvement of the field emission properties of the graphite flakes. The experimental results show that the field emission properties of the graphite flakes have glaring improvement after heat treatment owing to the increase of the defect density and the CNPs on above. The turn-on field was decreased from 7.7 of the untreated sample to 4.3 V/mu m of the treated sample at the optimal processing conditions. (C) 2009 Elsevier B. V. All rights reserved.
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