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The Effects of Growth Temperature on the Field‐Emission Properties of ZnO Nanoneedle Arrays
Author(s) -
Park Jae Young,
Oh Chang Won,
Choi SunWoo,
Kim Sang Sub
Publication year - 2009
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2009.03342.x
Subject(s) - nanoneedle , field electron emission , materials science , chemical vapor deposition , deposition (geology) , chemical engineering , optoelectronics , morphology (biology) , nanotechnology , metalorganic vapour phase epitaxy , nanostructure , epitaxy , layer (electronics) , paleontology , physics , genetics , quantum mechanics , sediment , engineering , biology , electron
Field‐emission properties of ZnO nanoneedle arrays (NNAs) grown on Pt‐coated Si (001) substrates by metalorganic chemical vapor deposition at various growth temperatures were investigated. Growth temperature determines the morphology and alignment of NNAs and hence their field‐emission properties. The ZnO NNAs grown at 550°C demonstrated better emission properties compared with ones grown at higher temperatures. ZnO NNAs grown at higher temperatures had sharper tips but were relatively less aligned, resulted in inferior field‐emission properties. Optimization of the shape and alignment of ZnO nanoneedles is important to obtain better emission properties.