期刊
MATERIALS LETTERS
卷 59, 期 14-15, 页码 1866-1870出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2005.02.001
关键词
zinc oxide nanoneedles; thermal evaporation; field emission
Tetrapod-like zinc oxide (ZnO) nanoneedles were fabricated using a simple and economical method of rapid heating high purity zinc powders at 900 degrees C. No catalyst and vacuum were employed in the experiment. Field-emission measurements showed that the turn-on field of the synthesized tetrapod-like ZnO nanoneedles was as low as 1.8 V/mu m at the emission current density of 1.0 mu A/cm(2) and the emission current density reached 1.0 mA/cm(2) under an applied field of about 3.9 V/mu m. The low turn-on field, high emission current density, and good electron emission stability make the ZnO nanoneedles one of the promising candidates for field-emission displays. (c) 2005 Elsevier B.V. All rights reserved.
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