Synthesis and atmospheric pressure field emission operation of W18O49 nanorods

被引：27
作者：
Agiral, Anil [1 ]
Gardeniers, J. G. E. [1 ]
机构：
[1] Univ Twente, MESA Inst Nanotechnol, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 39期
关键词：
D O I：
10.1021/jp802756y
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Tungsten oxide W18O49 nanorods with diameters of 15-20 nm were grown on tungsten thin films exposed to ethene and nitrogen at 700 degrees C at atmospheric pressure. It was found that tungsten carbide formation enhances nucleation and growth of nanorods. Atmospheric pressure field emission measurements in air showed a turn-on field of 3.3 V/mu m and stable and reproducible emission current density (28 mA/cm(2)). At low current densities (<20 mA/cm(2)), the field emission current follows the Fowler-Nordheim model; saturation effects were observed above 20 mA/cm(2).
引用
收藏
页码：15183 / 15189
页数：7
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