Direct growth of tungsten oxide nanorods from heated tungsten foils

被引：0
作者：
JingFang Qin
GengMin Zhang
YingJie Xing
机构：
[1] Peking University,Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics
[2] Peking University,Academy for Advanced Interdisciplinary Studies
来源：
Science China Technological Sciences | 2012年 / 55卷
关键词：
W; O; fast heating CVD; field emission;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Tungsten oxide (W18O49) nanorods were grown by directly heating tungsten foils covered with potassium bromide (KBr) in low-pressure wet oxygen. The approach featured such advantages as convenient manipulation, low cost and rapid accessibility to high temperatures. A solid-liquid-solid (SLS) mechanism is believed to have dominated the growth process, in which the W18O49 nanorods segregated from eutectic droplets of potassium tungstate and tungsten oxide. The ultraviolet photoelectron spectroscopy (UPS) analysis disclosed that the valence band maximum (VBM) of these nanorods was approximately 9 eV below the vacuum level. The feasibility of using the such-fabricated nanorods as field emitters was tested and the related mechanism was also discussed.
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页码：1503 / 1508
页数：5
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