Tungsten oxide nanowires prepared by thermal oxidation for application in cold cathode flat panel x-ray source

被引：1

作者：

Liu, Qi ^{[1
]}

Lin, Zufang ^{[1
,2
]}

Song, Guichen ^{[1
]}

Kang, Song ^{[1
]}

Wang, Chengyun ^{[1
]}

Deng, Shaozhi ^{[1
]}

Xu, Ningsheng ^{[1
]}

Chen, Jun ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Sch Elect & Informat Technol, State Key Lab Optoelect Mat & Technol, Guangdong Prov Key Lab Display Mat & Technol, Guangzhou 510275, Peoples R China

[2] South China Agr Univ, Coll Elect Engn, Guangzhou 510642, Peoples R China

来源：

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B | 2025年 / 43卷 / 02期

关键词：

FIELD-EMISSION;

D O I：

10.1116/6.0004123

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Tungsten oxide (WO3-X) nanowire field emitters have important applications in vacuum microelectronic devices, such as cold cathode flat panel x-ray sources. In this study, large-area, high current density, and defect-rich monoclinic WO3-X nanowires were directly synthesized on a glass substrate by thermal oxidation. Field emission measurements from a 4.5 x 4.5 cm(2) sample show that a turn-on field of 4.8 MV/m and a high current density of 15.2 mA/cm(2) were achieved. Stable emission current with a fluctuation of 1.78% was obtained. Furthermore, a flat panel x-ray source with a reflective anode was fabricated using as-grown WO3-X nanowires as the cold cathode. A radiation dose rate of 1.83 mGy/s was obtained at an anode voltage of 60 kV and a current of 484.1 mu A. X-ray imaging experiments were carried out and clear imaging results were obtained. This work is significant for promoting the application of WO3-X nanowires in large-area field emission devices.

引用

页数：8

共 33 条

[1] Development of prototype backscatter X-ray security scanner for luggage inspection [J].