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Volume 14
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10.3390/nano14151260
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Article

Characteristics of Carbon Nanotube Cold Cathode Triode Electron Gun Driven by MOSFET Working at Subthreshold Region

by
Yajie Guo
,
Baohong Li
,
Yu Zhang
,
Shaozhi Deng
and
Jun Chen
*
State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China
*
Author to whom correspondence should be addressed.
Nanomaterials 2024, 14(15), 1260; https://doi.org/10.3390/nano14151260
Submission received: 8 July 2024 / Revised: 24 July 2024 / Accepted: 26 July 2024 / Published: 28 July 2024
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Abstract

The carbon nanotube cold cathode has important applications in the X-ray source, microwave tube, neutralizer, etc. In this study, the characteristics of carbon nanotube (CNT) electron gun in series with metal-oxide-semiconductor field-effect transistor (MOSFET) were studied. CNTs were prepared on a stainless steel substrate by chemical vapor deposition and assembled with a mesh gate to form an electron gun. The anode current of the electron gun can be accurately regulated by precisely controlling the MOSFET gate voltage in the subthreshold region from 1 to 40 µA. The current stability measurements show the cathode current fluctuation was 0.87% under 10 h continuous operation, and the corresponding anode current fluctuation was 2.3%. The result has demonstrated that the MOSFET can be applied for the precise control of the CNT electron gun and greatly improve current stability.
Keywords: carbon nanotube; field emission; cold cathode; MOSFET; electron gun carbon nanotube; field emission; cold cathode; MOSFET; electron gun

Share and Cite

MDPI and ACS Style

Guo, Y.; Li, B.; Zhang, Y.; Deng, S.; Chen, J. Characteristics of Carbon Nanotube Cold Cathode Triode Electron Gun Driven by MOSFET Working at Subthreshold Region. Nanomaterials 2024, 14, 1260. https://doi.org/10.3390/nano14151260

AMA Style

Guo Y, Li B, Zhang Y, Deng S, Chen J. Characteristics of Carbon Nanotube Cold Cathode Triode Electron Gun Driven by MOSFET Working at Subthreshold Region. Nanomaterials. 2024; 14(15):1260. https://doi.org/10.3390/nano14151260

Chicago/Turabian Style

Guo, Yajie, Baohong Li, Yu Zhang, Shaozhi Deng, and Jun Chen. 2024. "Characteristics of Carbon Nanotube Cold Cathode Triode Electron Gun Driven by MOSFET Working at Subthreshold Region" Nanomaterials 14, no. 15: 1260. https://doi.org/10.3390/nano14151260

APA Style

Guo, Y., Li, B., Zhang, Y., Deng, S., & Chen, J. (2024). Characteristics of Carbon Nanotube Cold Cathode Triode Electron Gun Driven by MOSFET Working at Subthreshold Region. Nanomaterials, 14(15), 1260. https://doi.org/10.3390/nano14151260

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