Results 31 to 40 of about 430,041 (313)

Microconical Structure Formation and Field Emission From Atomically Heterogeneous Surfaces Created by Microwave Plasma–Based Low-Energy Ion Beams

Frontiers in Physics, 2021
We report the formation of self-organized microconical arrays on copper surface when exposed to high flux (5.4 × 1015 cm−2 s−1) of 2 keV argon ion beams at normal incidence. The created microconical arrays are explored for field emission properties.
Jayashree Majumdar, Sudeep Bhattacharjee
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Fabrication and Simulation of Self-Focusing Field Emission X-ray Tubes

Applied Sciences, 2015
A self-focusing field emission (FE) X-ray tube with a large-area cathode design was simulated and fabricated. The designed X-ray tube had a cylindrically symmetric geometry; the diameter of the cathode and the anode was 15 mm, and the cathode-anode ...
Kevin Cheng, Yi-Ping Chou, Meng-Jey Youh, Yih-Ming Liu, Ming-Der Ger, Kung-Hsu Hou, Nen-Wen Pu   +6 more
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A Cylindrical Triode Ultrahigh Vacuum Ionization Gauge with a Carbon Nanotube Cathode

Nanomaterials, 2021
In this study, a cylindrical triode ultrahigh vacuum ionization gauge with a screen-printed carbon nanotube (CNT) electron source was developed, and its metrological performance in different gases was systematically investigated using an ultrahigh vacuum
Jian Zhang, Jianping Wei, Detian Li, Huzhong Zhang, Yongjun Wang, Xiaobing Zhang   +5 more
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Enhanced Field Emission of Single-Wall Carbon Nanotube Cathode Prepared by Screen Printing with a Silver Paste Buffer Layer

Nanomaterials, 2022
A high emission current with relatively low operating voltage is critical for field emission cathodes in vacuum electronic devices (VEDs). This paper studied the field emission performance of single-wall carbon nanotube (SWCNT) cold cathodes prepared by ...
Ruirui Jiang, Jianlong Liu, Kaiqiang Yang, Jing Zhao, Baoqing Zeng   +4 more
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2D Porous ZnO Nanosheets: One Pot Synthesis with Low Turn-on Field [PDF]

Journal of Nanostructures, 2018
Low turn-on field of 2.3 V/µm was found for the emission current density of 10 µA/cm2 from 2D porous ZnO nanosheets. High current density of 0.76 mA/cm2 was drawn at an applied field of 4.1 V/µm.
Prashant Baviskar, Girish Patil, Vivekanand Bagal, Babasaheb Sankapal, Padmakar Chavan   +4 more
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Theoretical Study of a 0.22 THz Backward Wave Oscillator Based on a Dual-Gridded, Carbon-Nanotube Cold Cathode

Applied Sciences, 2018
The carbon nanotube (CNT) cold cathode is an attractive choice for millimeter and terahertz vacuum electronic devices owning to its unique instant switch-on and high emission current density.
Qingyun Chen, Xuesong Yuan, Matthew T. Cole, Yu Zhang, Lin Meng, Yang Yan   +5 more
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Proof-of-Concept Vacuum Microelectronic NOR Gate Fabricated Using Microelectromechanical Systems and Carbon Nanotube Field Emitters

Micromachines, 2023
This paper demonstrates a fully integrated vacuum microelectronic NOR logic gate fabricated using microfabricated polysilicon panels oriented perpendicular to the device substrate with integrated carbon nanotube (CNT) field emission cathodes.
Tasso von Windheim, Kristin H. Gilchrist, Charles B. Parker, Stephen Hall, James B. Carlson, David Stokes, Nicholas G. Baldasaro, Charles T. Hess, Leif Scheick, Bernard Rax, Brian Stoner, Jeffrey T. Glass, Jason J. Amsden   +12 more
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Investigation of the Pulsing Characteristic of a Carbon Nanotube Emitter

Nanomaterials, 2022
The carbon nanotube (CNT) field emitter is suitable for the high frequency pulsing of X-ray. Pulsing reduces 49% of the dose in grid-controlled fluoroscopy and improves the image of moving objects. Various structures and manufacturing processes are being
Helin Zhu, Jejin Jang, Gyuwan Im, Hyungsoo Mok, Jehwang Ryu, Kyung-Seo Kim   +5 more
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Field Emission of Multi-Walled Carbon Nanotubes from Pt-Assisted Chemical Vapor Deposition

Nanomaterials, 2022
Multi-walled carbon nanotubes (MWNTs) were grown directly on a metal substrate with the assistance of Pt using a chemical vapor deposition method. In addition, the growth mechanism of Pt-assisted catalytic CNT was discussed.
Hongbin Tang, Ruizi Liu, Weijun Huang, Wei Zhu, Weijin Qian, Changkun Dong   +5 more
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High Current Field Emission from Large-Area Indium Doped ZnO Nanowire Field Emitter Arrays for Flat-Panel X-ray Source Application

Nanomaterials, 2021
Large-area zinc oxide (ZnO) nanowire arrays have important applications in flat-panel X-ray sources and detectors. Doping is an effective way to enhance the emission current by changing the nanowire conductivity and the lattice structure.
Yangyang Zhao, Yicong Chen, Guofu Zhang, Runze Zhan, Juncong She, Shaozhi Deng, Jun Chen   +6 more
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