© 2018 IEEE.
In this invited talk, our recent progresses in the research of field emission from several oxide nanowires and their applications in vacuum microelectronic devices will be reviewed. Field emission properties from of CuO, WO
Chen Jun;Chen Yicong;Lin Zhufan;Zhao Long;Chen Daokun;Wang Kun;Zhang Zhipeng;Zhang Guofu;She Juncong;Deng Shaozhi;Xu Ningsheng
2018 31st International Vacuum Nanoelectronics Conference Ivnc 2018
2018
© 2019 American Chemical Society.
Light-matter resonance coupling is a long-studied topic for both fundamental research and photonic and optoelectronic applications. Here we investigated the resonance coupling between the magnetic dipole mode of a dielectric nanosphere and 2D excitons in a monolayer semiconductor. By coating an individual silicon nanosphere with a monolayer of WS
Wang Hao;Wen Jinxiu;Xu Ningsheng;Chen Huanjun;Deng Shaozhi;Wang Weiliang;Liu Pu;Yan Jiahao
ACS Nano
2019
© 2019 The Authors
Planar metallic nanoholes exhibit plasmonic resonances capable of confining electromagnetic fields down to the nanoscale, which can benefit the light–matter interactions at the nanoscale. In addition, they are more geometrically compatible with state-of-the-art microfabrication techniques in comparison with other types of plasmonic nanostructures of curved surfaces or protrusions. Two-dimensional transition metal dichalcogenides (TMDCs) are promising materials for studying light–matter interactions owing to their excellent optical properties. Herein, we propose a resonance plasmon–exciton coupling system based on the integration of monolayer tungsten disulfide (WS
Chen Xuexian;Wang Hao;Xu Ning-Sheng;Chen Huanjun;Deng Shaozhi
Applied Materials Today
2019
Copyright © 2019 American Chemical Society.
As a typical topological Kondo insulator, samarium hexaboride (SmB
Gan Haibo;Zhang Tong;Xu Ningsheng;Deng Shaozhi;Liu Fei;Ye Bicong;He Hongtao
Crystal Growth and Design
2019
This journal is © The Royal Society of Chemistry.
In pursuing high emission current density and high brightness, it is difficult to avoid vacuum breakdown in nanowire cold cathode systems, which will shorten the lifetime of the electron sources. Therefore, investigations on the vacuum breakdown process are important for semiconductor nanowire point electron sources. In this study, non-catastrophic breakdown phenomena that could extend the lifetime of the nanowire electron source were observed in the field emission processes of individual defective WO
Lin Zufang;Zhan Runze;Chen Yicong;She Juncong;Deng Shaozhi;Xu Ningsheng;Chen Jun
Nanoscale
2019
The building formation of a one-dimensional nanostructure greatly affects its physical properties. By controlling the supersaturation of deposited molybdenum (Mo) vapor, two kinds of nanostructure building formations can be synthesized in Mo nanocones (spiral- and stacking-type) through a thermal evaporation process. The field emission performances of these two formations are vastly different, particularly with respect to their high current properties. The maximum current of a spiral-type individual Mo nanocone is five times that of the stacking-type nanocone. Electrical transport may not be the decisive factor for this difference because both types of individual Mo nanocones have similar excellent conductivities. Heat conduction during the high current emission process has been considered a primary factor, and it strongly depends on the number of internal nanostructure boundaries in the Mo nanocone. These results indicate that nanostructure building formations with fewer inner boundaries in Mo nanocones contribute to a higher current field emission performance when applied to vacuum electron devices.
Yan Shen;宁生 许;少芝 邓;Shuai Tang;Yu Zhang;Fei Liu;军 陈
ACS applied materials & interfaces
2015-2-18
A study was performed on vacuum breakdown of carbon-nanotubes (CNT) field emitters on a silicon tip. The microwave plasma-enhanced chemical vapor deposition was used to grow CNT on the apex of a Si microtip. It was shown that the vacuum breakdown of the CNTs resulted in melting of the Si tip.
峻聪 佘;宁生 许;少芝 邓;军 陈;H. Bishop;S. E. Huq;L. Wang;D. Y. Zhong;恩哥 王
Applied Physics Letters
2003-9-29
Carbon nanotube (CNT) cathodes with different CNT contents were prepared by screen-printing method. The relationships among microstructure, emission properties and electrical characteristics of screen-printed CNT cathode were studied. It is found electrical characteristics of cathodes are affected by CNT content, and only cathode with appropriate CNT content has good field emission properties.
Jun Yu;军 陈;L. F. Zhu;峻聪 佘;少芝 邓;宁生 许
2007
Dendritic patterns generated in non-equilibrium growth processes are prevalent in nature while their formation mechanisms are far from fully understood. Here, we report a coverage-dependent fractal degree evolution of monolayer 2H-MoS2 dendrites synthesized on a symmetry-disparate substrate of SrTiO3 (001). Surprisingly, various characterizations have revealed that the monolayer dendrites featured with orthogonal backbones are single crystalline, possessing both peculiar adlayer-substrate interaction and abnormal indirect bandgap on SrTiO3 (001). Further theoretical calculations indicate that a prominent diffusion anisotropy of monomer precursors, combined with the disparate adlayer-substrate symmetry, determine the diffusion-limited aggregation of MoS2 towards dendritic shapes. This work provides brand-new insights in the morphological engineering of two-dimensional atomic crystals, and contributes greatly to an in-depth understanding of the detailed dynamics in non-equilibrium crystal growth.
Yu Zhang;Qingqing Ji;Jinxiu Wen;Jiu Li;Cong Li;Jianping Shi;Xiebo Zhou;Kebin Shi;Huanjun Chen;Yuanchang Li;少芝 邓;宁生 许;忠范 刘;Yanfeng Zhang
Advanced Functional Materials
2016-5-17
Details are given of an experimental study of the I-V characteristics and instability of the field electron emission from amorphous diamond films prepared using magnetic field-filtered ion deposition technique. A switch-on phenomenon is observed, and two types of instability are found, ie, fluctuation at low current and abrupt change in emission associated with local breakdown events at high current. Finally, it is found that, in order to establish a stable emission with current density approaching 50 mA/m2, it is necessary to undergo the switch-on and local breakdown process. These phenomena are characterized, and the physical mechanisms responsible for them are proposed.
军 陈;少芝 邓;X. G. Zhen;宁生 许
1998