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 基于单壁碳纳米管与镍基底的超声纳米焊接及场发射性能研究(英文)(PDF)

《纳米技术与精密工程》[ISSN:1672-6030/CN:12-1351/O3]

期数:
2016年5期
页码:
379-383
栏目:
纳米技术
出版日期:
2016-09-15

文章信息/Info

Title:
 Field Emission of Single-Walled Carbon Nanotubes Welded on Ni
Substrate by Ultrasonic Nanowelding
作者:
 刘璇1 王亚荣1 李必奎1 王鹏波1 王世明1 张亚非2
1. 上海海洋大学工程学院,上海201306;
2. 上海交通大学微纳科学技术研究院,薄膜与微细科技教育部重点实验室,上海200240
Author(s):
 Liu Xuan1 Wang Yarong1 Li Bikui1 Wang Pengbo1 Wang Shiming1 Zhang Yafei2
1. College of Engineering Science and Technology, Shanghai Ocean University, Shanghai 201306, China;
2. Key Laboratory for Thin Film and Microfabrication Technology of Ministry of Education, Research Institute of Micro/Nanometer Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, China
关键词:
 超声纳米焊接 单壁碳纳米管薄膜 镍基底 场发射性能 尖端 接触电阻
Keywords:
ultrasonic nanowelding singlewalled carbon nanotube film Ni substrate electron field emission characteristic tip contact resistance
分类号:
TN305.99; O462.4
DOI:
10.13494/j.npe.20150079
文献标识码:
A
摘要:
超声纳米焊接技术被用来改善单壁碳纳米管(SWNTs)的场发射性能.利用电泳沉积的方法将SWNTs沉积在镍衬底上形成SWNT薄膜.将沉积有SWNT薄膜的样品进行超声纳米焊接.在高频超声能量和压紧力的共同作用下,金属镍首先发生软化,使得SWNTs很容易埋入镍中,从而两者形成了可靠的连接.扫描电子显微镜形貌图展示了SWNTs被嵌入了镍金属层中.作为稳定的发射极,焊接后的样品展现出了更加优异的场发射性能:较低的开启电压、较高的发射电流密度和更加稳定的发射电流.这主要是因为焊头表面的小突起更有利于SWNTs的端部翘起,小的接触电阻有助于电子发射的结果.大面积纳米焊接技术的使用可提高纳米焊接效率,加速大规模制备SWNT场致发射阴极.
Abstract:
 Ultrasonic nanowelding technology was used to improve the electron field emission characteristics of single-walled carbon nanotubes (SWNTs), which were deposited on the Ni substrate by electrophoretic deposition. The samples of sedimentary SWNT film were applied to ultrasonic nanowelding. Under the combined effect of high-frequency ultrasonic energy and clamping force, Ni was softened so that the SWNTs were easily wrapped up, where a reliable contact between SWNTs and Ni substrate was formed. The scanning electron microscopy results showed that SWNTs were embedded into the Ni substrate and acted as stable filed emitter. The welded cathode demonstrated the enhanced electron field emission characteristics of lower turn-on voltage, higher emission current density and stable emission current. These can be attributed to the raised tips of SWNTs under the action of small protrusions on the welding head, as well as the reduction of contact resistance after nanowelding. By using the large-area nanowelding technique, higher efficiency can be realized and the progress in manufacturing large-scale SWNT cathode can be accelerated.

参考文献/References

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备注/Memo

备注/Memo:
收稿日期: 2016-05-29.
基金项目: 国家自然科学基金资助项目(51005145);教育部科学技术研究重点资助项目(212056);上海市教委重点创新资助项目(12ZZ163);上海市优秀技术带头人资助项目(14XD1424300);国家海洋局可再生能源专项(SHWE2013JS01).
作者简介: 刘璇(1975—),女,副教授,博士.
通讯作者: 张亚非,教授,yfzhang@sjtu.edu.cn.
更新日期/Last Update: 2016-09-19