激光诱导铝基碳纳米管薄膜及场发射性能  

Laser-induced SWCNTs-Al thin film and field emission property

作　　者：刘璇[1] 孔龙[1] 王亚荣[1] 李必奎 王世明[1] 张亚非[2] 

机构地区：[1]上海海洋大学工程学院,上海201306 [2]上海交通大学微纳米科学技术研究院,上海200240

出　　处：《强激光与粒子束》2015年第12期227-231,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(51005145);上海市科委创新项目(12ZZ163);国家教育部重点项目(212056);上海市优秀技术带头人项目(14XD1424300);国家海洋局可再生能源专项(SHME2013JS01)

摘　　要：结合电泳沉积和激光纳米焊接技术在常温下成功制备了铝基单壁碳纳米管(SWCNTs-Al)薄膜。首先,将单壁碳纳米管电泳沉积到铝片基底上,再使用皮秒脉冲激光构建二者的可靠连接。对SWCNTsAl薄膜进行场发射性能测试,开启电压从焊接前的5.1V/μm降低到2.1V/μm,发射电流密度显著提高且更加稳定。这主要是激光纳米焊接后界面接触阻抗减小,场致电子发射更容易实现的结果。基于SWCNTs-Al薄膜的表面形貌图和场发射性能测试结果,确定了最优的激光纳米焊接参数。The single-walled carbon nanotubes-A1 （SWCNTs-A1） thin film is successfully fabricated by combining the elec-trophoretic deposition and laser nanowelding technology at room temperature. First, the single-walled carbon nanotubes are de-posited onto an A1 substrate by electrophoretic deposition, and then a reliable connection is constructed between them by pico-sec-ond pulsed laser. The field emission performance test results of the SWCNTs A1 thin film show that the turn-on voltage decreasesfrom 5.1 V/μm to 2.1 V/μm, and the emission current increases significantly and becomes more stable. This is mainly due to thereduction of contact resistance in welding area and easily moving electrons for field emission after laser nanowelding. Based on thesurface topography and the field emission property testing results of the SWCNTs-A1 thin film, the optimal laser nanowelding pa-rameters are determined, which are important for the development of nanowelding technology and the large-scale production ofnano-devices with ultra-high performance.

关 键 词：激光纳米焊接 单壁碳纳米管薄膜 阴极 场发射 

分 类 号：O462.4[理学—电子物理学]