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表面覆铪改善碳纳米管膜发射性能
Improved field emission of carbon nanotubes by hafnium coating
【摘要】 研究了表面沉积铪膜并进行后处理对碳纳米管膜场电子发射性能的影响。研究结果表明在适当的退火温度下碳纳米管表面形成了碳化铪,并显著提高了碳纳米管的发射电流密度、发射均匀性和发射稳定性。我们认为碳纳米管表面发射性能的提高归功于表面碳化铪膜良好的导电性、化学惰性和低逸出功。
【Abstract】 The field emission properties of hafnium coated carbon nanotubes(CNTs) were investigated.Result shows hafnium carbide formed on the surface of CNT films at annealing temperature of 1200℃,which improved the field emission current densities,emission uniformity and emission stability for CNT films.The improvement field emission by Hf coating on CNTs surface is attributed to the low work function,chemical inertness and good conductivity of HfC.
【关键词】 碳纳米管;
场发射;
碳化铪;
薄膜;
【Key words】 carbon nanotubes; field emission; hafnium carbide; thin films;
【Key words】 carbon nanotubes; field emission; hafnium carbide; thin films;
【基金】 国家重点基础研究发展计划(973计划)资助项目(G20000000672-2)
- 【文献出处】 功能材料 ,Journal of Functional Materials , 编辑部邮箱 ,2006年04期
- 【分类号】TB383.1
- 【被引频次】5
- 【下载频次】148