| In situ fabrication of HfC-decorated carbon nanotube yarns and their field-emission properties | |
| Yang, Yuanchao ; Liu, Liang ; Wei, Yang ; Liu, Peng ; Jiang, Kaili ; Li, Qunqing ; Fan, Shoushan | |
| 2010-10-12 ; 2010-10-12 | |
| 关键词 | NANORODS CARBIDE ARRAYS Chemistry, Physical Materials Science, Multidisciplinary |
| 中文摘要 | HfC-decorated carbon nanotube (CNT) yarns have been fabricated by pre-coating pure CNT yarns with Hf and in situ current heating in vacuum. HfC nanocrystals were formed at about 1600 K through reaction of the CNTs with Hf. The fabricated HfC-CNT yarns had a work function of 3.9 eV, lower than that of pure CNT yarns. For field-emission applications, HfC-CNT sharp tips made up of HfC nanorods were obtained by Joule-heating-induced electrical breakdown above 2100 K. Their emission current could reach 320 mu A with a calculated density of 800 A/cm(2) at an extraction voltage of 400 V. The emitters could operate under a rough vacuum of 10(-2) Pa without obvious degradation. These excellent field-emission properties are attributed to the HfC nanorods, which have a low work function and are resistant to ion bombardment. (c) 2009 Elsevier Ltd. All rights reserved. |
| 语种 | 英语 ; 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD ; OXFORD ; THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/81636]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | Yang, Yuanchao,Liu, Liang,Wei, Yang,et al. In situ fabrication of HfC-decorated carbon nanotube yarns and their field-emission properties[J],2010, 2010. |
| APA | Yang, Yuanchao.,Liu, Liang.,Wei, Yang.,Liu, Peng.,Jiang, Kaili.,...&Fan, Shoushan.(2010).In situ fabrication of HfC-decorated carbon nanotube yarns and their field-emission properties.. |
| MLA | Yang, Yuanchao,et al."In situ fabrication of HfC-decorated carbon nanotube yarns and their field-emission properties".(2010). |
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