Field emission properties of cobalt/multiwalled carbon nanotube composite films fabricated by electrodeposition
Field emission properties of cobalt/multiwalled carbon nanotube composite films fabricated by electrodeposition
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DOI：
10.1016/j.apsusc.2013.05.117
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发表时间：
2013-09-01
影响因子：
6.7
通讯作者：
Miyagawa, Kazuaki
中科院分区：
文献类型：
--
作者：
Arai, Susumu;Miyagawa, Kazuaki
碳纳米管（CNT）作为场致发射材料具有广阔的应用前景。其中CNT通过金属附着到阴极的CNT场发射体是用于CNT场发射体的高度合适的结构。在这项研究中，钴/碳纳米管复合薄膜制备复合电镀作为场发射体。四种不同尺寸的多壁碳纳米管（MWCNTs）被用作CNT场发射体。研究了复合薄膜的微观结构、电导率和场发射性能。Co/MWCNT复合膜中相对较大的MWCNTs分布均匀，而较小的MWCNTs则倾向于在膜中形成聚集体。Co/MWCNT复合膜的电导率比纯钴膜的电导率低，具有明显的场发射特性。Co/MWCNT复合膜在10 nAcm（-2）的发射电流密度下具有1.6-1.9 V μ m（-1）的场发射电场。(C)2013爱思唯尔有限公司版权所有。
Carbon nanotubes (CNT) are promising for use as field emitters. CNT field emitters in which CNTs are attached to a cathode by a metal are highly suitable structures for CNT field emitters. In this study, Co/CNT composite films were fabricated by composite plating for use as field emitters. Four types of multiwalled CNTs (MWCNTs) with different sizes were used as CNT field emitters. The microstructures, electrical conductivity, and field emission properties of the composite films were evaluated. Co/MWCNT composite films were fabricated with homogeneous distributions of relatively large MWCNTs, whereas small MWCNTs tended to form aggregates in the films. The Co/MWCNT composite films, which had lower electrical conductivities than pure cobalt film, exhibited clear field emission. The Co/MWCNT composite films had field emission electric fields in the range of 1.6-1.9 V mu m(-1) at an emission current density of 10 nAcm(-2). (C) 2013 Elsevier B.V. All rights reserved.