Growth and electron field emission of ZnO nanorods on diamond films

Growth and electron field emission of ZnO nanorods on diamond films
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金刚石薄膜上 ZnO 纳米棒的生长和电子场发射

DOI:
10.1016/j.apsusc.2011.08.060
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发表时间:
2011-10
影响因子:
6.7
通讯作者:
Shaoheng Cheng
Shaoheng Cheng
中科院分区:
材料科学1区
文献类型:
--
作者:
D;an Sang;Hongdong Li;Shaoheng Cheng

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研究了用热气相输运法在化学气相沉积金刚石薄膜上生长氧化锌纳米棒。在初始生长状态下,半球形的ZnO核倾向于沉积在靠近梯田生长台阶和金刚石晶粒边界的地方。随着生长时间的延长,[0001]取向ZnO纳米棒出现,并进一步覆盖整个金刚石膜。研究发现,金刚石晶粒的大小决定了ZnO纳米棒的直径。与纯金刚石薄膜相比,ZnO纳米棒/金刚石体系的电子场发射性能得到了显著改善。生长在金刚石薄膜上的ZnO纳米棒的特性对进一步提高电子场发射性能起着重要的作用。
Zinc oxide (ZnO) nanorods grown on chemical vapor deposited diamond films by thermal vapor transport method have been investigated. In the initial growth status, the semi-spherical ZnO nuclei were preferably deposited near the growth steps on the terraces and the boundaries of diamond grains. With increasing the growth time, the [0001] orientated ZnO nanorods appeared and further covered the whole diamond film. It is found that the size of diamond grains would determine the diameter of ZnO nanorods. The electron field emission properties of the ZnO nanorods/diamond system have been significantly improved with respect to pure diamond film. The feature of the ZnO nanorods grown on diamond films played an important role in further enhancing the electron field emission performances.
DOI: 10.1021/nl0505804
发表时间: 2005-08-01
期刊: NANO LETTERS
影响因子: 10.8
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