Enhanced field emission from large scale uniform monolayer graphene supported by well-aligned ZnO nanowire arrays

被引：34
|
作者：
Yang, Zhicheng
Zhao, Qing [1 ]
Ou, Yongxi
Wang, Wei
Li, Heng
Yu, Dapeng
机构：
[1] Peking Univ, State Key Lab Mesoscop Phys, Sch Phys, Beijing 100871, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 17期
基金：
中国国家自然科学基金;
关键词：
SINGLE-LAYER GRAPHENE; ELECTRON-EMISSION; FILMS; SHEETS;
D O I：
10.1063/1.4763474
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Large scale, uniform single-layer graphene was transferred onto well-aligned ZnO nanowire arrays to produce high density nanoscale protrusions within graphene for efficient field emission. Polymethyl methacrylate (PMMA) was used as a supporting layer to provide a quasi-flat surface for graphene transfer. Highly efficient (maximum current density of similar to 500 mu A/cm(2)) and stable field emission with low turn-on fields (5.4 V/mu m) was observed due to highly localized electric field, which is much better than those without using PMMA. F-N plot showed an unique up-bending feature of single-layer graphene. Our approach provides an efficient way to produce high quality single-layer graphene field emitters. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4763474]
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页数：5
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