A facile synthesis and field emission property investigation of Co3O4 nanoparticles decorated graphene

被引：16
|
作者：
Baby, Tessy Theres [1 ]
Sundara, Ramaprabhu [1 ]
机构：
[1] Indian Inst Technol, Dept Phys, Alternat Energy & Nanotechnol Lab, Nano Funct Mat Technol Ctr, Madras 600036, Tamil Nadu, India
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2012年 / 135卷 / 2-3期
关键词：
Graphene; Cobalt oxide; Field emission; Turn-on field; LITHIUM-ION BATTERIES; HOLLOW SPHERES; ELECTRODEPOSITION; CAPACITY; FILMS;
D O I：
10.1016/j.matchemphys.2012.05.035
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The present work describes the synthesis of cobalt oxide nanoparticle decorated hydrogen exfoliated graphene (Co3O4/HEG) by exfoliating graphite oxide in hydrogen atmosphere followed by chemical reduction of cobalt salt using sodium borohydride. The synthesized material has been characterized by X-ray diffractometry, thermogravimetric analysis, field emission scanning electron microscopy and transmission electron microscopy. A flexible field emitter has been fabricated by spin coating this material on carbon cloth. Electron emission characteristics of Co3O4/HEG have been investigated using an in-house fabricated setup and analyzed using Fowler-Nordheim equation. Turn-on and threshold fields of 1.12 and 1.35 V mu m(-1), respectively have been observed for this material. Moreover, the present field emitter shows a reasonably good stability and repeatability. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：623 / 627
页数：5
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