Synthesis of self-assembled and hierarchical palladium-CNTs-reduced graphene oxide composites for enhanced field emission properties

被引：60
|
作者：
Kumar, Rajesh [1 ]
Singh, Rajesh K. [2 ]
Singh, Dinesh P. [3 ]
Vaz, Alfredo R. [1 ]
Yadav, Raja R. [4 ]
Rout, Chandra S. [5 ]
Moshkalev, Stanislav A. [1 ]
机构：
[1] Univ Campinas UNICAMP, Ctr Semicond Components & Nanotechnol CCS Nano, BR-13083870 Campinas, SP, Brazil
[2] Cent Univ Himachal Pradesh, Sch Phys & Mat Sci, Dharamshala 176215, HP, India
[3] Univ Santiago, Dept Phys, Estn Cent, Ave Ecuador 3493, Santiago, Chile
[4] Univ Allahabad, Dept Phys, Allahabad 211002, Uttar Pradesh, India
[5] Indian Inst Technol, Sch Basic Sci, Bhubaneswar 751013, Odisha, India
来源：
MATERIALS & DESIGN | 2017年 / 122卷
基金：
巴西圣保罗研究基金会;
关键词：
Reduced graphene oxide; Pd nanoparticles; Pd-CNTs-rGO composites; Microwave treatment; Field emission properties; CARBON NANOTUBES; ELECTRON-EMISSION; FACILE SYNTHESIS; LAYER; EFFICIENT; NANOCOMPOSITES; FABRICATION; IMPROVEMENT; GRAPHITE; SHEETS;
D O I：
10.1016/j.matdes.2017.02.089
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report the synthesis of palladium-graphene oxide based (Pd-rGO) composite and its enhanced electron field emission studies. The palladium nanoparticles decorated reduced graphene oxide (Pd-NPs-rGO) and Pd catalyst assisted grown CNTs on reduced graphene oxide (Pd-CNTs-rGO) composite have been synthesized employing microwave. The hierarchical Pd-CNTs-rGO composite shows enhanced field emission performance due to the synergestic effect of Pd catalyst assisted grown CNTs on rGO nanosheets (rGO-NSs) and its proper contact on rGO surfaces. The enhanced field emission behavior of Pd-CNTs-rGO composite is attributed to the easy electron tunneling from the one-dimensional CNTs, which increases the emission sites and hence the field emission current density. The Pd-CNTs-rGO composite exhibits lower turn-on field, lower threshold field, larger field enhancement factor and high emission current stability as compared to Pd-NPs-rGO composite. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：110 / 117
页数：8
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