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Water-processed carbon nanotube/graphene hybrids with enhanced field emission properties

Authors :
Meng Song
Peng Xu
Yenan Song
Xu Wang
Zhenhua Li
Xuefu Shang
Huizhen Wu
Pei Zhao
Miao Wang
Source :
AIP Advances, Vol 5, Iss 9, Pp 097130-097130-6 (2015)
Publication Year :
2015
Publisher :
AIP Publishing LLC, 2015.

Abstract

Integrating carbon nanotubes (CNTs) and graphene into hybrid structures provides a novel approach to three dimensional (3D) materials with advantageous properties. Here we present a water-processing method to create integrated CNT/graphene hybrids and test their field emission properties. With an optimized mass ratio of CNTs to graphene, the hybrid shows a significantly enhanced field emission performance, such as turn-on electric field of 0.79 V/μm, threshold electric field of 1.05 V/μm, maximum current density of 0.1 mA/cm2, and field enhancement factor of ∼1.3 × 104. The optimized mass ratio for field emission emphasizes the importance of both CNTs and graphene in the hybrid. We also hypothesize a possible mechanism for this enhanced field emission performance from the CNT/graphene hybrid. During the solution treatment, graphene oxide behaves as surfactant sheets for CNTs to form a well dispersed solution, which leads to a better organized 3D structure with more conducting channels for electron transport.

Subjects

Subjects :
Physics
QC1-999

Details

Language :
English
ISSN :
21583226
Volume :
5
Issue :
9
Database :
Directory of Open Access Journals
Journal :
AIP Advances
Publication Type :
Academic Journal
Accession number :
edsdoj.6d7f0024080439a8b7cad3e06728d9b
Document Type :
article
Full Text :
https://doi.org/10.1063/1.4930966