Enhanced field emission properties of a reduced graphene oxide/carbon nanotube hybrid film

Duc Dung Nguyen, Yi Ting Lai, Nyan Hwa Tai*

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

35 Scopus citations

Abstract

A facile vacuum filtration method for the preparation of hybrid films to achieve superior field emission properties from carbon nanotubes (CNTs) using reduced graphene oxide (rGO) as a bi-functional filler has been proposed. In the hybrid films, CNTs serve as electron emitters, while rGO helps to control the density of the CNT-emitters and reduce electrical resistance of the films. Via controlling volumes of CNTs and rGO dispersions, electron field emission properties of the hybrid films can be easily tailored. Higher weight ratio of rGO:CNT results in better electrical properties and the best field emission property is achieved when a rGO:CNT weight ratio of 1:3 is employed. The hybrid film reveals a significant improvement in field emission properties, as compared with the CNT film without adding rGO. Decreases in sheet resistance, turn-on field, and threshold field are attributed to the formation of extended conjugated network between CNTs and rGO in association with the reduction of screening effect through the optimization of density of CNT-emitters. The concept that rGO can be employed to control the density of CNT emitters will be of special interest for field emission enhancement.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalDiamond and Related Materials
Volume47
DOIs
StatePublished - 08 2014
Externally publishedYes

Keywords

  • Carbon nanotubes
  • Field emission
  • Reduced graphene oxide

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