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

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/cm{sup 2}, and field enhancement factor of ∼1.3 × 10{sup 4}. 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.
Authors:
; ; ; ;  [1] ; ; ;  [2] ;  [3]
  1. Department of Physics, Zhejiang University, Hangzhou 310027 (China)
  2. Institute of Applied Mechanics, Zhejiang University, Hangzhou 310027 (China)
  3. Department of Physics, Faculty of Science, Jiangsu University, Zhenjiang 212013 (China)
Publication Date:
OSTI Identifier:
22492349
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 9; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE; CARBON NANOTUBES; CARBON OXIDES; CURRENT DENSITY; ELECTRIC FIELDS; ELECTRONS; FIELD EMISSION; GRAPHENE; INTERFACES; WATER