skip to main content

SciTech ConnectSciTech Connect

Title: Nanowire-density-dependent field emission of n-type 3C-SiC nanoarrays

The density of the nanowires is one of the key issues for their field emission (FE) properties of the nanoarrays, since it plays an important role on the electron emission sites and field screening effect. Here, we reported the nanowire-density-dependent FE properties of the n-type 3C-SiC nanoarrays. The highly oriented and large-scale SiC nanoarrays were grown on the 6H-SiC wafer via pyrolysis of polyureasilazane by adjusting the thicknesses of Au films used as the catalysts. The densities of the nanoarrays were tunable to be ∼2.9 × 10{sup 7}, ∼4.0 × 10{sup 7}, and ∼5.7 × 10{sup 7} nanowires/cm{sup 2} by controlling the Au film thicknesses of 50, 70, and 90 nm, respectively. The measured FE characteristics disclosed that the turn-on fields of the samples could be tailored to be of ∼1.79, 1.57, and 1.95 V/μm with the increase of the densities, suggesting that a suitable nanowire density could favor the enhanced electron emission from the SiC nanoarrays with improved emission sites and limited field screening effects.
Authors:
 [1] ;  [2] ; ; ;  [1] ;  [3]
  1. Institute of Materials, Ningbo University of Technology, Ningbo City 315016 (China)
  2. (China)
  3. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing City 100083 (China)
Publication Date:
OSTI Identifier:
22482124
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 12; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CATALYSTS; DENSITY; ELECTRON EMISSION; FIELD EMISSION; FILMS; NANOWIRES; PYROLYSIS; SILICON CARBIDES; THICKNESS