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Title: Atomic-scale imaging correlation on the deformation and sensing mechanisms of SnO{sub 2} nanowires

We demonstrate direct evidence that the strain variation induced by local lattice distortion exists in the surface layers of SnO{sub 2} nanowires by coupled scanning transmission electron microscopy and digital image correlation techniques. First-principles calculations suggest that surface reduction and subsurface oxygen vacancies account for such vigorous wavelike strain. Our study revealed that the localized change of surface atomistic configuration was responsible for the observed reduction of elastic modulus and hardness of SnO{sub 2} nanowires, as well as the superior sensing properties of SnO{sub 2} nanowire network.
Authors:
 [1] ; ;  [2] ;  [3] ; ;  [4] ;  [1] ;  [5]
  1. Department of Mechanical Engineering, University of South Carolina, 300 Main Street, Columbia, South Carolina 29208 (United States)
  2. Department of Electrical Engineering, University of South Carolina, 301 Main Street, Columbia, South Carolina 29208 (United States)
  3. Electron Microscopy Center, University of South Carolina, 301 Main Street, Columbia, South Carolina 29205 (United States)
  4. Department of Mechanical Engineering and Materials Science, University of Pittsburgh, 3700 O'Hara Street, Pittsburgh, Pennsylvania 15261 (United States)
  5. (United States)
Publication Date:
OSTI Identifier:
22395548
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 24; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CORRELATIONS; CRYSTAL LATTICES; DEFORMATION; HARDNESS; IMAGES; LAYERS; NANOWIRES; OXYGEN; SCANNING ELECTRON MICROSCOPY; STRAINS; SURFACES; TIN OXIDES; TRANSMISSION ELECTRON MICROSCOPY; VACANCIES; VARIATIONS; YOUNG MODULUS