Diameter-Dependent Radial and Tangential Elastic Moduli of ZnO Nanowires

We show how contact resonance atomic force microscopy (CR-AFM) can be used to accurately determine the radial elastic moduli of [0001] ZnO nanowires with diameters smaller than 150 nm. Using a realistic tip−nanowire contact geometry, we find the radial indentation modulus from CR-AFM data and the ta...

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Published in:Nano letters 2007-12, Vol.7 (12), p.3691-3697
Main Authors: Stan, G, Ciobanu, C. V, Parthangal, P. M, Cook, R. F
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Mechanical and acoustical properties of condensed matter
Mechanical properties of nanoscale materials
Nanocrystalline materials
Nanoscale materials and structures: fabrication and characterization
Physics
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cited_by cdi_FETCH-LOGICAL-a289t-d03ebbcfa4965daf61048ee0bb23e53a8bc6190305f99b39695ff54dbf2c01523
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description We show how contact resonance atomic force microscopy (CR-AFM) can be used to accurately determine the radial elastic moduli of [0001] ZnO nanowires with diameters smaller than 150 nm. Using a realistic tip−nanowire contact geometry, we find the radial indentation modulus from CR-AFM data and the tangential shear modulus from friction-type measurements. Both moduli show a pronounced increase when the wire diameter is reduced below 80 nm. The size dependence of the elastic properties can be explained by a core−shell model that accounts for a bulk-like core and an elastically stiffer surface layer.
doi_str_mv 10.1021/nl071986e
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source American Chemical Society:Jisc Collections:American Chemical Society Read & Publish Agreement 2022-2024 (Reading list)
subjects Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Mechanical and acoustical properties of condensed matter
Mechanical properties of nanoscale materials
Nanocrystalline materials
Nanoscale materials and structures: fabrication and characterization
Physics
title Diameter-Dependent Radial and Tangential Elastic Moduli of ZnO Nanowires
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