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Fracture strength and Young's modulus of ZnO nanowires
Auteur(s)
Hoffmann, S.
Östlund, F.
Michler, J.
Fan H. J.
Zacharias, M.
Christiansen, S. H
Ballif, Christophe
Date de parution
2007
In
Nanotechnology, Institute of Physics (IOP), 2007/18/205503/1-5
Résumé
The fracture strength of ZnO nanowires vertically grown on sapphire substrates was measured in tensile and bending experiments. Nanowires with diameters between 60 and 310 nm and a typical length of 2 µm were manipulated with an atomic force microscopy tip mounted on a nanomanipulator inside a scanning electron microscope. The fracture strain of (7.7 ± 0.8)% measured in the bending test was found to be close to the theoretical limit of 10% and revealed a strength about twice as high as in the tensile test. From the tensile experiments, the Young's modulus could be measured to be within 30% of that of bulk ZnO, contrary to the lower values found in the literature.
Identifiants
Type de publication
journal article
