Fracture strength and Young's modulus of ZnO nanowires

Details Fracture strength and Young's modulus of ZnO nanowires Fracture strength and Young's modulus of ZnO nanowires

2006-11-15

arxiv.org/abs/cond-mat/0611409v1

Nanotechnology 18 (2007) 205503

Physics

Condensed Matter

Materials Science

5 pages, 3 figures, 1 table

Scientific paper

10.1088/0957-4484/18/20/205503

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 um 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 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 literature.

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