Most materials will break when a force is applied to an imperfection in their structure — such as a notch or dislocation. The behavior of these imperfections, and the resulting breakage, differ markedly between small structures, such as nanowires, and larger, bulk materials.
Examples of failure in four different lengths of nanowire as a result of tensile stress. Only nanowire sections close to the fracture are shown. A short (188 nanometer (nm)) nanowire fails through gradual, ductile deformation (top). A long (1,503 nm) nanowire fails abruptly through a brittle or localized shear failure (bottom).
© 2012 American Chemical Society
Wu, Z., Zhang, Y.-W., Jhon, M. H., Gao, H. & Srolovitz, D. J. Nanowire failure: long = brittle and short = ductile. Nano Letters 12, 910–914 (2012).
Further reports about: > A*STAR > High Performance Computing > Mechanical failure of short nanowires > Performance Measurement-Systems > Pervasive Computing > bulk material > crystal structure > face-centered cubic crystal structure > metal nanowires > nanowire > numerical simulation > small structures
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