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Pentagonal Nanorods and Nanoparticles with Mismatched Shell Layers

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Nano-scale rods and particles having the axes of fivefold symmetry, i.e., pentagonal nanorods and nanoparticles, are theoretically and experimentally investigated. Such objects possess elastic strains and mechanical stresses. In the present research a new mechanism of stress relaxation in nanorods and nanoparticles is considered. The mechanism is implemented by a formation of a surface layer with crystal lattice mismatch. The elastic fields and energies for nanorods and nanoparticles with the mismatched layers are calculated in the framework of the disclination model. The optimal mismatch parameter giving the maximal energy release is determined. The threshold radius as the minimal radius of nanorods or nanoparticles for which the formation of the layer is energetically favorable, is found. The threshold radius is approximately 10 nm for nanoparticle and 100 nm for nanorod of typical FCC metal.
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Keywords: DISCLINATION; ICOSAHEDRAL NANOPARTICLE; MISMATCH SHELL; PENTAGONAL NANOROD

Document Type: Research Article

Publication date: 2010-09-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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