Experimental, finite element, and density-functional theory studyof inorganic nanotube compression

Interactions between the walls in multiwalled nanotubes are key to determining their mechanical properties. Here, we report studies of radial deformation of multiwalled WS 2 nanotubes in an atomic force microscope. The experimental results were fitted to a finite element model to determine the radia...

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Bibliographic Details
Published in:Applied physics letters 2011-02, Vol.98 (8), p.081908-081908-3
Main Authors: Kalfon-Cohen, Estelle, Goldbart, Ohad, Schreiber, Roy, Cohen, Sidney R., Barlam, David, Lorenz, Tommy, Joswig, Jan-Ole, Seifert, Gotthard
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Summary:Interactions between the walls in multiwalled nanotubes are key to determining their mechanical properties. Here, we report studies of radial deformation of multiwalled WS 2 nanotubes in an atomic force microscope. The experimental results were fitted to a finite element model to determine the radial modulus. These results are compared with density-functional tight-binding calculations of a double-walled tube. Good agreement was obtained between experiment and calculations. The results indicate the importance of the sliding between layers in moderating the radial modulus. A plateau in the deformation curves is seen to have atomistic origins.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3556679