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The design of self-collapsed super-strong nanotube bundles |
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| Authors: | Nicola Maria Pugno |
| Affiliation: | a Laboratory of Bio-Inspired Nanomechanics “Giuseppe Maria Pugno”, Department of Structural Engineering and Geotechnics, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy b National Institute of Nuclear Physics, National Laboratories of Frascati, Via E. Fermi 40, 00044, Frascati, Italy c National Institute of Metrological Research, Strada delle Cacce 91, I-10135, Torino, Italy |
| Abstract: | The study reported in this paper suggests that the influence of the surrounding nanotubes in a bundle is nearly identical to that of a liquid having surface tension equal to the surface energy of the nanotubes. This surprising behaviour is supported by the calculation of the polygonization and especially of the self-collapse diameters, and related dog-bone configurations, of nanotubes in a bundle, in agreement with atomistic simulations and nanoscale experiments. Accordingly, we have evaluated the strength of the nanotube bundle, with or without collapsed nanotubes, assuming a sliding failure: the self-collapse can increase the strength up to a value of about ∼30%, suggesting the design of self-collapsed super-strong nanotube bundles.Other systems, such as peapods and fullerites, can be similarly treated, including the effect of the presence of a liquid, as reported in the appendices. |
| Keywords: | Self-collapse Nanotube Bundle Sliding Strength |
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