From mesoscale to nanoscale mechanics in single-wall carbon nanotubes

Torres-Dias AC, Cerqueira TFT, Cui W, Marques MAL, Botti S, Machon D, Hartmann MA, Sun Y, Dunstan DJ, San-Miguel A (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Carbon Elsevier

Book Volume: 123

Pages Range: 145-150

DOI: 10.1016/j.carbon.2017.07.036

Abstract

The analysis of the radial collapse of individualized and isolated single-wall carbon nanotubes under high pressure as function of their diameter, d, distinguishes their mesoscale and their nanoscale mechanics. The evolution with pressure of the Raman spectra for nine tube chiralities and the theoretical modelling reveal a deviation from the continuum mechanics prediction of a collapse pressure PC∝d−3. Nanotubes show a normalized collapse pressure PN=PCd3=24αD(1−β2/d2) both in experiment and in very different theoretical models. In this expression β=0.44±0.04nm represents the smallest diameter for a stable freestanding single-wall carbon nanotube and D is the bending stiffness of graphene. From the experimental data D=1.7±0.2eV. Deviations from the continuum mechanics predictions start to be of significance for diameters smaller than ∼1nm. The associated reduction of their collapse pressure is attributed to the discretization of the elastic compliances around the circumference of the tubes.

Involved external institutions

Université Claude Bernard Lyon 1 (UCB) FR France (FR) Universität Wien / University of Vienna AT Austria (AT) Queen Mary University of London GB United Kingdom (GB)

How to cite

APA:

Torres-Dias, A.C., Cerqueira, T.F.T., Cui, W., Marques, M.A.L., Botti, S., Machon, D.,... San-Miguel, A. (2017). From mesoscale to nanoscale mechanics in single-wall carbon nanotubes. Carbon, 123, 145-150. https://doi.org/10.1016/j.carbon.2017.07.036

MLA:

Torres-Dias, Abraao C., et al. "From mesoscale to nanoscale mechanics in single-wall carbon nanotubes." Carbon 123 (2017): 145-150.

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