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Nanomechanics of Carbon Tubes: Instabilities beyond Linear Response

1996; American Physical Society; Volume: 76; Issue: 14 Linguagem: Inglês

10.1103/physrevlett.76.2511

1092-0145

Boris I. Yakobson, C. J. Brabec, J. Bernholc,

Force Microscopy Techniques and Applications

Carbon nanotubes subject to large deformations reversibly switch into different morphological patterns. Each shape change corresponds to an abrupt release of energy and a singularity in the stress-strain curve. These transformations, simulated using a realistic many-body potential, are explained by a continuum shell model. With properly chosen parameters, the model provides a remarkably accurate ``roadmap'' of nanotube behavior beyond Hooke's law.