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Possible equilibrium states of multilayered carbon nanoribbons are found using the
chain model moving on a plane previously proposed by the authors. For very short nanoribbons
only flat multilayered structures are possible, while for sufficiently long nanoribbons the lowes
energy have nanoscrolls with folded structures having intermediate value of energy.
Dependencies of the internal and external radii of the scrolls, as well as the number of coils on
the nanoribbon length are calculated. It is found that the radial thermal espansion coefficient of
nanoscrolls is two or even three orders of magnitude larger than the linear thermal expansion
coefficient of diamond. Thus, carbon nanoscrolls can be used to make very sensitive
temperature sensors.
Keywords: graphene; chain model; scrolls; thermal expansion. |
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