Volume 132, Number 3, November 2020
|Number of page(s)||7|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||21 December 2020|
Twisting of graphene nanoribbons partially located on flat substrates
1 N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences (FRCCP RAS) Moscow, 119991, Russia
2 Plekhanov Russian University of Economics - Moscow, 117997, Russia
Received: 14 August 2020
Accepted: 9 October 2020
The molecular dynamics simulation of longitudinal twisting of graphene nanoribbons hanging from the edge of a flat substrate formed by the surface of a hexagonal boron nitride crystal has been performed. It has been shown that rotation of the free end of a nanoribbon causes twisting of the suspended region accompanied by monotonous sliding of the nanoribbon over the substrate. At the beginning, a regular screw-like shape is formed in the suspended section, next a super-twisted section emerges inside it, further growth of which occurs due to pulling of the nanoribbon from the substrate. After separation from the substrate, the twisted nanoribbon folds into a roll, so that further twisting results only in free rotation of the roll.
PACS: 62.25.-g – Mechanical properties of nanoscale systems / 68.65.Pq – Graphene films
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