6533b82dfe1ef96bd1290aec
RESEARCH PRODUCT
Limits of stability in supported graphene nanoribbons subject to bending
Topi KorhonenPekka Koskinensubject
Materials sciencestability limitsFOS: Physical sciencesNanotechnology02 engineering and technologyLimits of stability01 natural sciencesPotential energy landscapeMolecular dynamicsMesoscale and Nanoscale Physics (cond-mat.mes-hall)0103 physical sciencesElasticity (economics)010306 general physicsta114Condensed Matter - Mesoscale and Nanoscale PhysicsCondensed matter physicsmolecular dynamics simulationsBuckling instabilitybending021001 nanoscience & nanotechnologyZigzagPure bending0210 nano-technologyGraphene nanoribbonsgraphene nanoribbonsdescription
Graphene nanoribbons are prone to in-plane bending even when supported on flat substrates. However, the amount of bending that ribbons can stably withstand remains poorly known. Here, by using molecular dynamics simulations, we study the stability limits of 0.5-1.9 nm wide armchair and zigzag graphene nanoribbons subject to bending. We observe that the limits for maximum stable curvatures are below ~10 deg/nm, in case the bending is externally forced and the limit is caused by buckling instability. Furthermore, it turns out that the limits for maximum stable curvatures are also below ~10 deg/nm, in case the bending is not forced and the limit arises only from the corrugated potential energy landscape due to the substrate. Both of the stability limits lower rapidly when ribbons widen. These results agree with recent experiments and can be understood by means of transparent elasticity models.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-01-01 | Physical Review B |