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Graphene nanoribbon as an elastic damper
Iman Evazzade1, Ivan P Lobzenko2,3, Danial Saadatmand4
1Department of Physics, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran.
Nanotechnology
|March 1, 2018
Summary
Graphene nanoribbons exhibit two-phase stretching, splitting into domains with varying strain under tension. This behavior allows graphene nanoribbons to function as efficient elastic dampers, converting mechanical energy into heat.
Area of Science:
- Materials Science
- Nanotechnology
- Condensed Matter Physics
Background:
- Heterostructures of 2D nanomaterials offer unique properties.
- Two-phase stretching, where materials split into domains of different strain, is observed in polymers, DNA, and nanowires.
Purpose of the Study:
- To investigate the two-phase stretching phenomenon in graphene nanoribbons.
- To explore the potential applications of this phenomenon in graphene.
Main Methods:
- Molecular dynamics simulations were used to model graphene nanoribbons.
- Analysis of loading-unloading curves to understand energy dissipation.
Main Results:
- Graphene nanoribbons exhibit two-phase stretching, a novel behavior for graphene.
- The phenomenon involves unique nucleation and motion of domain walls.
- Loading-unloading curves show hysteresis due to energy dissipation during domain wall movement.
- Graphene nanoribbons can act as elastic dampers, converting strain energy to heat.
Conclusions:
- Graphene nanoribbons demonstrate tunable mechanical properties through two-phase stretching.
- This behavior opens possibilities for using graphene nanoribbons as elastic dampers.
- The fraction of strained domains can be controlled by elastic strain and heat.
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