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Theory of carbomorph cycles
Oleg E Shklyaev1, Eric Mockensturm1, Vincent H Crespi2
1Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802-6300, USA.
Physical Review Letters
|August 29, 2014
Summary
We introduce carbomorphs, reversible sp2-carbon systems controlled by energy competition. These systems, like carbon nanotubes, can transform between states, enabling applications as tunable springs or electromechanical devices.
Area of Science:
- Materials Science
- Nanotechnology
- Theoretical Physics
Background:
- Sp2-carbon based systems exhibit complex behaviors influenced by various energy factors.
- Understanding the interplay of strain, surface, and electrostatic energies is crucial for novel material design.
Purpose of the Study:
- To present a theoretical framework for reversibly deforming sp2-carbon systems, termed carbomorphs.
- To explore the potential applications of these carbomorphs in advanced mechanical and electromechanical systems.
Main Methods:
- Theoretical modeling of sp2-carbon systems.
- Analysis of competing strain, surface, and electrostatic energies.
- Investigation of bistable carbon nanotube transformations.
Main Results:
- A theory for carbomorphs, systems controlled by competing energies, is established.
- External forces can induce reversible state changes in carbon nanotubes (e.g., collapsed to inflated).
- Carbomorphs can function as voltage-controlled constant-force springs, charge-controlled harmonic springs, or electromechanical engines/generators.
Conclusions:
- Carbomorphs offer a novel pathway for designing responsive carbon-based materials.
- The tunable mechanical properties open avenues for micro/nano-scale devices and energy conversion systems.
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