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Open Access Nano Express

Mechanical characterization of nanoindented graphene via molecular dynamics simulations

Te-Hua Fang1*, Tong Hong Wang2, Jhih-Chin Yang3 and Yu-Jen Hsiao4

Author affiliations

1 Department of Mechanical Engineering, National Kaohsiung University of Applied Sciences, 415 Chien Kung Rd., Kaohsiung 807, Taiwan

2 Central Product Solutions, Advanced Semiconductor Engineering, Inc., Kaohsiung 811, Taiwan

3 Institute of Mechanical and Electromechanical Engineering, National Formosa University, Yunlin 632, Taiwan

4 National Nano Device Laboratories, Tainan 741, Taiwan

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Citation and License

Nanoscale Research Letters 2011, 6:481  doi:10.1186/1556-276X-6-481

Published: 3 August 2011

Abstract

The mechanical behavior of graphene under various indentation depths, velocities, and temperatures is studied using molecular dynamics analysis. The results show that the load, elastic and plastic energies, and relaxation force increased with increasing indentation depth and velocity. Nanoindentation induced pile ups and corrugations of the graphene. Resistance to deformation decreased at higher temperature. Strong adhesion caused topological defects and vacancies during the unloading process.

Keywords:
molecular dynamics; nanoindentation; graphene; mechanical properties