| AVS 65th International Symposium & Exhibition | |
| 2D Materials Focus Topic | Tuesday Sessions |
| Session 2D+EM+MI+NS-TuM |
| Session: | Properties of 2D Materials including Electronic, Magnetic, Mechanical, Optical, and Thermal Properties |
| Presenter: | Kyle Larsen, Brigham Young University |
| Authors: | K.G. Larsen, Brigham Young University S. Lehnardt, Brigham Young University J.T. Rowley, Brigham Young University B. Anderson, Brigham Young University R.R. Vanfleet, Brigham Young University R.C. Davis, Brigham Young University |
| Correspondent: | Click to Email |
Graphene, a monoatomic layer of carbon atoms, has a reported Young’s modulus of 1 TPa and a tensile strength of 130 GPa. These values make it both the strongest and one of the stiffest materials ever reported. The mechanical properties of multilayer graphene grown by chemical vapor deposition have been reported for films of up to 10 layers (3.35 nm). Films thicker than about 10 layers (sometimes considered graphite rather than multilayer graphene) are of interest as membranes and in MEMS applications. We have characterized CVD grown many-layer graphene films with thicknesses of about 50 nm by Raman spectroscopy, burst testing, and atomic force microscopy. The atomic force microscope was used to map the local compliance over suspended regions containing cantilevers cut out of the many-layer graphene with a focused ion beam. Analytical and finite element modeling were used in the analysis of the deflection of the many-layer graphene cantilevers to extract Young’s modulus. The many-layer graphene is high quality (little or no D peak in the Raman spectrum) and has a Young’s modulus in the range reported for graphene (0.5 TPa to 1 TPa).