The Size- and Chirality-Dependent Elastic Properties of Graphene Nanofilms

作者：Shao-Pei Wang, Jian-Gang Guo, Yan Jiang · 发表于：Journal of Computational and Theoretical Nanoscience · 年份：2013 · DOI：10.1166/jctn.2013.2687 · 被引用次数：16 · 研究领域：Graphene research and applications、Boron and Carbon Nanomaterials Research、Carbon Nanotubes in Composites

Tianjin Internal Combustion Engine Research Institute, Tianjin University, Tianjin 300072, ChinaElastic properties of monolayer and multilayer graphene nano“lms are investigated in the paperbased on structural mechanics approach. Via the linkage between the interatomic potential energyin molecular mechanics and the strain energy in classical structural mechanics, the models ofspace frame structures are developed to simulate the graphene crystals. By using “nite elementmethod, Youngs moduli and Poissons ratios of monolayer graphene nano“lms are calculated, andare proved to be size- and chirality-dependent. The values of Youngs moduli and Poissons ratiosshow an agreement with the experimental results in the literatures. In addition, Youngs moduliand Poissons ratios of multilayer graphene nano“lms are simulated to the cases with and withoutsurface relaxation taken into consideration, respectively. The results of calculation show that Youngsmodulus of multilayer graphene nano“lms is size-dependent, and surface relaxation has importantin”uence on it.