Quantitative In Situ Tensile Testing of Suspended Graphene
Peng Zhang (), Cheng Peng (), Phillip Loya (), Zheng Liu (), Lulu Ma (Rice University), Yongji Gong (Rice University), Jiangnan Zhang (), Pulickel Ajayan (), Jun Lou (Rice University)
Synthesis, Characterization, and Modeling of Low-Dimensional Nanomaterials
Tue 2:40 - 4:00
Salomon 202
Graphene has shown great potential in thermal, electrical and mechanical applications, so deeper understanding on its mechanical behaviors is of great significance. Quantitative in situ tensile testing of suspended graphene synthesized by chemical vapor deposition (CVD) was carried out using a combination of a quantitative in-SEM nanoindenter and a micromechanical device. The tested graphene samples generally failed in a brittle manner with a much lower breaking stress than the theoretical value, demonstrating a linear stress-strain curve. Inspired by this observation, pre-cracks with varying sizes were introduced to different samples and a good agreement with the Griffith theory was found in this two-dimensional brittle material.