Comparative fracture toughness of multilayer graphenes and boronitrenes

Xianlong Wei; Si Xiao; Faxin Li; Dai-Ming Tang; Qing Chen; Yoshio Bando; Dmitri Golberg

doi:10.1021/nl5042066

Comparative fracture toughness of multilayer graphenes and boronitrenes

Nano Lett. 2015 Jan 14;15(1):689-94. doi: 10.1021/nl5042066. Epub 2015 Jan 5.

Authors

Xianlong Wei¹, Si Xiao, Faxin Li, Dai-Ming Tang, Qing Chen, Yoshio Bando, Dmitri Golberg

Affiliation

¹ Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University , Beijing 100871, P. R. China.

PMID: 25555238
DOI: 10.1021/nl5042066

Abstract

We report the comparative in situ fracture toughness testing on single-edge V/U-notched multilayer graphenes and boronitrenes in a high-resolution transmission electron microscope (HRTEM). The nanostructures of notch tips and fracture edges of the tested specimens are unambiguously resolved using HRTEM. By analyzing the notch tip stresses using finite element method, the fracture toughness of multilayer graphenes and boronitrenes is determined to be 12.0 ± 3.9 and 5.5 ± 0.7 MPa√m, respectively, taking into account the notch tip blunting effects.

Keywords: Graphene; boronitrene; fracture toughness; transmission electron microscope; two-dimensional nanosheets.

Publication types

Research Support, Non-U.S. Gov't