Abstract

Cyclic microbridge tests were applied to investigate the mechanical properties of the 100-to-400-nm-thick graphene oxide membranes. The effective Young’s moduli of different thickness graphene oxide membranes were derived and proved to be size dependent. The self-reinforcing behavior of graphene oxide membranes, which exhibits as an increase in Young’s modulus after cyclic loading, was observed and turned out to be in a relationship with thickness. A theoretical analysis is presented to explain the size dependence of the self-reinforcing Young’s moduli. This work is meaningful for the applications of graphene oxide membranes and the development of basic elements of the micro/nano-electro-mechanical systems.

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