Figure 4
From: Fracture Mechanism and Toughness Optimization of Macroscopic Thick Graphene Oxide Film
(a) A selected stress-strain curve of the 13.8-μm-thick C-GOF, demonstrating the fracture mechanism of the thick C-GOFs. SEM images of (b) the ruptured skins and (c,d) irregular fracture sections of the stretched GOFs. (e) Loading-unloading cycling and (f) relaxation test of the 13.8-μm-thick C-GOF within 7.5% strain.
