Finite temperature effect on mechanical properties of graphene sheets with various grain boundaries
Ge Yong†, , Sun Hong-Xiang, Guan Yi-Jun, Zeng Gan-He
       

Plots of mean relative C–C bond length δL versus tilt angle in a range of θ ≤ 16.4° for samples with ZZ-GBs at different temperatures. Here, δL = L − L0, where L0 = 1.42 Å, and L is the mean length of the C–C bond shared by heptagon and hexagon rings in ZZ-GBs.