In order to explain the
discrepancy between the experiment and
simulations, Ruiz-Vargas with coworkers [19]
assumed the existence of nanovoids at real GBs in
polycrystalline graphene membranes. With this
assumption,molecular dynamics simulations were
performedwith focuses placed on strength exhibited
by graphene polycrystals containing nanovoids at
GBs.According to the simulations, the presence of
nanovoids at GBs leads to a dramatic decrease in
the strength characteristics of graphene bi-crystals
and make them consistent with the reported
experimental data [19].