Stability and Nature of Chemically Exfoliated MoS2 in Aqueous Suspensions.

We reveal that chemically exfoliated MoS2 nanosheets undergo lateral fracture and aggregation upon prolonged storage of the dispersion in ambient air, which was found to be associated with the reoxidation of the nanosheets. Such nanosheet degradation could be effectively prevented by storing the sample in an inert atmosphere to suppress the reoxidation process.