Production of few-layer MoS2 nanosheets through exfoliation of liquid N2–quenched bulk MoS2

Abstract

We demonstrate an efficient method for the production of few-layer MoS₂ nanosheets through exfoliation of bulk MoS₂ compounds that were subject to quenching in liquid N₂ and subsequent ultrasonication. This solution-based method, which involves a “quenching cracks” phenomenon, was performed open to the atmosphere. Subsequent ultrasonication of the exfoliated MoS₂ in solution provided us with MoS₂ nanosheets comprising two to four layers.