Production of few-layer phosphorene by liquid exfoliation of black phosphorus

摘要

We report the liquid exfoliation of black phosphorus In N-methyl-2-pyrrolidone to form few-layer phosphorene nanosheets. Graphene is the archetypal two-dimensional material. Consisting of a single layer of covalently-bound sp~2-hybridised carbon atoms, it has the potential to revolutionise many technologies as well as creating new ones. Graphene exhibits exceptional electronic properties, carrier transport and mechanical properties but lacks a band gap, making it of limited use in electronic devices without significant strain-engineering or physical modification of morphology. Due to its intrinsic band gap, molybdenum disulfide (MoS_2) has been considered as a potentially promising semiconductor for use in optoelectronics and sensing applications despite its relatively low carrier mobility.