A Novel Opto-mechanical method for Large-scale Production of Boron Nitride Nanosheets in Water

Hexagonal boron nitride (h-BN) is considered as most promising material for next generation microelectronic and other technologies. It can be easily integrated with other 2D materials such as graphene and molybdenum disulfide (MoS₂). The boron nitride nanosheet (BNNs) has lattice constant like that of graphene and a large electrical band gap. Also, it has an atomically smooth surface and large optical phonon modes. These qualities make it applicable as a substrate material for a high-performance graphene electronics and as an ideal nano filler in polymers for many application in polymer industry. To realize such applications at industrial level, the obvious task is to synthesize nanosheets in large scale. Here in we report synthesis of high quality BNNs in large quantities by a novel opto-mechanical method using water as a solvent, without adding any chemical or surfactants. The exfoliated BNNs have been extensively analysed for nanosheet area and thickness by SEM, AFM and Raman spectroscopy.

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