Suzhou Nutpool Materials Technology Co., Ltd

Three two-dimensional (2D) single layer boron nitride sheets have been predicted based on the first-principles calculations. These 2D boron nitride sheets are comprised of equivalent boron atoms and nitride atoms with sp 2 and sp bond hybridization. The geometry optimization reflects that they all possess stable planar crystal structures with the space group P 6 04 2 m mathContainer Loading Mathjax ( D 3 h 3 mathContainer Loading Mathjax ) symmetry. The charge density distribution manifests that the B–N bonds in these boron nitride sheets are covalent in nature but with ionic characteristics. The tunable band gaps indicate their potential applications in nanoscale electronic and optoelectronic devices by changing the length of sp-bonded B N linkages.