Structure and luminescence properties of 10-BN sheets.

Isotopic (10)BN sheets were first prepared using graphene sheets as templates to react with (10)B(2)O(3). The edge-areas of BN sheets have much higher oxygen-doping ratios compared to other areas. The emission peak of X-ray excited optical luminescence spectra of the (10)BN-sheets is broader and red-shifted because of the isotopic effect. A broad violet-blue emission at a wavelength centered at ∼400 nm is assigned to the defect emission due to oxygen-doping and defects in the BN network.