Liu, L., Sham, T. -K., Han, W., Zhi, C., & Bando, Y. (2011). X-ray Excited Optical Luminescence from Hexagonal Boron Nitride Nanotubes: Electronic Structures and the Role of Oxygen Impurities. ACS NANO, 5(1), 631-639. doi:10.1021/nn102881j
Liu, L., Sham, T. -K., Han, W., Zhi, C., & Bando, Y. (2011). X-ray Excited Optical Luminescence from Hexagonal Boron Nitride Nanotubes: Electronic Structures and the Role of Oxygen Impurities. ACS NANO, 5(1), 631-639. doi:10.1021/nn102881j