Electronic and optical properties of the H2O adsorbed the B-N-C nanotubes J. W. Wei, H. Zeng, L. C. Pu, J. W. Liang and P. Peng Eur. Phys. J. B, 81 1 (2011) 133-136 Published online: 13 April 2011 DOI: 10.1140/epjb/e2011-20010-9