Eu-doped Boron Nitride Nanotubes as a Nanometer-Sized Visible-Light Source Chen, H. ; Chen, Y. ; Li, C. P. ; Zhang, H. ; Williams, J. S. ; Liu, Y. ; Liu, Z. ; Ringer, S. P. Abstract Publication: Advanced Materials Pub Date: July 2007 DOI: 10.1002/adma.200700493 Bibcode: 2007AdM....19.1845C