ABSTRACT
Spatially resolved electron energy loss spectroscopy (EELS) is applied to characterize BCN nanotubes. First a quantitative procedure of elemental mapping with the help of associated calculations is presented to reveal stacking structure of graphitic carbon and BN layers along the radial direction of the nanotubes. Next the electronic structure identification, using the edge shapes, is achieved at the subnanometer level. Lastly the mapping of the π* weight ratio along the axial direction of the tube is the support for the investigation of the coaxial nanotube termination.
