TEM bright field image of the ZnO/CdO nanorod and the corresponding X-ray mapping. Cd Kα (red) and Zn Kα (blue) clearly show the formation of core/shell heterostructure. The peak labeled with asterisk is CuK peak originating from the TEM grid.
Lee et al. Nanoscale Research Letters 2012 7:626 doi:10.1186/1556-276X-7-626