Figure 7
SE and CL images of a single micro-cross structure with its corresponding spectra. (a) SE image of the Zn1−xCu x O micro-cross. (b) CL panchromatic image padded with the brightness distribution curve along the axial line of the sample. (c) Corresponding CL spectra at five different locations along the axial line of one branched nanorod. (d) CL ratio and Cu content variation with different positions of the branched nanorod.