Figure 6

(a) SE image of the uncoated VS-grown ZnO nanorods with an average diameter of 100 nm. (b) Bottom: PL spectra of the uncoated (black) and Al-coated (red) VS-grown ZnO nanorods at 80 K. Top: Corresponding PL enhancement factor as a function of energy. Dashed green lines illustrate the DBX-related transitions in ZnO, while the dotted olive lines represent the FX-related emissions.