Improved Sensitization of Zinc Oxide Nanorods by Cadmium Telluride Quantum Dots through Charge Induced Hydrophilic Surface Generation

Figure 3

Field emission scanning electron microscope (FESEM) images of CdTe QDs decorated on ZnO NRs showing a comparison of (a) bare air-annealed ZnO NRs; (b) CdTe QD decorated air-annealed ZnO NRs, and (c) CdTe QD decorated ultraviolet (UV) light annealed ZnO NRs; (d), (e), and (f) show close-up of the (a), (b), and (c) images while the insets in (d), (e), and (f) show top view of the same samples at different areas. UV-annealed defect engineered ZnO NRs show well distributed CdTe QDs along the cross section and tips of the NRs compared to annealed ZnO NRs.

(a)  

(b)

(c)

(d)

(e)

(f)