Figure 2

(a) UV-Vis absorption and PL spectra of ZnCdSeS QDs dispersed in toluene. The inset shows the photo of QD solution irradiated by 365 UV light. (b) TEM image of ZnCdSeS QDs. The inset shows the HRTEM image of single ZnCdSeS QD. (c) TEM image of hybrid ZnO@TiO₂. (d) HRTEM image of ZnO NP.