Synthesis of CdSe/ZnS and CdTe/ZnS Quantum Dots: Refined Digestive Ripening

Figure 7

(a)–(b) HRTEM image of CdSe QD obtained after 30 and 90 minutes of digestive ripening, (c-d) CdSe/ZnS Core-Shell QDs showing the crystalline lattice and (e) energy dispersion spectroscopy (EDX) spectrum of CdSe- ZnS core-shell QDs showing characteristic peaks of cadmium, selenide, zinc and sulfur. Copper is from the lacy-carbon-coated copper TEM grid.