Figure 1
QD characterization. TEM micrographs of carboxyl-functionalize quantum dots (QD-COOH) (A) and amine-functionalized quantum dots (QD-NH2) (D). FESEM micrographs of QD-COOH (B) and QD-NH2 (E), including a high magnification FESEM image of QD-COOH (B: inset). The corresponding elemental mappings of QD-COOH (C) and QD-NH2 (F) were analyzed using energy dispersive X-ray (EDX) analysis at 20 keV (Cd, Cadmium; O, Oxygen; P, Phosphorous; S, Sulfur; Se, Selenium; Zn, Zinc).