Figure 1. Characterization of CdSe/ZnS quantum dots (QDs). (A) The morphologies of CdSe/ZnS QDs by transmission electron microscopy. (B) The emission spectrum scanning of CdSe/ZnS QDs. (C) The zeta potential analyses and dynamic light scattering plots of CdSe/ZnS QDs cultured in DMEM for 0 (D) and 24 h (E).