Fig. 6
From: Quantum dots as targeted doxorubicin drug delivery nanosystems in human lung cancer cells
Representative microscopic images of A549 cells from colony forming efficiency assay. Solvent control and control images present the fully developed colonies with ≥ 50 cells. Images from QD-treated cells present colonies of 2–10 cells or single cells. Images were obtained under a stereoscopic microscope (Opti-Tech Scientific) at a magnification of × 2. QD Ag–In–Zn–S nanocrystals modified with: 11-mercaptoundecanoic acid (MUA), Cys L-cysteine, LA lipoic acid, FA folic acid, DOX doxorubicin