Uptake of transferrin conjugated quantum dots in single living cells

We study the uptake and distribution of transferrin (Tf)-conjugated CdSe/CdS/ZnS quantum dots (QDs) in single living HeLa cells with both fluorescence confocal microscopy and three-dimensional (3D) reconstruction technique. By increasing the co-incubation time or the dosage of QDs-Tf, we find that t