Figure 5.

Confocal microscopic visualization of Human embryonal kidney cell line 293T cells treated with PAA-capped green-emitting CdSe/CdS QDs (λem max = 559 nm, about 3 nm in size) with the concentration of 5 μg/mL for 4 h at 37°C. From left to right, the panels show the transmission image, luminescence image, and an overlay of the two.

Zhai et al. Nanoscale Res Lett 2011 6:31   doi:10.1007/s11671-010-9774-z