Attached live and dead Caco-2 cells after 24 hr incubation with (A) 0.84 nmol/ml, (B) 4.2 nmol/ml, (C) 21 nmol/ml and (D) 105 nmol/ml EviTag™ T1 CdSe QDs. The live cells are stained with calcein AM, a green dye. The dead cells are stained with EthD-1, a red dye. The scale bar is 500 μm.
Wang et al. Journal of Nanobiotechnology 2008 6:11 doi:10.1186/1477-3155-6-11