Fig. 1From: Toxicity of nano- and ionic silver to embryonic stem cells: a comparative toxicogenomic studyCharacterization of AgNPs. a Typical TEM images of AgNPs in water. b Typical TEM images of AgNPs in cell culture medium. The size bar at the bottom left corner of the images represents 20 nm. c Comparison of hydrodynamic size distribution of AgNPs in water and in cell culture medium. d Monitoring of AgNP stability by UV–vis spectra over 24 h incubation in cell culture mediumBack to article page