Figure 2From: Problems and challenges in the development and validation of human cell-based assays to determine nanoparticle-induced immunomodulatory effects TEM images and size distribution analysis of NPs exposed to different aqueous media. Upper panels: 13 nm Au NPs: A, as synthesized; B, after 48 h incubation at 37°C with DMEM + 10% FBS. Lower panels: 7 nm CoO NPs: C, as synthesized in dichlorobenzene; D, after 24 h at room temperature after phase transfer to water. Scale bars are 100 nm.Back to article page