Figure 4From: Beyond platinum: synthesis, characterization, and in vitro toxicity of Cu(II)-releasing polymer nanoparticles for potential use as a drug delivery vector In vitro toxicity of CuCNPs. (A) HeLa cell viability as measured via an assay based on MTT at 48 h showing toxicity only after the addition of Cu to the nanoparticles, (B) a similar experiment showing the reduced toxicity of CuCNPs upon reduction of Cu content.Back to article page