Fig. 2From: Rapidly liver-clearable rare-earth core–shell nanoprobe for dual-modal breast cancer imaging in the second near-infrared windowIn vitro toxicity of Nd-RENPs. a, b Cytotoxicity caused by Nd-RENPs in 4T1 (a) and MCF-7 (b) cell lines was analyzed by MTT after incubation for 24 h. c, d Hemolysis activity of Nd-RENPs was appraised by color observation (c) and spectrophotometry (d)Back to article page