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The in vitro cytotoxicities of different charged QDs against three cell lines.
Notes: RAW 264.7 macrophages (A), MDA-MB-231 breast cancer cells (B), and BT-20 breast cancer cells (C) were treated with different concentrations of QDs, respectively. After 24-hour incubation, the cell viability was measured by MTS assay.
Abbreviations: CA, carboxylic acid; PDDA, polydiallydimethylammounium chloride; PEG, polyethylene glycol; QDs, quantum dots.
