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Cytotoxicity of Fe/CDs@PPSNs
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The in vitro cytotoxicity of Fe/CDs@PPSNs against SMMC-7721 cells and NIH-3T3 cells was performed by the MTT assay. In details, SMMC-7721 cells (5000 cells per well) and NIH-3T3 cells (5000 cells per well) were seeded in 96-well plates for 24 h. Then Fe/CDs@PPSNs with different particle concentrations (200, 400, 600, 800, and 1000 ppm) were added to each well and incubated for 24 h. Finally, the cytotoxicity was expressed as the percentage of cell viability as determined by the MTT assay.
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