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Confocal fluorescence images of CT-26 cells stained with calcein-AM/PI under various treatment groups such as control, control + NIR laser, GNR only, GNR@mSiO2 only, GNR@Ag@mSiO2 only, GNR@Ag@mSiO2-MB only, and GNR@Ag@mSiO2-MB + NIR laser (20× magnification; scale bar: 100 μm).
