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(a) Cell viability (MTT) assays using 10-nm GaHb-AgNPs against HaCaT cells, without and with exposure to 405-nm LED source (10 s, 1.4 J/cm2; N = 3). Controls include cells treated with 0.005% Triton X-100, and cells without GaHb-AgNPs (Ctrl–). (b) MTT assay using J774 macrophages, with 0- or 24-h delay between GaHb–AgNP treatment and light exposure. ** p < 0.05.
