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Relative cell viability after culturing with different concentrations of Au-SiNW nanohybrids varying from 0.000, 0.010, 0.025, 0.050, 0.075, 0.100, 0.250, to 0.500 mg/mL for 24 h at 37 °C. After the addition of MTT reagent and 4 h incubation at 37 °C, stop solution was added and followed by overnight incubation. The absorbance of each sample was recorded at 560 nm to determine the cell proliferation rate.
