The concentrations Silver nanospheres Gold nanospheres Viability% Viability% Control 100 100 10 μg/ml 43 94.3 20 μg/ml 15.7 91.7 40 μg/ml 13.5 87.8

Table 1: The cell viability result of exposing raw macrophage cell line to three different concentrations of silver or gold nanospheres for fixed time (3 hrs).