The exposure of a mixture of 1 mM HAuCl4 and 1 mM AgNO3 solutions to different amounts of fungal biomass (Fusarium oxysporum) results in the formation of highly stable Au–Ag alloy nanoparticles with dimensions of 8–14 nm depending on metal molar fraction (see image). The amount of cofactor NADH released by the F. oxysporum fungus plays an important role in controlling the composition of the alloy nanoparticles.
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Senapati et al. (2005) studied this question.
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