Abstract
Production of metal nanoparticles using fungi provides a safe and eco-friendly method superior to the traditional physical and chemical methods. Metal nanoparticles can be produced biosynthetically by intracellularly, extracellularly, or both. Extracellular biosynthesis is superior, as it is void of unnecessary adjoining cell components. A commonly used fungus Penicillium chrysogenum (the penicillin producer) has been reported previously to produce gold nanoparticles intracellularly. In the current work, P. chrysogenum was used to produce extracellular gold nanoparticles when gold chloride ion solution (HAuCl4?3H2O) was added to the fungal filtrate. These nanoparticles were characterized to determine the composition, shape, structure, and particle size.
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