LAUSR

Abstract This work aims to find a new green reducer agent for synthesis gold nanoparticles (AuNPs). Fresh fruiting bodies of shiitake mushroom (Lentinula edodes) were used to mycosynthesize AuNPs, which were characterized using change in color, UV–vis, FE-SEM, AFM, Zetasizer, Zeta Potential, XRD, EDX, and FTIR analyses. The purple color is a sign of biosynthesizing AuNPs. The UV–vis spectrum showed an absorption peak at 568 nm due to incitation of Surface Plasmon Resonance in AuNPs colloidal solution. FE-SEM images exhibited that most of the AuNPs have triangular, hexagonal, spherical and irregular shapes with an average of sizes reached 72 nm. The XRD pattern clearly explained that AuNPs formed in this work were crystalline. The EDX proved that the nanoparticles are AuNPs. FTIR exhibited the role of amino acids, polysaccharides and phenols as reducer agents. The value of zeta potential indicates good quality with the aggregation of particles.