Abstract
Green synthesis of platinum nanoparticles (PtNPs) using Prunus × yedoensis tree gum extract was studied. Color changes, ultraviolet–visible spectra (277nm), X-ray diffraction peaks (2θ=38.17, 45.54, and 68.12), and Fourier transform infrared spectroscopy confirmed the presence of PtNPs. Transmission electron microscopy shows that PtNPs are mostly spherical and oval in shape, with an average particle size of 10–50nm. Chemical constituents present in the gum extract may be responsible for the reduction of Pt ion. Among the five phytopathogens tested, the two pathogens Colletotrichum acutatum and Cladosporium fulvum show 15mm and 18mm zones of inhibition against synthesized PtNPs at 4 and 8μg/well, respectively.
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