Background: The feasibility of plant extracts for metallic nanoparticle fabrication has
been demonstrated. Each plant species impacts differently on formed nanoparticles, thus specific
plants need to be explored in detail.
Objective: Continuing the fabrication of nanoparticles using green method, Garcinia mangostana
shell and Tradescantia spathacea leaf extract are exploited as reducing sources to form two types of
silver nanoparticles (GMS-AgNPs and TSL-AgNPs) less than 50 nm.
Methods: Structural characterization of GMS-AgNPs and TSL-AgNPs was performed by ultravioletvisible
spectrophotometry (UV-vis), Fourier transform infrared spectroscopy (FTIR), X-ray energy
dispersive spectrometer (EDAX), scanning electron microscopy (SEM) and transmission electron
microscopy (TEM). Antifungal tests of GMS-AgNPs and TSL-AgNPs were performed with Aspergillus
niger, Aspergillus flavus, and Fusarium oxysporum.
Results: UV-vis spectra with the 440-nm peak demonstrate the silver nanoparticle formation. FTIR
analysis shows the GMS-AgNPs and TSL-AgNPs modified by organic functional groups. The SEM
and TEM images indicate that the GMS-AgNPs are spherical shaped with rough edged, while the
TSL-AgNPs are spherical shape with smooth surface. The GMS-AgNP average size (15.8 nm) is
smaller than TSL-AgNP (22.4 nm). In addition, antifungal tests using Aspergillus niger, Aspergillus
flavus, and Fusarium oxysporum reveal that GMS-AgNPs and TSL-AgNPs can significantly inhibit
the proliferation of these fungal strains.
Conclusion: Garcinia mangostana shell and Tradescantia spathacea leaf extract as renewable and
eco-friendly resources playing a dual role for nanoparticle biosynthesis create GMS-AgNPs and
TSL-AgNPs with high antifungal efficiency for biomedical or agricultural applications.