Resumo

BOKE, E. et al. Nigella sativa seed-mediated green biosynthesis of silver nanoparticles and antimicrobial activity. Rev. mex. fis. [online]. 2024, vol.70, n.5, e051001.  Epub 07-Out-2025. ISSN 0035-001X.  https://doi.org/10.31349/revmexfis.70.051001.

This work introduces a systematic and efficient approach for producing stable AgNPs utilizing Nigella sativa (Ns) seed aqua extract (AE), which exhibit strong antibacterial properties. The characterization of Ns-AgNPs was performed using a UV-visible spectrophotometer (UV-Vis), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, scanning electronic microscopy (SEM), transmission electronic microscopy (TEM), and energy-dispersive X-ray spectroscopy (EDX). The Ns-AgNPs did not show aggregation, as shown by the results of STEM and XRD. According to the EDX analysis in this research, it was determined that Ns-AgNPs, gave signals in the silver region ($\sim$3 KeV) at 92.3%. Dynamic light scattering (DLS) was used to determine the average particle size and distribution profile of Ns-AgNPs. Ns-AgNPs showed significant antibacterial performance against Staphylococcus aureous and Escherichia coli, being effective at low concentrations. Ns-AgNPs may be incorporated into wound dressings, surgical instruments, and medical devices to prevent infections and promote healing.

Palavras-chave : Silver nanoparticles; nanotechnology; green synthesis; nigella sativa; antibacterial activity.

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