Bactericidal and cytotoxic properties of green synthesized nanosilver using Rosmarinus officinalis leaves

• Main Authors: Daghestani Maha, Al Rashed Sarah A., Bukhari Wadha, Al-Ojayan Badryah, Ibrahim Eiman M., Al-Qahtani Asma M., Merghani Nada M., Ramadan Rasha, Bhat Ramesa Shafi
• Format: Article
• Language: English
• Published: De Gruyter 2020-05-01
• Series: Green Processing and Synthesis
• Subjects: rosmarinus officinalis; green synthesis; nanosilver
• Online Access: https://doi.org/10.1515/gps-2020-0025
• ISSN: 2191-9542; 2191-9550

Green synthesized nanoparticles from plant extracts are being used in various biomedical applications, particularly because of their bactericidal and cytotoxic activities. In this study, silver nanoparticles (AgNPs) were successfully synthesized from the Rosmarinus officinalis aqueous leaf extract. Different spectroscopic and microscopic analyses such as ultraviolet-visible (UV-vis) spectroscopy, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy, and energy-dispersive X-ray spectroscopy were performed to verify the biosynthesized AgNPs in our sample. The formation of nanosilver particles was preliminarily confirmed by UV-vis spectroscopy at 400 nm. The presence of carboxylic or amide groups was confirmed by FTIR, for the reduction of the silver ion. Transmission electron microscopy confirmed a particle size of 12–22 nm. The prepared AgNPs showed good antibacterial activity against human pathogens and good cytotoxic activity against the human breast cancer cell line (MDA MB 231). The nanoparticles prepared from R. officinalis can be used for various biomedical applications.