Antimicrobial and antifungal activity of silver nanoparticlessynthesized from Rosmarinusofficinalis

Bio-inspired silver nanoparticles are rapidly synthesized at room temperature using Rosmarinus officinalisextract. A green and low cost synthesis is effective in the formation of stable crystalline silver nanoparticles in thesolution. Polyphenols which is present in the Rosmarinus officinalis extract function as reducing as well as stabilizingagent to produce shape controlled silver nanoparticles. Surface plasmon resonance confirmed the formation of silvernanoparticles in UV-Visible spectra at 450 nm. The Fourier transform infrared spectroscopy (FTIR) analysis wascarried out to identify and study the functional groups responsible for the bio-reduction of silver ion. High resolutiontransmission electron microscopy (SEM) and Transmission electron microscopy(TEM) images showed the sphericalcrystalline silver nanoparticles. The synthesized silver nanoparticles showed excellent antimicrobial and antifungalactivity.

Keywords:

silver nanoparticles , Rosmarinus officinalis , Green synthesis , Antibacterial , Antifungal