Differently environment stable bio-silver nanoparticles: study on their optical enhancing and antibacterial...

Area of Science:

• Green Chemistry
• Nanotechnology
• Materials Science

Background:

• Limited research exists on the stability and applications of green-synthesized silver nanoparticles (Ag NPs).
• Plant-derived materials offer sustainable routes for nanoparticle synthesis.

Purpose of the Study:

• To synthesize stable Ag NPs using Neem leaf extract and apple pectin biopolymer.
• To investigate the stability, SERS activity, and antibacterial properties of these green-synthesized Ag NPs.

Main Methods:

• Synthesis of Ag NPs using Neem (Azadirachta indica) leaf extract and apple pectin.
• Characterization using various instrumentation techniques (SEM, HRTEM).
• Evaluation of colloidal stability, SERS activity, and antibacterial efficacy against Escherichia coli.

Main Results:

• Well-defined, spherical Ag NPs (14-27 nm) were synthesized, capped with biomaterials.
• High colloidal stability was observed in various solutions (water, electrolytes, BSA, different pH) for 120 hours.
• Ag NPs demonstrated SERS activity and significant antibacterial effects against E. coli, with observed cellular membrane damage.

Conclusions:

• Environmentally friendly Ag NPs synthesized using plant materials exhibit excellent stability.
• These bio-Ag NPs are effective as antimicrobial agents and show potential for SERS-based analytical applications.