STUDY ON SYNTHESIS AND ANTIBACTERIAL ACTIVITY OF SILVER NANOPARTICLE CONTAINING SOLUTION USING CHITOSAN AS REDUCING/ STABILIZING REAGENT

Abstract

Silver nanoparticles (AgNPs) were synthesized usingchitosan as reducing and stabilizing agent via a green and facile method. First, AgNO3was mixed with chitosan solution, then, the mixture was heated up to 85 – 95oC for a cerain period of time (2-48h), in which AgNPs were formed and homogeniously distributed/penetrated inside chitosan chains. AgNPs were characterized by XRD, IR, TEM and UV-vis methods. The obtained results confirmed that AgNPs, whose the particle size of about 7 - 12 nm, were coated by chitosan layer, therefore are stable for at least 4 months without any significant agglomeration. Antibacterial test of AgNPs were investigated, confirming their enhanced antibacterial activities  thanks to synergic properties of both AgNPs and chitosan.