Green synthesis of multi-shaped silver nanoparticles: optical, morphological and antibacterial properties

The manuscript deals with the green synthesis of anisotropic silver nanoparticles (AgNPs). For synthesis, the maltose has been used as reducing and polyvinyl pyrrolidone (PVP) as capping agent and the reaction has been initiated using microwave heating. A strong SPR band at 427 nm and a tail around 590 nm in UV–Vis spectrum of AgNPs, and TEM imaging confirmed the synthesis of anisotropic nanoparticles (NPs). Microwave irradiation time, silver precursor concentration and capping agent concentration affected the particle size as well as particle size distribution. Antibacterial behaviour of anisotropic AgNPs was better than their spherical counterparts.