Optimizing PVP Concentration for Efficient Silver Nanowire Synthesis inElectrically Conductive Polymer Nanocomposites

The integration of conductive nanoparticles into polymer nanocomposites has significantly enhancedtheir electrical properties, with silver nanowires (AgNWs) being key due to their excellentconductivity and versatility. This study examines the impact of polyvinylpyrrolidone (PVP)concentration on AgNW synthesis to achieve uniform size, high aspect ratio, and high yield. Usingethylene glycol (EG) as a polyol, silver nitrate (AgNO۳) as a salt precursor, and PVP as a cappingagent, we synthesized AgNWs via the polyol method. PVP played a crucial role in promotinganisotropic growth by capping the lateral facets of multiply twinned particles. X-ray diffractionconfirmed the face-centered cubic (FCC) structure, with PVP selectively deactivating the (۱۰۰) facet,allowing growth in the (۱۱۰) direction. Varying PVP concentrations significantly affected AgNWmorphology, with optimal conditions yielding uniform nanowires free from byproducts. High PVPconcentrations led to microparticle formation, while low concentrations resulted in wide, short rods.The study highlights the importance of the PVP/AgNO۳ molar ratio in synthesis.

کلیدواژه ها:

Polymer Nanocomposite ، Silver Nanowire ، Electtrically Conductive Composites ، Synthesis ، Polyvinilpyrolidone.