Spectral Investigation of Surface Plasmon Resonance Bands of Silver Nanoparticles Capped with Gallic Acid

Abstract

The study of silver nanoparticles fabricated more and more for textile industry, cosmetics, pharmaceutics and other utilizations has led to the diversification of synthesis protocols. First we present single pot reaction of silver nitrate with gallic acid, rather newly used as reducer, with focus on the influence of reaction parameters on the Surface Resonance Plasmon bands of resulted silver nanoparticles. Four experimental variants of chemical reduction were conducted at room and at 60 °C, at 7.5 pH and at 10.5 pH. Secondly, two phase photochemical reduction with gallic acid using UV exposure was carried out. The Surface Plasmon Resonance spectral band of silver nanoparticle suspensions was rather broad indicating dimensional polydispersion, while symmetrical shape and maximum position suggested dominant spherical nanosized particles.