Optimization of Surface Plasmon Resonance Band of Copper Nanoparticles Doping in Silica Xerogels

Abstract

Copper nanoparticles were synthesized via chemical reduction method. Copper nitrate aqueous precursor using trisodium citrate as a reducing agent at boiling temperature. Structural and optical characteristics were determined as a function of copper nitrite concentration. The effect of concentration on the characteristics of the surface plasmon absorption band was determined and studied at 790 nm. The broadening of the surface plasmon resonance (SPR) band indicated the existence of larger particles in the solution. Silica xerogel doped with Copper nanoparticles by sol-gel route at specific preparation parameters. The absorption intensity reasonably increased for bulk samples (Cu NPs in xerogels) as compared to Cu NPs solution.