UV–Visible Spectroscopic Analysis Of Citrate-Capped Silver Nanoparticles
Year: 2024
Type: article
Abstract: Silver nanoparticles (AgNPs) have been widely studied due to their unique optical, physicochemical and plasmonic properties that are valuable for sensing, environmental monitoring, biomedicine and nanotechnology. In this work citrate-capped silver nanoparticles were synthesized by utilizing a citrate-mediated chemical reduction method and characterized using UV-Visible spectroscopy, which confirmed the optical properties and colloidal stability. The formation of silver nanoparticles was confirmed by the presence of a characteristic Surface Plasmon Resonance (SPR) absorption band in the visible region that was identified in the UV-Visible spectrum. The absorption spectrum was recorded in the range of 200 to 800 nm with a sharp and symmetrical SPR peak at 395 nm with a maximum absorbance of 0.685. The absence of significant peak broadening or secondary absorption bands further confirmed the strong stabilization by citrate ions and good colloidal stability of the synthesized nanoparticles. Trisodium citrate serves as both a reducing and a stabilizing (capping) agent to both form and maintain a stable suspension. The results of this study indicate that UV-Visible spectroscopy is a fast, reliable, non-destructive and inexpensive method to monitor nanoparticle synthesis and evaluate the optical properties of the nanoparticles. Citrate-mediated synthesis is a promising method for forming stable silver nanoparticles with desirable plasmonic properties which can be used in biosensing, environmental monitoring, analytical detection and other nanotechnology-based applications.
Source: Nanotechnology Perceptions
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W7203753591