Synthesis of gold Nanoparticles: Influence of reducing agent on optical properties

Document Type : Research Article

Author

Faculty of Physics, Alzahra University, Tehran, Iran

10.22034/amnc.2023.414791.1253

Abstract

Recently, plasmonic nanoparticles with unique optical properties have been used in nanomedicine ranging from optical biosensing to bioimaging to drug delivery. Meanwhile, gold nanoparticles with very small and uniform size are desirable for these applications due to their low toxicity. In this project, reduction of gold by sodium borohydride (NaBH4) led to preparation of metal nanoparticles anchored gelatin matrix successfully. Due to its high biocompatibility, gelatin is very suitable as a stabilizing agent and despite other organic capping agents, it reduces the toxicity of these Au nanoparticles (Au Nps). These nanomaterials have been studied using Fourier transformed infrared (FT-IR), Optical Absorption, Photoluminescence (PL) spectroscopy techniques, using transmission electron microscope (TEM) and X ray diffraction (XRD). And influence of different concentrations of reducing agent have been investigated in preparation and optical properties of Au Nanoparticles with Gelatin as a capping agent. These nanomaterials are very promising for making devices with high luminosity in nano dimensions. In addition, since non -toxic and solvent materials are used in synthesis, the integration of these particles into a variety of systems, especially those related to biological and biomedical applications, can be practical and useful.

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