Synthesis of Ag nanoparticles capped by thiol molecules

Abstract

The controlled size, Form and organisation of metal nanocrystals is significant because of strong relationship between these components with electrical photocatalytic and optical properties. Among the metal nanocrystals nobles’ metal is that the most generally utilized in the technology trade during a types of application like medical drug, antiviral antifungal, anticancer and catalytical biosensing. Herein we report the an environmental-friendly and facile approach was developed to synthesize Ag nanoparticles (Ag NPs) by chemical precipitation route using thioglycolic acid (TGA) as capping molecules with NaBH4 as reducing agent. The particles size is manipulated by attention of the precursor and capping molecules. The optical absorption and photoluminescence measurement shows the clear presence of surface plasmon resonance (SPR) with small size Ag nanoparticles. The X-ray powder diffraction (XRD) measurements shows the face centred cubic (fcc) phase. The calculated particle size is 18.00 nm in size. The estimated size from TEM measurement is 20.0 nm. The present method of synthesis of silver nanoparticles is low cost and useful in biological imaging and biosensing applications.