Characterization and Stability Study of Synthesized Gold and Silver Nanoparticles

Abstract

A basic initial characterization and stability study of synthesised gold and silver nanoparticles was carried out. Silver nanoparticles were synthesised by modified Creighton's method. Gold nanoparticles were synthesised by Turkevich method. The synthesised nanoparticles were subjected to characterization studies using DLS, UV-VIS spectrophotometer, pH meter, and the size characterization was studied using Mie plot and NNLs software. The objective of the study being to check the stability of the nanoparticles for three trials, and the samples analyzed showed good pH stability, with a variation of ± 1.0 throughout the study period, the samples being stored in refrigerator. An increase in particle size was observed as the study progressed, which may be due to aggregation and oxidation towards the end of the study.

Keywords: nanoparticles, characterization, stability, particle size