The Influence of Precursor and Seminyak (Champeria sp.) Leaf Extract Concentrations in Microwave-Assisted Silver Nanoparticle Fabrication

Silver nanoparticles (AgNPs) possess remarkable characteristics, including high antibacterial efficacy, excellent thermal conductivity, and superior electrical conductivity. However, conventional methods employed for AgNPs synthesis still rely on the use of hazardous chemicals, which pose significant threats to the environment and human health. Recently, the synthesis of AgNPs using green and sustainable methods has gained considerable attention. In this study, concentration of AgNO3 (1; 10 and 100 mM) and Seminyak (Champeria sp.) leaf extract (1 and 2 wt%) were varied to know their influence on the fabrication of AgNPs through a microwave-assisted synthesis approach. The results demonstrated that the precursor and Seminyak leaf extract concentrations significantly influenced the AgNPs properties. Visual and UV-Vis spectroscopy results suggested that AgNPs might only form at 100 mM AgNO3, which is indicated by darker appearance of sample and the presence of broad peak at 400-500 nm. Based on transmission electron microscopy (TEM) results, increasing the Seminyak leaf extract concentrations exhibited enhanced stability and monodispersity of the nanoparticles with the average particle size of 26.8 ± 10.9 nm and 17.8 ± 7.6 nm for 1 and 2 wt%, respectively. The optimized precursor and Seminyak leaf extract concentrations can be utilized to tailor the size and morphology of AgNPs, making them suitable for various applications such as catalyst, electronics, and medicine.