The Influence of Microwave Time on Green Synthesis of Silver Nanoparticles using Seminyak (Champeria sp.) Leaf Extract

The utilization of green synthesis methods for the production of silver nanoparticles (AgNPs) has gained attention due to their eco-friendly nature. However, it is important to acknowledge a limitation of green synthesis approaches, which often involves longer reaction times compared to conventional methods. In this context, microwave-assisted synthesis emerges as an effective strategy to address this challenge, thanks to its rapid and efficient heating. In this study, the influence of microwave time on the synthesis of AgNPs using Seminyak (Champeria sp.) leaf extract as a reducing and stabilizing agent was observed. The microwave time was systematically varied at intervals of 1, 3, and 5 minutes to evaluate its effects on the size and morphology of the resulting AgNPs. Based on UV Vis spectrophotometry results, a broader peak with the tendency for the peak to shift towards higher wavelengths was observed as the microwave irradiation time increased, indicating the increment of AgNPs particle size. The transmission electron microscopy (TEM) results confirmed previous results where extended microwave time led to a gradual augmentation of nanoparticle size from 26.8 ± 10.9 nm for 1 min to 35.6 ± 9.4 nm for 3 min, while 5 min microwave time produce the formation of agglomerated AgNPs.