LAUSR

Abstract The microwave-induced plasma in liquid process (MWPLP) has been attractive as a unique preparation method of metal nanoparticles. In this study, we investigated the effect of H 2 O 2 on gold nanoparticles prepared using the MWPLP. Au nanoparticles were obtained without aggregation when the Au and H 2 O 2 concentrations in the reaction solution were 0.3 mM and 0.03 mM, respectively. When the H 2 O 2 concentration was lower or higher than the optimum range, aggregated particles were obtained. The results show that the addition of H 2 O 2 had a great influence on the reduction rate and the dispersibility, and that Au nanoparticles prepared under optimum conditions were not aggregated and exhibited a high dispersibility.