Abstract
In this study, gold and palladium nanoparticles (Au NPs and Pd NPs) were successfully synthesized by the iterative seeding of citrate and ascorbate, respectively. UV− visible spectroscopy results revealed that Au NPs exhibit plasmonic resonance peaks at 540−560 nm, while Pd NPs exhibit peaks at 220 nm. Transmission electron microscopy images revealed particle size distributions of 19.3 ± 4.2 nm and 31.9 ± 6.1 nm for Au NPs and Pd NPs, respectively. Larger sizes were observed for palladium nanoparticles because of their aggregation caused by the deficiency of the capping agent, while gold particles exhibited size stability. Furthermore, gold-palladium (AuPd) nanoflower particles were synthesized by the iterative citrate seeding of Pd on the Au NP surface.
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