Synthesis and UV?Visible spectroscopy study of core?shell gold?palladium nanoparticles by iterative seeding of citrate

2nd International Conference on Current Progress in Functional Materials 2017

Putra, M.B.S.^1 ; Saepudin, E.^1 ; Ivandini, T.A.^1

Department of Chemistry, Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Indonesia, Depok

16424, Indonesia^1

关键词: Capping agent;    Core shell;    Gold palladium nanoparticles;    Gold particles;    Palladium nanoparticles;    Plasmonic resonances;    Transmission electron microscopy images;    UV visible spectroscopy;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/496/1/012020/pdf
DOI  :  10.1088/1757-899X/496/1/012020

来源: IOP

【 摘 要 】

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.