Synthesis and Characterization of Novel Au(core)-Au/Pt Alloy(shell) Nanostructure

Autor:	Shu Fen Hu, Ru-Shi Liu, Hau Ming Chen
Rok vydání:	2004
Předmět:	Nanostructure Materials science Transmission electron microscopy Surface plasmon Alloy engineering Analytical chemistry Shell (structure) Nanoparticle engineering.material High-resolution transmission electron microscopy Bimetallic strip
Zdroj:	MRS Proceedings. 818
ISSN:	1946-4274 0272-9172
DOI:	10.1557/proc-818-m5.45.1
Popis:	A systematic study is reported about the amount-dependent morphology change in a series of Au-Pt bimetallic nanoparticles synthesized using chemical reduction. The amount of Au precursor is kept constant throughout whole series of compounds to obtain fixed Au core size (∼7.5 nm). The Au/Pt ratio is varied from 1/1 to 1/4 in order to synthesize Pt shell layer of different thickness. We observed a remarkable shift of surface plasmon band around 410 nm. With the aid of high resolution transmission electron microscope (HRTEM) and energy-dispersive spectrometer (EDS), the composition of shell layer is found to be Pt enriched Au-Pt alloy. As the amount of Pt increases, the Pt clusters formed a string-like shape on the surface of nanoparticles. The average diameter of these Pt clusters is about 2 nm. This special structure may exhibit unique catalytic property.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::de4879125a7b2ae7e6f970e28392c348 https://doi.org/10.1557/proc-818-m5.45.1 Zobrazit plný text záznamu Full text from SpringerLink