Highly size-controlled synthesis of Au/Pd nanoparticles by inert-gas condensation

Gold/Palladium nanoparticles were fabricated by inert-gas condensation on a sputtering reactor. With this method, by controlling both the atmosphere on the condensation chamber and the magnetron power, it was possible to produce nanoparticles with a high degree of monodispersity in size. The structu...

Descripción completa

Detalles Bibliográficos
Autores principales: Pérez Tijerina, Eduardo, Gracia Pinilla, Miguel Ángel, Mejía Rosales, Sergio, Ortiz Méndez, Ubaldo, Torres, A., Yacamán, Miguel José
Formato: Artículo
Lenguaje:inglés
Publicado: The Royal Society of Chemistry 2008
Materias:
Acceso en línea:http://eprints.uanl.mx/8953/1/Highly%20size-controlled%20synthesis%20of%20Au_Pd.pdf
Descripción
Sumario:Gold/Palladium nanoparticles were fabricated by inert-gas condensation on a sputtering reactor. With this method, by controlling both the atmosphere on the condensation chamber and the magnetron power, it was possible to produce nanoparticles with a high degree of monodispersity in size. The structure and size of the Au/Pd nanoparticles were determined by mass spectroscopy, and confirmed by atomic force microscopy and electron transmission microscopy measurements. The chemical composition was analyzed by X-ray microanalysis. From these measurements we confirmed that with the sputtering technique we are able to produce particles of 1, 3, and 5 nm on size, depending on the choice of the synthesis conditions. From TEM measurements made both in the regular HREM, as well as in STEM-HAADF mode, we found that the particles are icosahedral in shape, and the micrographs show no evidence of a core-shell structure, in contrast to what is observed in the case of nanoparticles prepared by chemical synthesis.