Artículos de revistas
Highly size-controlled synthesis of Au/Pd nanoparticles by inert-gas condensation
Registro en:
Pérez Tijerina, Eduardo y Gracia Pinilla, Miguel Ángel y Mejía Rosales, Sergio y Ortiz Méndez, Ubaldo y Torres, A. y Yacamán, Miguel José (2008) Highly size-controlled synthesis of Au/Pd nanoparticles by inert-gas condensation. Faraday Discussions, 138. pp. 353-362. ISSN 1359-6640
Autor
Pérez Tijerina, Eduardo
Gracia Pinilla, Miguel Ángel
Mejía Rosales, Sergio
Ortiz Méndez, Ubaldo
Torres, A.
Yacamán, Miguel José
Institución
Resumen
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.