Influence of Capping on the Atomistic Arrangement in Palladium Nanoparticles at Room Temperature

G. CORTHEY; J. A. OLMOS ASAR; G. CASILLAS; M. M. MARISCAL; S. MEJIA-ROSALES; J. C. AZCÁRATE; E. LARIOS; M. J. YACAMÁN; R. SALVAREZZA; M. FONTICELLI

AMER CHEMICAL SOC

Lugar: Washington; Año: 2014 vol. 118 p. 24641 - 24641

he role that protecting molecules have on the way that palladium atoms arrange themselves in nanoparticles prepared at room temperature was studied by the analysis of aberration-corrected scanning transmission electron microscopy images and atomistic Langevin dynamics simulations. It was found that the arrangement of Pd atoms is less ordered in thiolate-protected nanoparticles than in amine-protected ones. The experimental and theoretical data showed that the disorder in ∼3 nm thiolate-protected particles is promoted by the strong S−Pd bond in the sulfide layer that surrounds the nanoparticles