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

G. CORTHEY; JIMENA A. OLMOS-ASAR; GILBERTO CASILLAS; MARCELO M. MARISCAL; SERGIO J. MEJIA-ROSALES; J. AZCARATE; EDUARDO LARIOS; M. JOSÉ-YACAMÁN; R. SALVAREZZA; M. FONTICELLI

JOURNAL OF PHYSICAL CHEMISTRY C

AMER CHEMICAL SOC

Lugar: Washington; Año: 2014 vol. 118 p. 24641 - 24647

1932-7447

The 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.