Deposition of Pd nanoparticles on ultrathin Al<inf>2</inf>O<inf>3</inf> films

Abstract

It is widely accepted that self-assembling nanostructure of metals with well-defined spatial order is one of the promising ways for engineering new materials. Recent years revealed substantial progress in fabricating metal nanoparticles on ultrathin oxide films due to their ordered surface. In this work, we present the results on the adsorption of Pd nanoparticles on the ultrathin Al 2 O 3 films prepared on the Ni 3 Al(111) substrate. The thermal stability of the Pd nanoparticles has been studied. The results showed that the Pd nanoparticles with size of about 4 nm are stable at 580 K, but aggregation of the Pd nanoparticles was found at 730 K.

Atomic Structure of Cr2O3/Ag(111) and Pd/Cr2O3/Ag(111) Surfaces: A Photoelectron Diffraction Investigation

“…When the Pd was deposited at 300 K, the islands were three-dimensional but with a low aspect ratio . There are also reports on island formation for Pd deposited on oxide surfaces with the corundum structure. ,− Future experiments are planned to extend this investigation for different Pd thicknesses in order to shed light on the Pd growth mechanism on Cr 2 O 3 .…”