2 research outputs found
Ion irradiation-induced sinking of Ag nanocubes into substrates
Ion irradiation can cause burrowing of nanoparticles in substrates, strongly
depending on the material properties and irradiation parameters. In this study,
we demonstrate that the sinking process can be accomplished with ion
irradiation of cube-shaped Ag nanoparticles on top of silicon; how ion
channeling affects the sinking rate; and underline the importance of the
amorphous state of the substrate upon ion irradiation. Based on our
experimental findings, the sinking process is described as being driven by
capillary forces enabled by ion-induced plastic flow of the substrate.Comment: the manuscript has 25 pages and 6 figure
Investigation of surface orientation dependent sputtering of Ag
Sputtering of metal surfaces can be both a beneficial phenomenon, for instance in the coating industry, or an undesired side-effect, for instant materials subjected to irradiation. While the average sputtering yields are well known in common metals, recent studies have shown that the yields can depend on the crystallographic orientation of the surface much stronger than commonly appreciated. In this study, we investigate by computational means, molecular dynamics, the sputtering of single crystalline Ag surfaces under various incoming energies. The results at low and high energy are compared to experimental results for single crystalline Ag nanocubes of different orientations. We observe strong differences between the sputtering yields of different surface directions and ion energies. We analyze the results in terms of the atom cluster size of the sputtered materials, and show that the cluster size distribution is a key factor to understand the correspondence between simulations and experiments. At low energies mainly single atoms are sputtered, whereas at higher energies the sputtered material is mainly in atom clusters.Peer reviewe