Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 69: Nanostructures at Surfaces: Dots, Particles, Clusters
O 69.7: Poster
Mittwoch, 9. März 2016, 18:15–20:30, Poster A
Reconstructed Cu(100)-c(2x2)N surface for self-organized nanoparticle deposition — •Kariman Elshimi, Julia Andrews, Torsten Veltum, Hendrik Bettermann, and Mathias Getzlaff — Institut für Angewandte Physik, Universität Düsseldorf, 40225 Düsseldorf
Self-organized nanoparticle deposition can be achieved on a nanopatterned Cu(100) surface. This enhances optical, electronic and magnetic properties of the materials, which are expected to be used in the near future technologies.
The Cu surface is cleaned in situ by repeated cycles of Ar+ sputtering followed by annealing. The Cu(100)-c(2x2)N surface can be prepared by bombarding this surface with N2+ followed by annealing. With in situ scanning tunneling microscope (STM) and low energy electron diffraction (LEED) we characterize the surface. STM images show different surface morphology for different N2+ doses. The prepared surface at a small N2+ dose shows self-assembled square patches with surface structure c(2x2) on a clean Cu(100) surface.
We can produce different kinds of metal nanoparticles with several size-ranges from the gas phase using a continuously working arc cluster ion source or a magnetron aggregation source. The charged nanoparticles can be subsequently mass-to-charge filtered by an electrostatic quadrupole deflector. Therefore, the deposition and the behavior of the size-selected nanoparticles on the Cu(100)-c(2x2)N surface can be studied by STM and LEED.