Ion Induced Nanostructures
We study processes during the interaction of low energy (10 eV – 50 keV) ions with different charge states with materials, especially for the controlled modification and nano-patterning of their surfaces. Such modifications can be material removal through sputtering of surface atoms but also near surface ion beam mixing, ion beam induced defect engineering, or implantation of guest atoms (see figure below). Bottom up as well as top down surface structuring can be achieved through the use of either broad beam irradiation or focused ion beam irradiation.
The first one allows to roughen, smoothen, or clean technical surfaces. Furthermore, the energy deposited by the continuous ion impact drives the surface out of equilibrium inducing many processes on the surface and the sub-surface region.
Alternatively, focused ion beams allow the top down structuring of surfaces or surface near regions with a high spatial resolution compatible with modern nanostructure fabrication requirements. In our group we employ a wide range of focused ion beams from very light nobel gas ions to small heavy ion clusters to understand the behaviour of materials and create state-of-the-art nanostructures.
Main research topics:
General Colloidal Synthesis of Transition-Metal Disulfide Nanomaterials as Electrocatalysts for Hydrogen Evolution Reaction
C. Meerbach, B. Klemmed, D. Spittel, C. Bauer, Y. J. Park, R. Hübner, H. Y. Jeong, D. Erb, H. S. Shin, V. Lesnyak, A. Eychmüller
Formation of Thin NiGe Films by Magnetron Sputtering and Flash Lamp Annealing
Conductive ITO interfaces for optoelectronic applications based on highly ordered inverse opal thin films
Sputtering of nanostructured tungsten and comparison to modelling with TRI3DYN
- Secondary publication expected from 07.02.2021
Boron Liquid Metal Alloy Ion Sources for Special FIB Applications
- Final Draft PDF 435 kB Secondary publication
Morphology modification of Si nanopillars under ion irradiation at elevated temperatures: plastic deformation and controlled thinning to 10 nm
Strain Anisotropy and Magnetic Domains in Embedded Nanomagnets
Stationary beam full-field transmission helium ion microscopy using sub-50 keV He+: Projected images and intensity patterns
Lithium Ion Beams from Liquid Metal Alloy Ion Sources
W. Pilz, P. Mazarov, N. Klingner, S. Bauerdick, L. Bischoff
- Final Draft PDF 497 kB Secondary publication