Contact

Porträt Dr. Hlawacek, Gregor; FWIZ-N

Dr. Gregor Hlawacek

Head Ion Induced Nanostructures
Ion Microscopy
g.hlawacekAthzdr.de
Phone: +49 351 260 3409
+49 351 260 2411

Ion Induced Nanostructures

We study processes during the interaction of low energy (10 eV – 60 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.

  

Ioneninduzierte Oberflächenprozesse

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:

Foto: A silicon surface after 500 eV Ar+ sputtering under 67° ©Copyright: Dr. Stefan Facsko

Pattern formation and surface analytics

Information about surface modification by low-energy ion irradiation and surface analytics by spectroscopy and scanning probe techniques
Foto: liquid metal ion source ©Copyright: Dr. Lothar Bischoff

Focused Ion Beams

Information about the development and application of focused ion beams using liquid metal alloy ion sources

Helium Ion Microscopy

Information about Helium Ion Microscopy with special emphasis on the Orion NanoFab installed at the HZDR.
Foto: Energy_barriers_XW_MP ©Copyright: Dr. Matthias Posselt

Compu­ter Simulations

Defects and diffusion
Foto: ArBlade - FWIZ-N Instrument ©Copyright: Dr. Nico Klingner

Setups - FWIZ-N

List of our setups for pre­paration, material modifications, analytical methods, and imaging.

Group information:

Group Members - Ion Induced Nanostructures

Current and former group members

Recent publications

Older publications can be found in the database (longer loading time)

2023

The Impact of Energy Filtering on Fluctuation Electron Microscopy

D. Radic, M. Peterlechner, M. Posselt, H. Bracht

Related publications


Deterministic multi-level spin orbit torque switching

J. Kurian, A. Joseph, S. Cherifi-Hertel, C. Fowley, G. Hlawacek, P. Dunne, M. Romeo, G. Atcheson, J. M. D. Coey, B. Doudin

Related publications

Downloads

  • Secondary publication expected from 17.01.2024

2022

Recovery of Release Cloud from Laser Shock-Loaded Graphite and Hydrocarbon Targets: In Search of Diamonds

A. K. Schuster, K. Voigt, B. Klemmed, N. J. Hartley, B. J. Lütgert, C. Bähtz, A. Benad, C. Brabetz, T. Cowan, T. Doeppner, D. Erb, A. Eychmueller, S. Facsko, R. W. Falcone, L. B. Fletcher, S. Frydrych, G. C. Ganzenmüller, D. O. Gericke, S. H. Glenzer, J. Grenzer, U. Helbig, S. Hiermaier, R. Hübner, A. Laso García, H. J. Lee, M. J. Macdonald, E. E. McBride, P. Neumayer, A. Pak, A. Pelka, I. Prencipe, A. Prosvetov, A. Rack, A. Ravasio, R. Redmer, D. Reemts, M. Rödel, M. Schoelmerich, D. Schumacher, M. Tomut, S. J. Turner, A. M. Saunders, P. Sun, J. Vorberger, A. Zettl, D. Kraus

Related publications


Formation of core-shell nanostructure through wrapping of cuprous oxide nanowires by hydrogen titanate nanotubes

S. Patra, P. Das, M. K. Rajbhar, S. Facsko, W. Möller, S. Chatterjee

Related publications


Modified HSE06 functional applied to anatase TiO2: influence of exchange fraction on the quasiparticle electronic structure and optical response

S. Lal Sb, M. Devaraj, M. Posselt, A. Aravindh Sd, A. Sharan

Downloads

  • Secondary publication expected from 10.10.2023

Treating Knock-On Displacements in Fluctuation Electron Microscopy Experiments

D. Radic, M. Peterlechner, M. Posselt, H. Bracht

Related publications


Wafer-scale nanofabrication of telecom single-photon emitters in silicon

M. Hollenbach, N. Klingner, N. Jagtap, L. Bischoff, C. Fowley, U. Kentsch, G. Hlawacek, A. Erbe, N. V. Abrosimov, M. Helm, Y. Berencen, G. Astakhov

Related publications


Atomic mechanisms of self-diffusion in amorphous silicon

M. Posselt, H. Bracht, M. Ghorbani Asl, D. Radić

Related publications

Downloads


Differential evolution optimization of Rutherford back-scattering spectra

R. Heller, N. Klingner, N. Claessens, C. Merckling, J. Meersschaut

Related publications


Epitaxial lateral overgrowth of tin spheres driven and directly observed by helium ion microscopy

N. Klingner, K.-H. Heinig, D. Tucholski, W. Möller, R. Hübner, L. Bischoff, G. Hlawacek, S. Facsko

Related publications

Downloads

  • Secondary publication expected from 19.09.2023

Sustainable Bioengineering of Gold Structured Wide-Area Supported Catalysts for Hand-Recyclable Ultra-Efficient Heterogeneous Catalysis

C. S. Bhatt, D. S. Parimi, T. K. Bollu, H. U. Madhura, N. Jacob, R. Korivi, S. S. Ponugoti, S. Mannathan, S. Ojha, N. Klingner, M. Motapothula, A. K. Suresh

Related publications


Self-driven Broadband Photodetector Based on MoSe2/FePS3 Van der Waals n-p Type-II Heterostructures

J. Duan, P. Chava, M. Ghorbani Asl, Y. Lu, D. Erb, L. Hu, A. Echresh, L. Rebohle, A. Erbe, A. Krasheninnikov, M. Helm, Y.-J. Zeng, S. Zhou, S. Prucnal

Related publications


Dysprosium Liquid Metal Alloy Ion Source For Magnetic Nanostructures

L. Bischoff, N. Klingner, P. Mazarov, K. Lenz, R. Narkovic, W. Pilz, F. Meyer

Related publications

Downloads

  • Secondary publication expected from 10.08.2023

Deterministic Shallow Dopant Implantation in Silicon with Detection Confidence Upper-Bound to 99.85% by Ion–Solid Interactions

A. M. Jakob, S. G. Robson, V. Schmitt, V. Mourik, M. Posselt, D. Spemann, B. C. Johnson, H. R. Firgau, E. Mayes, J. C. McCallum, A. Morello, D. N. Jamieson


Atomistic simulations on the relationship between solid-phase epitaxial recrystallization and self-diffusion in amorphous silicon

M. Posselt, H. Bracht, D. Radic

Related publications

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Real-Time Observation of Temperature-Induced Surface Nanofaceting in M-Plane α-Al2O3

D. Erb, J. Perlich, S. Roth, R. Röhlsberger, K. Schlage


Resonance behavior of embedded and freestanding microscale ferromagnets

H. Cansever, M. S. Anwar, S. Stienen, K. Lenz, R. Narkovic, G. Hlawacek, K. Potzger, O. Hellwig, J. Faßbender, J. Lindner, R. Bali

Related publications


Quantitative nanoscale imaging using transmission He ion channelling contrast: Proof-of-concept and application to study isolated crystalline defects

S. Tabean, M. Mousley, C. Pauly, O. de Castro, E. Serralta Hurtado De Menezes, N. Klingner, G. Hlawacek, T. Wirtz, S. Eswara

Related publications


Contact

Dr. Gregor Hlawacek

Head Ion Induced Nanostructures
Ion Microscopy
g.hlawacekAthzdr.de
Phone: +49 351 260 3409
+49 351 260 2411