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 by self-organization

Information about surface modification by low-energy ion irradiation and surface analytics by scanning probe techniques
Foto: COB model ©Copyright: Dr. Richard Arthur Wilhelm

Highly Charged Ions

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)

2024

Scalable Atomic Arrays for Spin-Based Quantum Computers in Silicon

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

Permalink: https://www.hzdr.de/publications/Publ-39597

Experimental and theoretical studies on self-diffusion in amorphous germanium

T. Böckendorf, J. Kirschbaum, F. Kipke, D. Bougeard, J. Lundsgaard-Hansen, A. Nylandsted-Larsen, M. Posselt, H. Bracht

Involved research facilities

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Permalink: https://www.hzdr.de/publications/Publ-39241

First principles investigation on structural and optoelectronic properties of newly designed Janus lead halides PbXY (X, Y = F, Cl, Br, I )

A. E. Sudheer, G. Tejaswini, M. Posselt, M. Devaraj

Downloads

Permalink: https://www.hzdr.de/publications/Publ-39240

Studies of the morphology of hematite synthesized from waste iron sulfate

K. Splinter, R. Möckel, G. Hlawacek, Z. Lendzion-Bielun

Permalink: https://www.hzdr.de/publications/Publ-39174

Tuning the Electronic Characteristics of Monolayer MoS2-Based Transistors by Ion Irradiation: The Role of the Substrate

Z. Fekri, P. Chava, G. Hlawacek, M. Ghorbani Asl, S. Kretschmer, W. Awan, V. Koladi Mootheri, N. Sycheva, A. George, A. Turchanin, K. Watanabe, T. Taniguchi, M. Helm, A. Krasheninnikov, A. Erbe

Involved research facilities

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Permalink: https://www.hzdr.de/publications/Publ-39152

Metalloid-doping in SMoSe Janus layers: first-principles study on efficient catalysts for the hydrogen evolution reaction

M. Vallinayagam, J. Karthikeyan, M. Posselt, M. Devaraj, M. Zschornak

Permalink: https://www.hzdr.de/publications/Publ-38900

Contribution of black carbon and desert dust to aerosol absorption in the atmosphere of the Eastern Arabian Peninsula

M. M. K. Mahfouz, G. Skok, J. Sciare, M. Pikridas, M. Rami Alfarra, S. Moosakutty, B. Alfoldy, M. Ivančič, M. Rigler, A. Gregorič, R. Podlipec, S. Lohmann, G. Hlawacek, R. Heller, E. Tutsak, G. Močnik

Involved research facilities

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Permalink: https://www.hzdr.de/publications/Publ-38810

Ultralong-term high-density data storage with atomic defects in SiC

M. Hollenbach, C. Kasper, D. Erb, L. Bischoff, G. Hlawacek, H. Kraus, W. Kada, T. Ohshima, M. Helm, S. Facsko, V. Dyakonov, G. Astakhov

Involved research facilities

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Permalink: https://www.hzdr.de/publications/Publ-38750

Transport of dust across the Solar System: Constraints on the spatial origin of individual micrometeorites from cosmic-ray exposure

J. Feige, A. Airo, D. Berger, D. Brückner, A. Gärtner, M. Genge, I. Leya, F. Habibi Marekani, L. Hecht, N. Klingner, J. Lachner, X. Li, S. Merchel, J. Nissen, A. B. C. Patzer, S. Peterson, A. Schropp, C. Sager, M. D. Suttle, R. Trappitsch, J. Weinhold

Involved research facilities

Related publications

Permalink: https://www.hzdr.de/publications/Publ-38222

Defects distribution and evolution in selected-area helium ion implanted 4H-SiC

Y. Song, Z. Xu, M. Rommel, G. Astakhov, G. Hlawacek, F. Fang

Involved research facilities

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Permalink: https://www.hzdr.de/publications/Publ-37512

An intermediate morphology in the patterning of the crystalline Ge(001) surface induced by ion irradiation

D. Erb, D. A. Pearson, T. Skeren, M. Engler, R. M. Bradley, S. Facsko

Involved research facilities

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Permalink: https://www.hzdr.de/publications/Publ-36885

2023

Enhanced Luminescence of Yb3+ Ions Implanted to ZnO through the Selection of Optimal Implantation and Annealing Conditions

R. Ratajczak, E. Guziewicz, S. Prucnal, C. Mieszczynski, P. Jozwik, M. Barlak, S. Romaniuk, S. Gieraltowska, W. Wozniak, R. Heller, U. Kentsch, S. Facsko

Involved research facilities

Related publications

Permalink: https://www.hzdr.de/publications/Publ-38248

Ab initio insights on the ultrafast strong-field dynamics of anatase TiO2

S. L. Suma Balakrishnan, M. Lokamani, K. Ramakrishna, A. Cangi, D. Murali, M. Posselt, S. Assa Aravindh

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Permalink: https://www.hzdr.de/publications/Publ-37571

Challenges of Electron Correlation Microscopy on Amorphous Silicon and Amorphous Germanium

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

Involved research facilities

Related publications

Permalink: https://www.hzdr.de/publications/Publ-37521

Novel Metalless Chalcogen-Based Janus Layers: A Density Functional Theory Study

M. Vallinayagam, A. E. Sudheer, A. S. Aravindh, M. Devaraj, R. Nadarajan, R. Katta, M. Posselt, M. Zschornak

Permalink: https://www.hzdr.de/publications/Publ-37520

Morphology and orientation change of layer-by-layer deposited one- and two-dimensional coordination polymer nanocrystals containing rhodium paddle-wheel units

D. Steinbach, R. Neubert, S. Gersdorf, C. Schimpf, D. Erb, D. Rafaja, F. A. Plamper, F. Mertens

Permalink: https://www.hzdr.de/publications/Publ-37423

Adsorption of Ferritin at Nanofaceted Al2O3 Surfaces

B. K. Pothineni, S. Kollmann, X. Li, G. Grundmeier, D. Erb, A. Keller

Permalink: https://www.hzdr.de/publications/Publ-37213

Roadmap for focused ion beam technologies

K. Höflich, G. Hobler, F. I. Allen, T. Wirtz, G. Rius, A. Krasheninnikov, M. Schmidt, I. Utke, N. Klingner, M. Osenberg, L. McElwee-White, R. Córdoba, F. Djurabekova, I. Manke, P. Moll, M. Manoccio, J. M. de Teresa, L. Bischoff, J. Michler, O. de Castro, A. Delobbe, P. Dunne, O. V. Dobrovolskiy, N. Freese, A. Gölzhäuser, P. Mazarov, D. Koelle, W. Möller, F. Pérez-Murano, P. Philipp, F. Vollnhals, G. Hlawacek

Involved research facilities

Related publications

Permalink: https://www.hzdr.de/publications/Publ-37049

Universal radiation tolerant semiconductor

A. Azarov, J. G. Fernández, J. Zhao, F. Djurabekova, H. He, R. He, Ø. Prytz, L. Vines, U. Bektas, P. Chekhonin, N. Klingner, G. Hlawacek, A. Kuznetsov

Involved research facilities

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Permalink: https://www.hzdr.de/publications/Publ-36900

Direct magnetic manipulation of a permalloy nanostructure by a focused cobalt ion beam

J. Pablo-Navarro, N. Klingner, G. Hlawacek, A. Kakay, L. Bischoff, R. Narkovic, P. Mazarov, R. Hübner, F. Meyer, W. Pilz, J. Lindner, K. Lenz

Involved research facilities

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  • Secondary publication expected from 26.10.2024

Permalink: https://www.hzdr.de/publications/Publ-36822

Fluctuation Electron Microscopy on Amorphous Silicon and Amorphous Germanium

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

Involved research facilities

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Permalink: https://www.hzdr.de/publications/Publ-36691

Transport properties of Fe60Al40 during the B2 to A2 structural phase transition

S. Sorokin, M. S. Anwar, G. Hlawacek, R. Boucher, J. Salgado Cabaco, K. Potzger, J. Lindner, J. Faßbender, R. Bali

Involved research facilities

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Permalink: https://www.hzdr.de/publications/Publ-36384

Bottom-up Fabrication of FeSb₂ Nanowires on Crystalline GaAs Substrates with Ion-induced Pre-patterning

T. Weinert, D. Erb, R. Hübner, S. Facsko

Involved research facilities

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Permalink: https://www.hzdr.de/publications/Publ-36264

The Impact of Energy Filtering on Fluctuation Electron Microscopy

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

Involved research facilities

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Permalink: https://www.hzdr.de/publications/Publ-36147

Deterministic multi-level spin orbit torque switching using focused He+ ion beam irradiation

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

Involved research facilities

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Permalink: https://www.hzdr.de/publications/Publ-35950

Y doping of BaZrO3 may lead to optimum conditions for proton conduction at operating temperature of solid oxide fuel cells: A first principles study

R. Nadarajan, M. Devaraj, S. V. M. Satyanarayana, M. Posselt

Permalink: https://www.hzdr.de/publications/Publ-35289

Tailoring crosstalk between localized 1D spin-wave nanochannels using focused ion beams

V. Iurchuk, J. Pablo-Navarro, T. Hula, R. Narkovic, G. Hlawacek, L. Körber, A. Kakay, H. Schultheiß, J. Faßbender, K. Lenz, J. Lindner

Involved research facilities

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Permalink: https://www.hzdr.de/publications/Publ-35208

CMOS-compatible manufacturability of sub-15 nm Si/SiO2/Si nanopillars containing single Si nanodots for single electron transistor applications

J. Borany, H.-J. Engelmann, K.-H. Heinig, E. Amat, G. Hlawacek, F. Klüpfel, R. Hübner, W. Möller, M.-L. Pourteau, G. Rademaker, M. Rommel, L. Baier, P. Pichler, F. Perez-Murano, R. Tiron

Involved research facilities

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Permalink: https://www.hzdr.de/publications/Publ-34842