[Translate to English:] Gruppenfoto E134-03

Richard A. Wilhelm

If it were easy, someone would have done it already.

Research Interest

My research focuses on the interaction of ions and electrons with solid surfaces. I am particularly interested in inelastic processes, correlated systems, 2D and quantum materials. Together with my team, I develop novel experimental methods in the spectroscopy of scattered particles. My work ranges from basic research to applied research in areas such as nuclear fusion, semiconductor technology and EUV lithography.

2025 - now: Full Professor of Ion Physics, TU Wien
2024 - now: Head of the Research Unit of Atomic and Plasma Physics
2024 Habilitation (venia docendi) in Experimental Physics, TU Wien
2019 FWF START Prize
2017 - now: TU Wien
2014 - 2017: Helmholtz-Zentrum Dresden-Rossendorf (PostDoc)
2010 - 2014: Helmholtz-Zentrum Dresden-Rossendorf & TU Dresden (PhD Student)
2005 - 2010: Diploma Physics, TU Dresden

67 Publications in international, peer-reviewed journals.

ORCiD 0000-0001-9451-5440
ResearcherID E-6939-2011

	Citations	h-Index
Google Scholar	1902	27
Web of Science	1333	22

Stand April 2025

Press releases of TU Wien

Winter term in odd years
- VO 134.120 Lecture to Fundamentals in Physics III
- VO 134.172 Ion-Solid Interactions
Summer term in odd years
- VO 134.205 UHV Technology
- VU 130.003 & 130.004 Exercises to Fundamentals in Physics IIa & IIb
Winter term in even years
- VU 130.001 & 130.002 Exercises to Fundamentals in Physics Ia & Ib
Every term

2025 - now: Editorial Advisory Board Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms (NIM-B)
2024 - now: Scientific Committee International Conference on Highly Charged Ions (HCI)
2023 - now: Scientific Committee International Conference on Atomic Collisions in Solids (ICACS)
2023 - now: Scientific Committee International Workshop on Inelastic Ion Surface Collisions (IISC)
2020 - now: Scientific Committee Conference on Elementary Processes in Atomic Systems (CEPAS)
2020 - now: Evaluation Panel Physics and Astronomy, H2020 MSCA COFUND Action (SASPRO2)
2020 - now: Member of the Chemical-Physical Societa (CPG)
2018 - now: Member of the Austrian Physical Society (ÖPG)
2005 - now: Member of the German Physical Society (DPG)

4 PhD students
- Anna Niggas
- Gabriel Szabo
- Janine Schwestka (co-supervisor)
- Sascha Creutzburg
10 Master students
>15 Bachelor students

>40 Invited Talks
>30 Contributions to international meetings, conferences, and workshops

Gaede-Prize 2020
Max Auwärter Prize 2020
START Prize 2019
Best Lecture Award 2019
IBMM Prize 2018
Research Award of the HZDR 2015

2025: IISC, Frankenfels, Austria
2023: Focus Session at the DPG-SKM spring meeting
2023: EPIC-MAN, Ottawa, Canada
2017: IISC SummerSchool, Dresden, Germany
2017: IISC, Dresden, Germany

In total ca. EUR 2.300.000 in third party funds

FWF START (time4ions)
FWF Standalone and International (DIMAS, CETHIS, CHEXDYN)
FWF doc.funds (TUD-X)
FFG Sondierung (CatIons)
OeAD WTZ (Croatia, Serbia)
DFG Standalone (HELEX2D)

Publikationen in der TU Wien Datenbank (unvollständig vor 2018)

Vojtech, V., Niggas, A., Werl, M., Vukovic, F., Aumayr, F., & Wilhelm, R. A. (2026). Electron emission from a freestanding single layer of graphene due to highly charged ion impact. In ÖGV Seminar 2025 : Booklet of Abstracts (pp. 13–13).
| Electron emission from a freestanding single layer of graphene due to highly charged ion impact at reposiTUm , opens an external URL in a new window

Trachanas, E., Bellan, L., Nagy, G., Palmieri, A., Bignami, A., Wilhelm, R. A., Grespan, F., & Gazis, N. (2025). Investigation of sputtering and erosion phenomena in radio-frequency quadrupoles. Physical Review Accelerators and Beams, 28, Article 104501. https://doi.org/10.1103/fxry-781s
| Investigation of sputtering and erosion phenomena in radio-frequency quadrupoles at reposiTUm , opens an external URL in a new window
Niggas, A., Hao, M., Richter, P., Simperl, F., Blödorn, F., Cap, M., Kero, J., Hofmann, D., Bellissimo, A., Burgdörfer, J., Seyller, T., Wilhelm, R. A., Libisch, F., & Werner, W. S. M. (2025). Identifying electronic doorway states in secondary electron emission from layered materials. Physical Review Letters, 135(16), Article 166401. https://doi.org/10.1103/qls7-tr4v
| Identifying electronic doorway states in secondary electron emission from layered materials at reposiTUm , opens an external URL in a new window
Redl, A., Goldberger, M., & Wilhelm, R. A. (2025). Ultrashort Picosecond Ion Pulses via Laser-Stimulated Desorption for Time-Resolved Ion-Solid Interaction Studies. In IISC : Austria 2025 : Book of Abstracts (pp. 66–66).
| Ultrashort Picosecond Ion Pulses via Laser-Stimulated Desorption for Time-Resolved Ion-Solid Interaction Studies at reposiTUm , opens an external URL in a new window
Brötzner, J., Biber, H. A., Szabo, P. S., Jäggi, N., Fellinger, M., Nagy, G., Pitthan, E., Primetzhofer, D., Wilhelm, R. A., Wurz, P., Galli, A., & Aumayr, F. (2025). Refined Sputter Yields of the Lunar Surface: Experimental Benchmarks and Numerical Modelling. In IISC : Austria 2025 : Book of Abstracts (pp. 47–47).
| Refined Sputter Yields of the Lunar Surface: Experimental Benchmarks and Numerical Modelling at reposiTUm , opens an external URL in a new window
Nagy, G., Séjourné-Lemaire, H., Brötzner, J., Eisenmenger-Sittner, C., & Wilhelm, R. A. (2025). Controlling the ion-induced sputter yield through anisotropic nano-structuring of surfaces. In IISC : Austria 2025 : Book of Abstracts (pp. 83–83).
| Controlling the ion-induced sputter yield through anisotropic nano-structuring of surfaces at reposiTUm , opens an external URL in a new window
Niggas, A., Hao, M., Richter, P., Simperl, F., Blödorn, F., Bellissimo, A., Burgdörfer, J., Seyller, T., Wilhelm, R. A., Libisch, F., & Werner, W. (2025). Identifying Electronic Doorway States in the Secondary Electron Emission from Layered Materials. In IISC : Austria 2025 : Book of Abstracts (pp. 86–86).
| Identifying Electronic Doorway States in the Secondary Electron Emission from Layered Materials at reposiTUm , opens an external URL in a new window
Niggas, A., Thima, D., Vukovic, F., Vojtech, V., Werl, M., Buck, J., Richter, P., Seyller, T., Rossnagel, K., & Wilhelm, R. A. (2025). Angular Distribution of Electrons emitted from Quasi-Freestanding Bilayer Graphene due to Impact of Slow Highly Charged Xenon Ions. In IISC : Austria 2025 : Book of Abstracts (pp. 85–85).
| Angular Distribution of Electrons emitted from Quasi-Freestanding Bilayer Graphene due to Impact of Slow Highly Charged Xenon Ions at reposiTUm , opens an external URL in a new window
Werl, M., Niggas, A., Wrathall, S., Vojtech, V., Vukovic, F., Aumayr, F., & Wilhelm, R. A. (2025). Grazing incidence scattering of highly charged ions. In IISC : Austria 2025 : Book of Abstracts (pp. 99–99).
| Grazing incidence scattering of highly charged ions at reposiTUm , opens an external URL in a new window
Vojtech, V., Niggas, A., Werl, M., Vukovic, F., Aumayr, F., & Wilhelm, R. A. (2025). Does electron emission in highly charged ion collisions with surfaces occur above the surface or below? In IISC : Austria 2025 : Book of Abstracts (pp. 24–24).
| Does electron emission in highly charged ion collisions with surfaces occur above the surface or below? at reposiTUm , opens an external URL in a new window
Vukovic, F., Niggas, A., Ravindran, N., Zobac, V., Susi, T., & Wilhelm, R. A. (2025). Energy loss of highly charged ions in graphene. In IISC : Austria 2025 : Book of Abstracts (pp. 33–33).
| Energy loss of highly charged ions in graphene at reposiTUm , opens an external URL in a new window
Redl, A., Goldberger, M., & Wilhelm, R. A. (2025). Generation and Control of Picosecond Ion Pulses via Laser-Stimulated Desorption from a Tungsten Nanotip. In ECCART 15 : Conference Programme & Abstracts (pp. 43–43).
| Generation and Control of Picosecond Ion Pulses via Laser-Stimulated Desorption from a Tungsten Nanotip at reposiTUm , opens an external URL in a new window
Vojtech, V., Niggas, A., Werl, M., Vukovic, F., Aumayr, F., & Wilhelm, R. A. (2025). Collisions of highly charged ions with surfaces: Does electron emission occur above the surface or below? In ECAART15 : Conference Program & Abstracts (pp. 29–29).
| Collisions of highly charged ions with surfaces: Does electron emission occur above the surface or below? at reposiTUm , opens an external URL in a new window
Werl, M., Niggas, A., Wrathall, S., Vojtech, V., Vukovic, F., Aumayr, F., Tőkési, K., & Wilhelm, R. A. (2025). Probing the Lifetimes of Hollow Atoms in Free Decay. In 34th International Conference on Photonic, Electronic and Atomic Collisions : ICPEAC 2025 : Book of Abstracts (pp. 504–504).
| Probing the Lifetimes of Hollow Atoms in Free Decay at reposiTUm , opens an external URL in a new window
Wilhelm, R. A., Niggas, A., Vojtech, V., & Aumayr, F. (2025). Coincidence detection of scattered ions and emitted electrons from 2D materials. In 34th International Conference on Photonic, Electronic and Atomic Collisions : ICPEAC 2025 : Book of Abstracts (pp. 369–369).
| Coincidence detection of scattered ions and emitted electrons from 2D materials at reposiTUm , opens an external URL in a new window
Redl, A., Goldberger, M., & Wilhelm, R. A. (2025). Generation of Picosecond Ion Pulses using Laser-Stimulated Desorption. In 34th International Conference on Photonic, Electronic and Atomic Collisions : ICPEAC 2025 : Book of Abstracts (pp. 288–288).
| Generation of Picosecond Ion Pulses using Laser-Stimulated Desorption at reposiTUm , opens an external URL in a new window
Brötzner, J., Biber, H. A., Szabo, P. S., Jäggi, N., Fellinger, M., Nagy, G., Pitthan, E., Primetzhofer, D., Wilhelm, R. A., Wurz, P., Galli, A., & Aumayr, F. (2025). Solar Wind Ion Bombardment of the Lunar Surface: Experimental and Numerical Sputtering Investigations. In 34th International Conference on Photonic, Electronic and Atomic Collisions : ICPEAC 2025 : Book of Abstracts (pp. 204–204).
| Solar Wind Ion Bombardment of the Lunar Surface: Experimental and Numerical Sputtering Investigations at reposiTUm , opens an external URL in a new window
Brötzner, J., Biber, H. A., Szabo, P., Fellinger, M., Jäggi, N., Nagy, G., Pitthan, E., Primetzhofer, D., Wilhelm, R. A., Galli, A., Wurz, P., & Aumayr, F. (2025). Erosion of the lunar surface by solar wind ions. In ECAMP 15 Book of Abstracts (pp. 57–58).
| Erosion of the lunar surface by solar wind ions at reposiTUm , opens an external URL in a new window
Niggas, A., Thima Daniel, Vukovic, F., Vojtech, V., Werl, M., Buck, J., Rossnagel, K., & Wilhelm, R. A. (2025). Angle-resolved spectroscopy of low-energy secondary electrons from surfaces emitted by highly charged ion impact. In ÖGV Seminar 2025 : Booklet of Abstracts (pp. 14–14).
| Angle-resolved spectroscopy of low-energy secondary electrons from surfaces emitted by highly charged ion impact at reposiTUm , opens an external URL in a new window
Redl, A., Goldberger, M., & Wilhelm, R. A. (2025). Generation of sub-100 Picosecond Ion Pulses by Laser-Stimulated Desorption in Ultrahigh Vacuum. In ÖGV Seminar 2025 : Booklet of Abstracts (pp. 16–16).
| Generation of sub-100 Picosecond Ion Pulses by Laser-Stimulated Desorption in Ultrahigh Vacuum at reposiTUm , opens an external URL in a new window
Wilhelm, R. A., Buck, J., Vojtech, V., Vukovic, F., Niggas, A., & Rossnagl, K. (2025). Tailoring quantum materials by ion beams. In ÖGV Seminar 2025 : Booklet of Abstracts (pp. 15–15).
| Tailoring quantum materials by ion beams at reposiTUm , opens an external URL in a new window
Niggas, A., Probst, D., Ravindran, N., Kofler, C., Speckmann, C., Vukovic, F., Grossek, A. S., Lemell, C., Aumayr, F., Susi, T., Kotakoski, J., & Wilhelm, R. A. (2025). Nanostructuring Of 2D Materials Using Slow Highly Charged Ions. In Defect-Mediated Engineering of Nanomaterials for Energy and Quantum Applications : Beilstein Nanotechnology Symposium 2025 : Book of Abstracts (pp. 66–67).
| Nanostructuring Of 2D Materials Using Slow Highly Charged Ions at reposiTUm , opens an external URL in a new window
Vukovic, F., Niggas, A., Ehrens, J., Mihlan, L., Schnack, J., Marks, N., & Wilhelm, R. A. (2025). Revealing the atomistic structure of carbon nanomembranes: molecular dynamics simulations and experiments with highly charged ions. In Defect-Mediated Engineering of Nanomaterials for Energy and Quantum Applications : Beilstein Nanotechnology Symposium 2025 : Book of Abstracts (pp. 59–60).
| Revealing the atomistic structure of carbon nanomembranes: molecular dynamics simulations and experiments with highly charged ions at reposiTUm , opens an external URL in a new window
Niggas, A., Vojtech, V., Wilhelm, R. A., & Aumayr, F. (2025). What can be learnt from electrons emitted or captured during highly charged ion transmission through 2D Materials? In A. Arnau & P. M. Echenique (Eds.), 3S´25. Symposium on Surface Science 2025. Contributions (pp. 89–89).
| What can be learnt from electrons emitted or captured during highly charged ion transmission through 2D Materials? at reposiTUm , opens an external URL in a new window
Wilhelm, R. A., Niggas, A., Bruck, J., Thima, D., Vojtech, V., Vukovic, F., Werl, M., & Rossnagel, K. (2025). Chirality switching in 1T -TaS2 induced by highly charged ion irradiation. In Defect-mediated engineering of nanomaterials for energy and quantum applications : Beilstein Nanotechnology Symposium 2025 : Book of Abstracts (pp. 17–18).
| Chirality switching in 1T -TaS2 induced by highly charged ion irradiation at reposiTUm , opens an external URL in a new window
Werl, M., Koller, T., Haidegger, P., Wrathall, S., Eßletzbichler, L., Niggas, A., Aumayr, F., Tökési, K., & Wilhelm, R. A. (2025). Lifetime of a freely decaying hollow atom. Physical Review Research (PRResearch), 7(1), Article 013176. https://doi.org/10.1103/PhysRevResearch.7.013176
| Lifetime of a freely decaying hollow atom at reposiTUm , opens an external URL in a new window
Brötzner, J., Biber, H., Szabo, P. S., Jäggi, N., Fuchs, L., Nenning, A., Fellinger, M., Nagy, G., Pitthan, E., Primetzhofer, D., Mutzke, A., Wilhelm, R. A., Wurz, P., Galli, A., & Aumayr, F. (2025). Solar wind erosion of lunar regolith is suppressed by surface morphology and regolith properties. Communications Earth & Environment, 6(1), 5601–5609. https://doi.org/10.1038/s43247-025-02546-0
| Solar wind erosion of lunar regolith is suppressed by surface morphology and regolith properties at reposiTUm , opens an external URL in a new window
Nastran, M., Peschek, P., Walendzik, I., Rath, J., Fickl, B., Schubert, J. S., Ipsmiller, W., Bartl, A., Mauschitz, G., Szabo, G., Wilhelm, R. A., Schmidt, J., Eder, D., & Bayer, B. C. (2025). Liquid phase exfoliation of graphene using ammonia as an easy-to-remove additive in low-boiling organic-water co-solvent suspensions. Communications Chemistry, 8(1). https://doi.org/10.1038/s42004-025-01517-y
| Liquid phase exfoliation of graphene using ammonia as an easy-to-remove additive in low-boiling organic-water co-solvent suspensions at reposiTUm , opens an external URL in a new window
Niggas, A., Aumayr, F., & Wilhelm, R. A. (2025). Trajectory-dependent highly charged ion-induced electron yield from single-layer graphene. Physica Scripta, 100(1), 1–7. https://doi.org/10.1088/1402-4896/ad94af
| Trajectory-dependent highly charged ion-induced electron yield from single-layer graphene at reposiTUm , opens an external URL in a new window
Niggas, A., Thima, D., Vukovic, F., Vojtech, V., Werl, M., Buck, J., Rossnagel, K., & Wilhelm, R. A. (2025). Angle-resolved spectroscopy of secondary electrons from surfaces emitted by highly charged ion impact. In ECAMP 15 Book of Abstracts (pp. 96–97).
| Angle-resolved spectroscopy of secondary electrons from surfaces emitted by highly charged ion impact at reposiTUm , opens an external URL in a new window
Vojtech, V., Niggas, A., Werl, M., Vukovic, F., Aumayr, F., & Wilhelm, R. A. (2025). Does electron emission in highly charged ion collisions with surfaces occur above the surface or below? In ECAMP 15 Book of Abstracts (pp. 97–97).
| Does electron emission in highly charged ion collisions with surfaces occur above the surface or below? at reposiTUm , opens an external URL in a new window
Werl, M., Niggas, A., Vukovic, F., Aumayr, F., Tőkési, K., Wilhelm, R. A., Wrathall, S., & Vojtech, V. (2025). The lifetime of a freely decaying hollow atom. In ECAMP 15 Book of Abstracts (pp. 128–129).
| The lifetime of a freely decaying hollow atom at reposiTUm , opens an external URL in a new window

Niggas, A., Vukuovic Filip, Aumayr, F., & Wilhelm, R. A. (2024). Charge Exchange of Highly Charged Ions in 2D Materials. In 73rd Annual Meeting of the Austrian Physical Society: ÖPG Tagungsband Nr. 73 (pp. 126–126).
| Charge Exchange of Highly Charged Ions in 2D Materials at reposiTUm , opens an external URL in a new window
Niggas, A., Thima Daniel, Vukovic, F., Vojtech, V., Werl, M., Buck, J., Eisenmenger-Sittner, C., Aumayr, F., Lemell, C., Rossnagel, K., & Wilhelm, R. A. (2024). Angle- and Energy-Resolved Spectroscopy of Electrons Emitted from Surfaces by Impact of Slow Highly Charged Ions. In 21st Highly Charged Ions Conference: Book of Abstracts. 21st International Highly Charged Ions Conference (HCI-21), Egmond aan Zee, Netherlands (the).
| Angle- and Energy-Resolved Spectroscopy of Electrons Emitted from Surfaces by Impact of Slow Highly Charged Ions at reposiTUm , opens an external URL in a new window
Thima, D., Niggas, A., Werl, M., Szabo, G., Laux, P., Schmidt, M., Zschornack, G., Aumayr, F., & Wilhelm, R. A. (2024). A compact electron beam ion source for highly charged ion experiments at remote large-scale user facilities. In 21st Highly Charged Ions Conference: Book of Abstracts (pp. 56–56).
| A compact electron beam ion source for highly charged ion experiments at remote large-scale user facilities at reposiTUm , opens an external URL in a new window
Wilhelm, R. A., Niggas, A., Vukovic, F., Grossek, A., Lemell, C., & Aumayr, F. (2024). On the interaction of slow highly charged ions with 2D materials. In 21st Highly Charged Ions Conference: Book of Abstracts. 21st International Highly Charged Ions Conference (HCI-21), Egmond aan Zee, Netherlands (the).
| On the interaction of slow highly charged ions with 2D materials at reposiTUm , opens an external URL in a new window
Assink, L., Brötzner, J., Cupak, C., Salverda, M., Jonkman, H. T., Versolato, O. O., Wilhelm, R. A., & Hoekstra, R. (2024). On the question whether surface roughness can explain the absence of a prominent single-collision peak in keV heavy-ion scattering off a polycrystalline Ru surface. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 554, Article 165442. https://doi.org/10.1016/j.nimb.2024.165442
| On the question whether surface roughness can explain the absence of a prominent single-collision peak in keV heavy-ion scattering off a polycrystalline Ru surface at reposiTUm , opens an external URL in a new window
Niggas, A., Werl, M., Vojtech, V., Vukovic, F., Aumayr, F., & Wilhelm, R. A. (2024). Highly-charged-ion-induced electron emission from surfaces. In Book of Abstracts: The 15th International Symposium Electron Beam Ion Sources and Traps (EBIST 2024) (pp. 13–13).
| Highly-charged-ion-induced electron emission from surfaces at reposiTUm , opens an external URL in a new window
Thima, D., Niggas, A., Werl, M., Szabo, G., Laux, P., Schmidt, M., Zschornack, G., Aumayr, F., & Wilhelm, R. A. (2024). A compact electron beam ion source for highly charged ion experiments at large-scale user facilities. Journal of Physics B: Atomic, Molecular and Optical Physics, 57(16), 1–7. https://doi.org/10.1088/1361-6455/ad6384
| A compact electron beam ion source for highly charged ion experiments at large-scale user facilities at reposiTUm , opens an external URL in a new window
Niggas, A., Werl, M., Aumayr, F., & Wilhelm, R. A. (2024). Charge exchange of slow highly charged ions from an electron beam ion trap with surfaces and 2D materials. Journal of Physics B: Atomic, Molecular and Optical Physics, 57, Article 072001. https://doi.org/10.1088/1361-6455/ad2e2a
| Charge exchange of slow highly charged ions from an electron beam ion trap with surfaces and 2D materials at reposiTUm , opens an external URL in a new window
Grossek, A. S., Niggas, A., Wilhelm, R. A., Aumayr, F., & Lemell, C. (2024). Model for Nanopore Formation in Two-Dimensional Materials by Impact of Highly Charged Ions. In 3S’24 : Symposium on Surface Science 2024 (pp. 125–126). https://doi.org/10.34726/8459
| Model for Nanopore Formation in Two-Dimensional Materials by Impact of Highly Charged Ions at reposiTUm , opens an external URL in a new window
Niggas, A., Thima Daniel, Werl, M., Buck, J., Simperl, F., Blödorn, F., Rossnagel, K., Werner, W., Aumayr, F., & Wilhelm, R. A. (2024). On the low-energy secondary electron emission from surfaces. In 3S’24: Symposium on Surface Science 2024: Contributions (pp. 139–140).
| On the low-energy secondary electron emission from surfaces at reposiTUm , opens an external URL in a new window
Chirita-Mihaila, M. C., Szabo, G., Redl, A., Goldberger, M., Niggas, A., & Wilhelm, R. A. (2024). Generation of ultrashort ion pulses from ultrafast electron-stimulated desorption. Physical Review Research (PRResearch), 6(3), L0320661–L0320668. https://doi.org/10.1103/PhysRevResearch.6.L032066
| Generation of ultrashort ion pulses from ultrafast electron-stimulated desorption at reposiTUm , opens an external URL in a new window

Niggas, A., Fischer, L., Kretschmer, S., Werl, M., Biber, H., Speckmann, C., McEvoy, N., Kotakoski, J., Aumayr, F., Krasheninnikov, A. V., & Wilhelm, R. A. (2023). Charge-exchange-dependent energy loss of H and He in freestanding monolayers of graphene and MoS₂. Physical Review A, 108(6), 0628231–0628238. https://doi.org/10.1103/PhysRevA.108.062823
| Charge-exchange-dependent energy loss of H and He in freestanding monolayers of graphene and MoS₂ at reposiTUm , opens an external URL in a new window
Wilhelm, R. A., Deuzeman, M. J., Rai, S., Husinsky, W., Szabo, P. S., Biber, H. A., Stadlmayr, R., Cupak, C., Hundsbichler, J., Lemell, C., Möller, W., Mutzke, A., Hobler, G., Versolato, O. O., Aumayr, F., & Hoekstra, R. (2023). On the missing single collision peak in low energy heavy ion scattering. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 544, Article 165123. https://doi.org/10.1016/j.nimb.2023.165123
| On the missing single collision peak in low energy heavy ion scattering at reposiTUm , opens an external URL in a new window
Niggas, A., Werl, M., & Wilhelm, R. A. (2023). Neutralisation of highly charged ions at surfaces. In 21st Atomic Processes in Plasmas Conference (pp. 104–104).
| Neutralisation of highly charged ions at surfaces at reposiTUm , opens an external URL in a new window
Szabo, G., Jany, B. R., Muckenhuber, H., Niggas, A., Lehner, M., Janas, A., Szabo, P., Gan, Z., George, A., Turchanin, A., Krok, F., & Wilhelm, R. A. (2023). Charge-State-Enhanced Ion Sputtering of Metallic Gold Nanoislands. Small, Article 2207263. https://doi.org/10.1002/smll.202207263
| Charge-State-Enhanced Ion Sputtering of Metallic Gold Nanoislands at reposiTUm , opens an external URL in a new window
Wilhelm, R. A., Niggas, A., Aumayr, F., & Kotakoski, J. (2023). Extended defect production in 2D materials by the impact of individual slow highly charged ions. In Defects in Two-dimensional Materials - 750. WE-Heraeus-Seminar (pp. 50–50).
| Extended defect production in 2D materials by the impact of individual slow highly charged ions at reposiTUm , opens an external URL in a new window

Grossek, A. S., Niggas, A., Wilhelm, R. A., Aumayr, F., & Lemell, C. (2022). Model for Nanopore Formation in Two-Dimensional Materials by Impact of Highly Charged Ions. Nano Letters, 22(23), 9679–9684. https://doi.org/10.1021/acs.nanolett.2c03894
| Model for Nanopore Formation in Two-Dimensional Materials by Impact of Highly Charged Ions at reposiTUm , opens an external URL in a new window
Dergham, P., Aumayr, F., Lamour, E., Macé, S., Prigent, C., Steydli, S., Vernhet, D., Werl, M., Wilhelm, R. A., & Trassinelli, M. (2022). Toward Probing Surface Magnetism with Highly Charged Ions. Atoms, 10(4), Article 151. https://doi.org/10.3390/atoms10040151
| Toward Probing Surface Magnetism with Highly Charged Ions at reposiTUm , opens an external URL in a new window
Ishikawa, N., Fujimura, Y., Kondo, K., Szabo, G. L., Wilhelm, R. A., Ogawa, H., & Taguchi, T. (2022). Surface nanostructures on Nb-doped SrTiO₃ irradiated with swift heavy ions at grazing Incidence. Nanotechnology, 33(23), 235303. https://doi.org/10.1088/1361-6528/ac58a5
| Surface nanostructures on Nb-doped SrTiO₃ irradiated with swift heavy ions at grazing Incidence at reposiTUm , opens an external URL in a new window
Niggas, A., Schwestka, J., Balzer, K., Weichselbaum, D., Schlünzen, N., Heller, R., Creutzburg, S., Inani, H., Tripathi, M., Speckmann, C., McEvoy, N., Susi, T., Kotakoski, J., Gan, Z., George, A., Turchanin, A., Bonitz, M., Aumayr, F., & Wilhelm, R. A. (2022). Ion-Induced Surface Charge Dynamics in Freestanding Monolayers of Graphene and MoS2 Probed by the Emission of Electrons. Physical Review Letters, 129(8), 086802-1-086802–086809. https://doi.org/10.1103/PhysRevLett.129.086802
| Ion-Induced Surface Charge Dynamics in Freestanding Monolayers of Graphene and MoS2 Probed by the Emission of Electrons at reposiTUm , opens an external URL in a new window
Niggas, A., Schwestka, J., Weichselbaum, D., Heller, R., Aumayr, F., & Wilhelm, R. A. (2022). Coincidence technique to study ion-induced electron emission from atomically thin materials. In Nanophotonics IX. Proc. of SPIE. https://doi.org/10.1117/12.2624402
| Coincidence technique to study ion-induced electron emission from atomically thin materials at reposiTUm , opens an external URL in a new window
Niggas, A., Weichselbaum, D., Aumayr, F., & Wilhelm, R. A. (2022). Energy distribution of electrons emitted from atomically thin materials due to highly charged ion impact. In 3S*22 Symposium on Surface Science 2022 , St. Christoph am Arlberg, Austria, March 13 - 19, 2022 (editors: F. Aumayr, U. Diebold, and C. C. Lemell) (pp. 161–162).
| Energy distribution of electrons emitted from atomically thin materials due to highly charged ion impact at reposiTUm , opens an external URL in a new window
Szabo, P. S., Weichselbaum, D., Biber, H., Cupak, C., Mutzke, A., Wilhelm, R. A., & Aumayr, F. (2022). Graphical user interface for SDTrimSP to simulate sputtering, ion implantation and the dynamic effects of ion irradiation. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 522, 47–53. https://doi.org/10.1016/j.nimb.2022.04.008
| Graphical user interface for SDTrimSP to simulate sputtering, ion implantation and the dynamic effects of ion irradiation at reposiTUm , opens an external URL in a new window
Wilhelm, R. A. (2022). The charge exchange of slow highly charged ions at surfaces unraveled with freestanding 2D materials. Surface Science Reports, 77(4), 1–32. https://doi.org/10.1016/j.surfrep.2022.100577
| The charge exchange of slow highly charged ions at surfaces unraveled with freestanding 2D materials at reposiTUm , opens an external URL in a new window
Wilhelm, R. A., Niggas, A., Werl, M., & Aumayr, F. (2022). Ion charge exchange spectroscopy with 2D materials. In 3S*22 Symposium on Surface Science 2022 , St. Christoph am Arlberg, Austria, March 13 - 19, 2022 (editors: F. Aumayr, U. Diebold, and C. C. Lemell) (pp. 145–146).
| Ion charge exchange spectroscopy with 2D materials at reposiTUm , opens an external URL in a new window

Creutzburg, S., Mergl, M., Hübner, R., Jirka, I., Erb, D., Heller, R., Niggas, A., Grande, P. L., Aumayr, F., Wilhelm, R. A., Kalbac, M., & Facsko, S. (2021). Fluorination of graphene leads to susceptibility for nanopore formation by highly charged ion impact. Physical Review Materials, 5(074007). https://doi.org/10.1103/physrevmaterials.5.074007
| Fluorination of graphene leads to susceptibility for nanopore formation by highly charged ion impact at reposiTUm , opens an external URL in a new window
Creutzburg, S., Niggas, A., Weichselbaum, D., Grande, P. L., Aumayr, F., & Wilhelm, R. A. (2021). Angle-dependent charge exchange and energy loss of slow highly charged ions in freestanding graphene. Physical Review A, 104(042806). https://doi.org/10.1103/physreva.104.042806
| Angle-dependent charge exchange and energy loss of slow highly charged ions in freestanding graphene at reposiTUm , opens an external URL in a new window
Cupak, C., Szabo, P. S., Biber, H., Stadlmayr, R., Grave, C., Fellinger, M., Brötzner, J., Wilhelm, R. A., Möller, W., Mutzke, A., Moro, M. V., & Aumayr, F. (2021). Sputter yields of rough surfaces: Importance of the mean surface inclination angle from nano- to microscopic rough regimes. Applied Surface Science, 570(151204), 151204. https://doi.org/10.1016/j.apsusc.2021.151204
| Sputter yields of rough surfaces: Importance of the mean surface inclination angle from nano- to microscopic rough regimes at reposiTUm , opens an external URL in a new window
Neumann, C., Wilhelm, R. A., Küllmer, M., & Turchanin, A. (2021). Low-energy electron irradiation induced synthesis of molecular nanosheets: An influence of the electron beam energy. Faraday Discussions, 227, 61–79. https://doi.org/10.1039/c9fd00119k
| Low-energy electron irradiation induced synthesis of molecular nanosheets: An influence of the electron beam energy at reposiTUm , opens an external URL in a new window
Niggas, A., Creutzburg, S., Schwestka, J., Wöckinger, B., Gupta, T., Grande, P. L., Eder, D., Marques, J. P., Bayer, B. C., Aumayr, F., Bennett, R., & Wilhelm, R. A. (2021). Peeling graphite layer by layer reveals the charge exchange dynamics of ions inside a solid. Communications Physics, 4(180). https://doi.org/10.1038/s42005-021-00686-1
| Peeling graphite layer by layer reveals the charge exchange dynamics of ions inside a solid at reposiTUm , opens an external URL in a new window
Niggas, A., Schwestka, J., Creutzburg, S., Weichselbaum, D., Vojtech, V., Grossek, A. S., Libisch, F., Lemell, C., Inani, H., George, A., Heller, R., McEvoy, N., Kotakoski, J., Turchanin, A., Aumayr, F., & Wilhelm, R. A. (2021). The interaction of highly charged ions with freestanding 2D materials; invited talk. In Proc. of the XXV International Conference on Ion-Surface Interactions (ISI-2021), editors: E.Yu. Zykova, P.A. Karaseov, A.I. Titov, V.E. Yurasova, 23.-27.08.2021, Moscow/Russia, Vol.2; National Research University Higher School of Economics MEPhi (pp. 182–185).
| The interaction of highly charged ions with freestanding 2D materials; invited talk at reposiTUm , opens an external URL in a new window
Szabo, G. L., Lehner, M., Bischoff, L., Pilz, W., Kentsch, U., Aumayr, F., Klingner, N., & Wilhelm, R. A. (2021). Nano-hillock formation on CaF2 due to cluster-ion irradiation; invited talk. In Proc. of the XXV International Conference on Ion-Surface Interactions (ISI-2021), editors: E.Yu. Zykova, P.A. Karaseov, A.I. Titov, V.E. Yurasova, 23.-27.08.2021, Moscow/Russia, Vol.1; National Research University Higher School of Economics MEPh (pp. 49–53).
| Nano-hillock formation on CaF2 due to cluster-ion irradiation; invited talk at reposiTUm , opens an external URL in a new window
Szabo, G. L., Lehner, M., Bischoff, L., Pilz, W., Muckenhuber, H., Kentsch, U., Aumayr, F., Klinger, N., & Wilhelm, R. (2021). Nano-hillock formation on CaF₂ due to individual slow Au-cluster impacts. Nanotechnology, 32(35), 355701. https://doi.org/10.1088/1361-6528/ac037e
| Nano-hillock formation on CaF₂ due to individual slow Au-cluster impacts at reposiTUm , opens an external URL in a new window
Wilhelm, R. A. (2021). Hohe Ladung trifft dünne Schicht. Physik Journal, 20, 64–67.
| Hohe Ladung trifft dünne Schicht at reposiTUm , opens an external URL in a new window

Creutzburg, S., Schwestka, J., Niggas, A., Inani, H., Tripathi, M., George, A., Heller, R., Kozubek, R., Madauß, L., McEvoy, N., Facsko, S., Kotakoski, J., Schleberger, M., Turchanin, A., Grande, P. L., Aumayr, F., & Wilhelm, R. A. (2020). Vanishing influence of the band gap on charge exchange of slow highly charged ions in freestanding-single layer MoS₂. Physical Review B, 102(4), Article 045408. https://doi.org/10.1103/physrevb.102.045408
| Vanishing influence of the band gap on charge exchange of slow highly charged ions in freestanding-single layer MoS₂ at reposiTUm , opens an external URL in a new window
Fuchs, D., Bayer, B. C., Gupta, T., Szabo, G. L., Wilhelm, R. A., Eder, D., Meyer, J. C., Steiner, S., & Gollas, B. (2020). Electrochemical Behavior of Graphene in a Deep Eutectic Solvent. ACS Applied Materials and Interfaces, 12(36), 40937–40948. https://doi.org/10.1021/acsami.0c11467
| Electrochemical Behavior of Graphene in a Deep Eutectic Solvent at reposiTUm , opens an external URL in a new window
Niggas, A., Schwestka, J., Creutzburg, S., Gupta, T., Bayer-Skoff, B. C., Aumayr, F., & Wilhelm, R. A. (2020). How to clean a sample when sputtering is not possible because the sample has only one atomic layer? In Conference Proceedings 3S*20 "Symposium on Surface Science 2020 (pp. 129–130).
| How to clean a sample when sputtering is not possible because the sample has only one atomic layer? at reposiTUm , opens an external URL in a new window
Niggas, A., Schwestka, J., Creutzburg, S., Gupta, T., Eder, D., Bayer, B. C., Aumayr, F., & Wilhelm, R. A. (2020). The role of contaminations in ion beam spectroscopy with freestanding 2D materials: a study on thermal treatment. The Journal of Chemical Physics, 153(1), 014702. https://doi.org/10.1063/5.0011255
| The role of contaminations in ion beam spectroscopy with freestanding 2D materials: a study on thermal treatment at reposiTUm , opens an external URL in a new window
Schwestka, J., Inani, H., Tripathi, M., Niggas, A., McEvoy, N., Libisch, F., Aumayr, F., Kotakoski, J., & Wilhelm, R. A. (2020). Atomic-Scale Carving of Nanopores into a van der Waals Heterostructure with Slow Highly Charged Ions. ACS Nano, 14(8), 10536–10543. https://doi.org/10.1021/acsnano.0c04476
| Atomic-Scale Carving of Nanopores into a van der Waals Heterostructure with Slow Highly Charged Ions at reposiTUm , opens an external URL in a new window
Schwestka, J., Niggas, A., Inani, H., Creutzburg, S., Kotakoski, J., Wilhelm, R. A., & Aumayr, F. (2020). Perforation of 2D heterostructures. In Conference Proceedings 3S*20 "Symposium on Surface Science 2020 (pp. 79–80).
| Perforation of 2D heterostructures at reposiTUm , opens an external URL in a new window
Stadlmayr, R., Szabo, P. S., Biber, H., Koslowski, H. R., Kadletz, E., Cupak, C., Wilhelm, R. A., Schmid, M., Linsmeier, C., & Aumayr, F. (2020). A high temperature dual-mode quartz crystal microbalance technique for erosion and thermal desorption spectroscopy measurements. Review of Scientific Instruments, 91(12), 125104. https://doi.org/10.1063/5.0012028
| A high temperature dual-mode quartz crystal microbalance technique for erosion and thermal desorption spectroscopy measurements at reposiTUm , opens an external URL in a new window
Stadlmayr, R., Szabo, P. S., Mayer, D., Cupak, C., Dittmar, T., Bischoff, L., Möller, S., Rasiński, M., Wilhelm, R. A., Möller, W., & Aumayr, F. (2020). Sputtering of Nanostructured Tungsten and Comparison to Modelling with TRI3DYN. Journal of Nuclear Materials, 532(152019), 152019. https://doi.org/10.1016/j.jnucmat.2020.152019
| Sputtering of Nanostructured Tungsten and Comparison to Modelling with TRI3DYN at reposiTUm , opens an external URL in a new window
Wilhelm, R. A. (2020). On the highly charged ion transmission spectroscopy applied to 2D materials. Journal of Physics: Conference Series, 1412(6), 062010. https://doi.org/10.1088/1742-6596/1412/6/062010
| On the highly charged ion transmission spectroscopy applied to 2D materials at reposiTUm , opens an external URL in a new window

Aumayr, F., Ueda, K., Sokell, E., Schippers, S., Sadeghpour, H., Merkt, F., Gallagher, T. F., Dunning, F. B., Scheier, P., Echt, O., Kirchner, T., Fritzsche, S., Surzhykov, A., Ma, X., Rivarola, R., Fojon, O., Tribedi, L., Lamour, E., Crespo López-Urrutia, J. R., … Stöhlker, T. (2019). Roadmap on photonic, electronic and atomic collision physics: III. Heavy particles: with zero to relativistic speeds. Journal of Physics B: Atomic, Molecular and Optical Physics, 52(17), 171003. https://doi.org/10.1088/1361-6455/ab26ea
| Roadmap on photonic, electronic and atomic collision physics: III. Heavy particles: with zero to relativistic speeds at reposiTUm , opens an external URL in a new window
El-Said, A. S., Wilhelm, R. A., Heller, R., & Facsko, S. (2019). Creation of surface nanostructures in lanthanum fluoride single crystals by irradiation with slow highly charged ions. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 460, 137–140. https://doi.org/10.1016/j.nimb.2019.01.007
| Creation of surface nanostructures in lanthanum fluoride single crystals by irradiation with slow highly charged ions at reposiTUm , opens an external URL in a new window
Kozubek, R., Tripathi, M., Ghorbani-Asl, M., Kretschmer, S., Madauß, L., Pollmann, E., O’Brien, M., McEvoy, N., Ludacka, U., Susi, T., Duesberg, G. S., Wilhelm, R. A., Krasheninnikov, A. V., Kotakoski, J., & Schleberger, M. (2019). Perforating Freestanding Molybdenum Disulfide Monolayers with Highly Charged Ions. Journal of Physical Chemistry Letters, 10(5), 904–910. https://doi.org/10.1021/acs.jpclett.8b03666
| Perforating Freestanding Molybdenum Disulfide Monolayers with Highly Charged Ions at reposiTUm , opens an external URL in a new window
Schwestka, J., Niggas, A., Creutzburg, S., Kozubek, R., Heller, R., Schleberger, M., Wilhelm, R. A., & Aumayr, F. (2019). Charge-exchange-driven low-energy electron splash induced by heavy ion impact on condensed matter. Journal of Physical Chemistry Letters, 10(17), 4805–4811. https://doi.org/10.1021/acs.jpclett.9b01774
| Charge-exchange-driven low-energy electron splash induced by heavy ion impact on condensed matter at reposiTUm , opens an external URL in a new window
Wilhelm, R. A., & Grande, P. L. (2019). Unraveling energy loss processes of low energy heavy ions in 2D materials. Communications Physics, 2(89). https://doi.org/10.1038/s42005-019-0188-7
| Unraveling energy loss processes of low energy heavy ions in 2D materials at reposiTUm , opens an external URL in a new window

Wilhelm, R. A., Gruber, E., Schwestka, J., Heller, R., Fascko, S., & Aumayr, F. (2018). Neutralization dynamics of slow highly charged ions in 2D materials. APPLIED SCIENCES-BASEL, 8(7), Article 1050. https://doi.org/10.3390/app8071050
| Neutralization dynamics of slow highly charged ions in 2D materials at reposiTUm , opens an external URL in a new window
Schwestka, J., Melinc, D., Heller, R., Niggas, A., Leonhartsberger, L., Winter, H., Facsko, S., Aumayr, F., & Wilhelm, R. A. (2018). A versatile ion beam spectrometer for studies of ion interaction with 2D materials. Review of Scientific Instruments, 89(8), 085101. https://doi.org/10.1063/1.5037798
| A versatile ion beam spectrometer for studies of ion interaction with 2D materials at reposiTUm , opens an external URL in a new window
Schwestka, J., Wilhelm, R. A., Creutzburg, S., Heller, R., Kouzubek, R., Schleberger, M., Facsko, S., & Aumayr, F. (2018). Interaction of highly charged ions with 2D materials. In Proceedings 3S*18 Symposium on Surface Science 2018, Symposium on Surface Science 2018 (3S*18) (pp. 129–130).
| Interaction of highly charged ions with 2D materials at reposiTUm , opens an external URL in a new window
Schwestka, J., Wilhelm, R. A., Gruber, E., Heller, R., Kozubek, R., Schleberger, M., Facsko, S., & Aumayr, F. (2018). The role of radiative de-excitation in the neutralization process of highly charged ions interacting with a single layer of graphene. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 422, 63–67. https://doi.org/10.1016/j.nimb.2018.02.022
| The role of radiative de-excitation in the neutralization process of highly charged ions interacting with a single layer of graphene at reposiTUm , opens an external URL in a new window

Schwestka, J., Gruber, E., Wilhelm, R. A., Smejkal, V., Melinc, D., Leonhartsberger, L., Kozubek, R., Hierzenberger, A., Schleberger, M., Facsko, S., & Aumayr, F. (2017). Interaction of highly charged ions with single layer graphene. In Proc. of the XXIII International Conference on Ion-Surface Interactions (ISI-2017), editors: E.Yu. Zykova, P.A. Karaseov, A.I. Titov, V.E. Yurasovam, 21.-25.08.2015, Moscow, Russia (pp. 21–25). National Research University Higher School of Economics.
| Interaction of highly charged ions with single layer graphene at reposiTUm , opens an external URL in a new window
Sorokin, M., El-Said, A. S., Wilhelm, R. A., Heller, R., Facsko, S., & Aumayr, F. (2017). Structuring of the lithium fluoride surface by highly charged ions. In Proc. of the XXIII International Conference on Ion-Surface Interactions (ISI-2017), editors: E.Yu. Zykova, P.A. Karaseov, A.I. Titov, V.E. Yurasovam, 21.-25.08.2015, Moscow, Russia, (pp. 64–66). National Research University Higher School of Economics.
| Structuring of the lithium fluoride surface by highly charged ions at reposiTUm , opens an external URL in a new window
Wilhelm, R. A., Gruber, E., Schwestka, J., Kozubek, R., Madeira, T. I., Marques, J. P., Kobus, J., Krasheninnikov, A. V., Schleberger, M., & Aumayr, F. (2017). Interatomic Coulombic Decay - the mechanism for rapid de-excitation of hollow atoms. Physical Review Letters, 119(103401). https://doi.org/10.1103/physrevlett.119.103401
| Interatomic Coulombic Decay - the mechanism for rapid de-excitation of hollow atoms at reposiTUm , opens an external URL in a new window
Wilhelm, R. A., Schwestka, J., Gruber, E., Heller, R., Kozubek, R., Schleberger, M., Facsko, S., & Aumayr, F. (2017). Radiative and non-radiative de-excitation of slow highly charged ions transmitted through freestanding single layer graphene. In Proc. of the XXIII International Conference on Ion-Surface Interactions (ISI-2017), editors: E.Yu. Zykova, P.A. Karaseov, A.I. Titov, V.E. Yurasovam, 21.-25.08.2015, Moscow, Russia (pp. 24–26). National Research University Higher School of Economics.
| Radiative and non-radiative de-excitation of slow highly charged ions transmitted through freestanding single layer graphene at reposiTUm , opens an external URL in a new window

El-Said, A. S., Wilhelm, R. A., Heller, R., Sorokin, M., Facsko, S., & Aumayr, F. (2016). Tuning the fabrication of nanostructures by low-energy highly charged ions. Physical Review Letters, 117(126101). https://doi.org/10.1103/physrevlett.117.126101
| Tuning the fabrication of nanostructures by low-energy highly charged ions at reposiTUm , opens an external URL in a new window
Gruber, E., Wilhelm, R., Pétuya, R., Smejkal, V., Kozubek, R., Hierzenberger, A., Bayer, B. C., Aldazabal, I., Kazansky, A. K., Libisch, F., Krasheninnikov, A. V., Schleberger, M., Facsko, S., Borisov, A. G., Arnau, A., & Aumayr, F. (2016). Ultrafast electronic response of graphene to a strong and localized electric field. Nature Communications, 7, Article 13948. https://doi.org/10.1038/ncomms13948
| Ultrafast electronic response of graphene to a strong and localized electric field at reposiTUm , opens an external URL in a new window
Wilhelm, R. A., Gruber, E., Smejkal, V., Facsko, S., & Aumayr, F. (2016). Charge-state-dependent energy loss of slow ions. I. Experimental results on the transmission of highly charged ions. Physical Review A, 93(052708). https://doi.org/10.1103/physreva.93.052708
| Charge-state-dependent energy loss of slow ions. I. Experimental results on the transmission of highly charged ions at reposiTUm , opens an external URL in a new window

Aumayr, F., Wilhelm, R. A., Gruber, E., Ritter, R., Heller, R., & Fascko, S. (2015). Transmission of slow highly charged ions through graphene and ultrathin carbon nanomembranes. In Transmission of slow highly charged ions through graphene and ultrathin carbon nanomembranes Les Arcs 1800, France March 22 - 28, 2015 (editors: F. Cheynis, S. Curiotto, F. Leroy, P. Müller) (pp. 30–31). Proc. Symposium on Surface Science 2015 (3S*15).
| Transmission of slow highly charged ions through graphene and ultrathin carbon nanomembranes at reposiTUm , opens an external URL in a new window
Gruber, E., Wilhelm, R. A., Smejkal, V., Heller, R., Facsko, S., & Aumayr, F. (2015). Interaction of highly charged ions with carbon nano membranes. Journal of Physics: Conference Series, 635(1), 012027. https://doi.org/10.1088/1742-6596/635/1/012027
| Interaction of highly charged ions with carbon nano membranes at reposiTUm , opens an external URL in a new window
Wilhelm, R. A., El-Said, A. S., Krok, F., Heller, R., Gruber, E., Aumayr, F., & Facsko, S. (2015). Highly charged ion induced nanostructures at surfaces by strong electronic excitations. Progress in Surface Science, 90, 377–395.
| Highly charged ion induced nanostructures at surfaces by strong electronic excitations at reposiTUm , opens an external URL in a new window
Wilhelm, R. A., Gruber, E., Ritter, R., Heller, R., Beyer, A., Turchanin, A., Klingner, N., Hübner, R., Stöger-Pollach, M., Vieker, H., Hlawacek, G., Gölzhäuser, A., Facsko, S., & Aumayr, F. (2015). Threshold and efficiency for perforation of 1 nm thick carbon nanomembranes with slow highly charged ions. 2D Materials, 2, 0350091–0350096.
| Threshold and efficiency for perforation of 1 nm thick carbon nanomembranes with slow highly charged ions at reposiTUm , opens an external URL in a new window

El-Said, A. S., Heller, R., Wilhelm, R. A., Facsko, S., & Aumayr, F. (2014). Surface modifications of BaF₂ and CaF₂ single crystals by slow highly charged ions. Applied Surface Science, 310, 169–173.
| Surface modifications of BaF₂ and CaF₂ single crystals by slow highly charged ions at reposiTUm , opens an external URL in a new window
El-Said, A. S., Wilhelm, R. A., Heller, R., Ritter, R., Wachter, G., Facsko, S., Lemell, C., Burgdörfer, J., & Aumayr, F. (2014). Nanostructuring CaF₂ surfaces with slow highly charged ions. Journal of Physics: Conference Series, 488(1), 012002. https://doi.org/10.1088/1742-6596/488/1/012002
| Nanostructuring CaF₂ surfaces with slow highly charged ions at reposiTUm , opens an external URL in a new window
El-Said, A. S., Wilhelm, R. A., Heller, R., Ritter, R., Wachter, G., Facsko, S., Lemell, C., Wilhelm, R. A., Heller, R., Facsko, S., Ritter, R., Burgdörfer, J., & Aumayr, F. (2014). Nano-structuring of CaF2 surfaces by slow highly charged ions: simulation and experiment. In Plenary lectures, progress reports and special reports. Journal of Physics: Conference Series.
| Nano-structuring of CaF2 surfaces by slow highly charged ions: simulation and experiment at reposiTUm , opens an external URL in a new window
Gruber, E., Wilhelm, R. A., Heller, R., Smejkal, V., Ritter, R., Facsko, S., & Aumayr, F. (2014). Interaction of slow highly charged ions with carbon nano membranes. In Proc. 3S*14 Symposium on Surface Science 2014 (pp. 127–128).
| Interaction of slow highly charged ions with carbon nano membranes at reposiTUm , opens an external URL in a new window
Wachter, G., Tökési, K., Betz, G., Lemell, C., Burgdörfer, J., El-Said, A. S., Wilhelm, R. A., Heller, R., Facsko, S., Ritter, R., & Aumayr, F. (2014). Nano-structuring of CaF2 surfaces by slow highly charged ions: simulation and experiment. Journal of Physics: Conference Series, 488(13), 132015. https://doi.org/10.1088/1742-6596/488/13/132015
| Nano-structuring of CaF2 surfaces by slow highly charged ions: simulation and experiment at reposiTUm , opens an external URL in a new window
Wilhelm, R. A., Gruber, E., Ritter, R., Heller, R., Facsko, S., & Aumayr, F. (2014). Charge Exchange and Energy Loss of Slow Highly Charged Ions in 1 nm Thick Carbon Nanomembranes. Physical Review Letters, 112, 1532011–1532015.
| Charge Exchange and Energy Loss of Slow Highly Charged Ions in 1 nm Thick Carbon Nanomembranes at reposiTUm , opens an external URL in a new window

Ritter, R., Shen, Q., Wilhelm, R. A., Heller, R., Ginzel, R., Crespo López-Urrutia, J. R., Facsko, S., Teichert, C., & Aumayr, F. (2013). Novel aspects on the irradiation of HOPG surfaces with slow highly charged ions. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 315, 252–256.
| Novel aspects on the irradiation of HOPG surfaces with slow highly charged ions at reposiTUm , opens an external URL in a new window
Ritter, R., Wilhelm, R. A., Ginzel, R., Schadauer, P., Heller, R., Rupp, W., López-Urrutia, J. R. C., Facsko, S., & Aumayr, F. (2013). Effect of chemical etching on poly (methyl methacrylate) irradiated with slow highly charged ions. Physica Scripta, T156, 014065. https://doi.org/10.1088/0031-8949/2013/t156/014065
| Effect of chemical etching on poly (methyl methacrylate) irradiated with slow highly charged ions at reposiTUm , opens an external URL in a new window
Ritter, R., Wilhelm, R. A., Stöger-Pollach, M., Heller, R., Mücklich, A., Werner, U., Vieker, H., Beyer, A., Facsko, S., Gölzhäuser, A., & Aumayr, F. (2013). Fabrication of nanopores in 1 nm thick carbon nanomembranes with slow highly charged ions. Applied Physics Letters, 102(6), Article 063112. https://doi.org/10.1063/1.4792511
| Fabrication of nanopores in 1 nm thick carbon nanomembranes with slow highly charged ions at reposiTUm , opens an external URL in a new window
Ritter, R., Wilhelm, R. A., Stöger-Pollach, M., Mücklich, A., Werner, W. S. M., Beyer, A., Fascko, S., Gölzhäuser, A., & Aumayr, F. (2013). Nanopores fabricated in 1nm thick carbon nanomembranes by slow highly charged ions. In Proc. 3S*13 Symposium on Surface Science 2013, Åre, Sweden (March 3 - 9, 2013) editors: J. Gustafson and E. Lundgren (pp. 133–134). Proc. Conf. Symp. on Surface Science 2013 (3S`13).
| Nanopores fabricated in 1nm thick carbon nanomembranes by slow highly charged ions at reposiTUm , opens an external URL in a new window

El-Said, A. S., Wilhelm, R. A., Heller, R., Facsko, S., Lemell, C., Wachter, G., Burgdörfer, J., Ritter, R., & Aumayr, F. (2012). Phase Diagram for Nanostructuring CaF₂ Surfaces by Slow Highly Charged Ions. Physical Review Letters, 109(11), Article 117602. https://doi.org/10.1103/physrevlett.109.117602
| Phase Diagram for Nanostructuring CaF₂ Surfaces by Slow Highly Charged Ions at reposiTUm , opens an external URL in a new window
Aumayr, F., El-Said, A. S., Heller, R., Wilhelm, R., Wachter, G., Ritter, R., Facsko, S., Lemell, C., & Burgdörfer, J. (2012). Phase diagram for nanostructuring CaF2 surfaces by slow highly charged ions. In Conf. Proc. 3S*12 Symposium on Surface Science 2012 (pp. 129–130).
| Phase diagram for nanostructuring CaF2 surfaces by slow highly charged ions at reposiTUm , opens an external URL in a new window
Aumayr, F., El-Said, A. S., Wilhelm, R. A., Heller, R., Facsko, S., Lemell, C., Wachter, G., Burgdörfer, J., & Ritter, R. (2012). Phase diagram for nanostructuring CaF2 surfaces by slow highly charged ions. In Book of Abstracts, ICACS-25 (p. 184).
| Phase diagram for nanostructuring CaF2 surfaces by slow highly charged ions at reposiTUm , opens an external URL in a new window
Aumayr, F., Heller, R., Meissl, W., Schrempf, D., Wilhelm, R. A., Winklehner, D., & Facsko, S. (2012). Electron emission statistics of slow highly charged ions during interaction with insulating surfaces. In Book of Abstracts, ICACS-25 (p. 209).
| Electron emission statistics of slow highly charged ions during interaction with insulating surfaces at reposiTUm , opens an external URL in a new window
Heller, R., Meissl, W., Schrempf, D., Wilhelm, R. A., Winklehner, D., Facsko, S., & Aumayr, F. (2012). Electron emission statistics of slow highly charged ions during interaction with insulating surfaces. In Book of Abstracts, 16th International Conference on the Physics of Highly Charged Ions (HCI 2012) (p. 54).
| Electron emission statistics of slow highly charged ions during interaction with insulating surfaces at reposiTUm , opens an external URL in a new window
Ritter, R., Kowarik, G., Ginzel, R., Wilhelm, R., Heller, R., Papaléo, R. M., Rupp, W., Crespo López-Urrutia, J. R., Ullrich, J., Fascko, S., & Aumayr, F. (2012). Nano-craters due to impact of individual highly charged ions on surfaces and thin films. Journal of Physics: Conference Series, 388(13), 132028. https://doi.org/10.1088/1742-6596/388/13/132028
| Nano-craters due to impact of individual highly charged ions on surfaces and thin films at reposiTUm , opens an external URL in a new window
Ritter, R., Shen, Q., Teichert, C., Wilhelm, R. A., Facsko, S., Ginzel, R., Crespo López-Urrutia, J. R., & Aumayr, F. (2012). Characterisation of nanostructures induced by slow highly charged ion bombardment of HOPG. In Book of Abstracts, ICACS-25 (p. 94).
| Characterisation of nanostructures induced by slow highly charged ion bombardment of HOPG at reposiTUm , opens an external URL in a new window
Ritter, R., Wilhelm, R. A., Ginzel, R., Heller, R., Rupp, W., Crespo López-Urrutia, J. R., Facsko, S., & Aumayr, F. (2012). Ion beam lithography with slow highly charged ions. In Book of Abstracts, 16th International Conference on the Physics of Highly Charged Ions (HCI 2012) (p. 144).
| Ion beam lithography with slow highly charged ions at reposiTUm , opens an external URL in a new window
Ritter, R., Wilhelm, R. A., Ginzel, R., Kowarik, G., Heller, R., El-Said, A. S., Papaléo, R. M., Rupp, W., Crespo López-Urrutia, J. R., Ullrich, J., Facsko, S., & Aumayr, F. (2012). Pit formation on poly(methyl methacrylate) due to ablation induced by individual slow highly charged ion impact. EPL, 97(1), 13001. https://doi.org/10.1209/0295-5075/97/13001
| Pit formation on poly(methyl methacrylate) due to ablation induced by individual slow highly charged ion impact at reposiTUm , opens an external URL in a new window
Ritter, R., Wilhelm, R. A., Stöger-Pollach, M., Mücklich, A., Werner, U., Beyer, A., Facsko, S., Gölzhäuser, A., & Aumayr, F. (2012). Nano-holes milled in 1 nm thick carbon nanomembranes with slow highly charged ions. In Book of Abstracts, 19th International Workshop on Inelastic Ion-Surface Collisions (IISC-19) (p. 32).
| Nano-holes milled in 1 nm thick carbon nanomembranes with slow highly charged ions at reposiTUm , opens an external URL in a new window
Ritter, R., Wilhelm, R. A., Stöger-Pollach, M., Mücklich, A., Werner, U., Beyer, A., Facsko, S., Gölzhäuser, A., & Aumayr, F. (2012). Nanopores milled in carbon nanomembranes due to impact of individual slow highly charged ions. In Book of Abstracts, 16th International Conference on the Physics of Highly Charged Ions (HCI 2012) (p. 143).
| Nanopores milled in carbon nanomembranes due to impact of individual slow highly charged ions at reposiTUm , opens an external URL in a new window

El-Said, A. S., Wilhelm, R. A., Heller, R., Facsko, S., Trautmann, C., & Aumayr, F. (2011). Surface nanostructuring of SrTiO_{3} single crystals by slow highly charged ions and swift heavy ions. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 269(11), 1234–1237. https://doi.org/10.1016/j.nimb.2010.10.020
| Surface nanostructuring of SrTiO_{3} single crystals by slow highly charged ions and swift heavy ions at reposiTUm , opens an external URL in a new window

Facsko, S., Heller, R., Wilhelm, R., El-Said, A. S., Meissl, W., Kowarik, G., Ritter, R., & Aumayr, F. (2010). Surface nanostructures induced by slow highly charged ions. In Proc. 3S*10 Symposium on Surface Science 2010 (pp. 87–88). Symposium on Surface Science 2010 (3S10).
| Surface nanostructures induced by slow highly charged ions at reposiTUm , opens an external URL in a new window

Facsko, S., Meissl, W., Heller, R., Wilhelm, R., El-Said, A. S., Kowarik, G., Ritter, R., & Aumayr, F. (2009). Nanostructures induced by highly charged ions on CaF₂ and KBr. Journal of Physics: Conference Series, 194, 0120601–0120608.
| Nanostructures induced by highly charged ions on CaF₂ and KBr at reposiTUm , opens an external URL in a new window

Univ.Prof. Dr.rer.nat.Richard Arthur Wilhelm

Head, Research Unit of Atomic and Plasma Physics

Phone: +43 664 60588 3435 Call Richard Arthur Wilhelm

Send email to Richard Arthur Wilhelm

Show room DC05L16 on the map , opens an external URL in a new window

ORCID iD of Univ.Prof. Dr.rer.nat. Richard Arthur Wilhelm , opens an external URL in a new window

Research profile of Univ.Prof. Dr.rer.nat. Richard Arthur Wilhelm , opens an external URL in a new window

Fördergeber

[Translate to English:] Logos der Funding Agencies

Lebenslauf

wilhelm_cv_public.pdf (pdf 2 MB)

Publikationsliste

wilhelm_publlist.pdf (pdf 224 KB)

07. November 2025

New Scanning Electron Microscope Installed at IAP

Since the beginning of November, a state-of-the-art Zeiss Sigma HD-VP scanning electron microscope is supporting research at the Institute of Applied Physics. Three research areas share the new device.

Photo of the Zeiss Sigma HD-VP scanning electron microscope in the electron microscopy laboratory at the IAP. The image shows the device and the connected control monitors for imaging and analysis. — © Gyula Nagy
Zeiss Sigma HD-VP Scanning Electron Microscope
The new Zeiss Sigma HD-VP Scanning Electron Microscope in the laboratory of the Institute of Applied Physics at TU Wien

On November 7, 2025, a new Zeiss Sigma HD-VP scanning electron microscope (SEM) was put into operation at the Institute of Applied Physics. The device is shared by the three research units “Atomic and Plasma Physics,” “Applied Interface Physics,” and “Physics of Three-dimensional Nanomaterials.”

The new microscope is equipped with several detectors that enable high-resolution imaging using secondary electrons (SEM), backscattered electrons, X-rays (EDX), and electron diffraction (EBSD).

One of the important areas of application will be fusion research, as the new instrument allows detailed morphological and elemental analysis of material surfaces – both before and after ion irradiation.

We are delighted about this important expansion of our infrastructure – and look forward to the many exciting results that will be made possible with the new SEM!

Univ.Prof. Dr.rer.nat.Richard Arthur Wilhelm

Head, Research Unit of Atomic and Plasma Physics

Phone: +43 664 60588 3435 Call Richard Arthur Wilhelm

Send email to Richard Arthur Wilhelm

Show room DC05L16 on the map , opens an external URL in a new window

ORCID iD of Univ.Prof. Dr.rer.nat. Richard Arthur Wilhelm , opens an external URL in a new window

Research profile of Univ.Prof. Dr.rer.nat. Richard Arthur Wilhelm , opens an external URL in a new window

Fördergeber

Lebenslauf

wilhelm_cv_public.pdf (pdf 2 MB)

Publikationsliste

wilhelm_publlist.pdf (pdf 224 KB)

07. November 2025

New Scanning Electron Microscope Installed at IAP

The new microscope is equipped with several detectors that enable high-resolution imaging using secondary electrons (SEM), backscattered electrons, X-rays (EDX), and electron diffraction (EBSD).

We are delighted about this important expansion of our infrastructure – and look forward to the many exciting results that will be made possible with the new SEM!

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SimpleSAML	This is needed to distinguish between the sessions of the logged-in users.	session	HTTP	Login TU Wien
SimpleSAMLAuthToken	This is needed to distinguish between the sessions of the logged-in users.	session	HTTP	Login TU Wien
fe_typo_user	Is needed so that in case of a Typo3 frontend login the session ID is recognized to grant access to protected areas.	session	HTTP	Homepage TU Wien
staticfilecache	Is needed to optimize the delivery time of the website.	session	HTTP	Homepage TU Wien
JESSIONSID	Is needed so that in case of a LectureTube the session ID is recognized to grant access to protected areas.	session	HTTP	LectureTube TU Wien
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Name	Purpose	Lifetime	Type	Provider
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_pk_ref	Is used to store the information of the users home website.	6 months	HTML	Matomo TU Wien
_pk_ses	Is needed to store temporary data of the visit.	30 minutes	HTML	Matomo TU Wien

Name	Purpose	Lifetime	Type	Provider
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fbm	Is needed to store account data (marketing/tracking).	1 year	HTTP	Meta
xs	Is needed to store a unique session ID (marketing/tracking).	1 year	HTTP	Meta
wd	Is needed to log the screen resolution.	1 week	HTTP	Meta
fr	Is needed to serve ads and measure and improve their relevance.	3 months	HTTP	Meta
act	Is needed to store logged in users (marketing/tracking).	90 days	HTTP	Meta
_fbp	Is needed to store and track visits to various websites (marketing/tracking).	3 months	HTTP	Meta
datr	Is needed to identify the browser for security and website integrity purposes, including account recovery and identification of potentially compromised accounts.	2 years	HTTP	Meta
dpr	Is used for analysis purposes. Technical parameters are logged (e.g. aspect ratio and dimensions of the screen) so that Facebook apps can be displayed correctly.	1 week	HTTP	Meta
sb	Is needed to store browser details and security information of the Facebook account.	2 years	HTTP	Meta
dbln	Is needed to store browser details and security information of the Facebook account.	2 years	HTTP	Meta
spin	Is needed for promotional purposes and social campaign reporting.	session	HTTP	Meta
presence	Contains the "chat" status of logged in users.	1 month	HTTP	Meta
cppo	Is needed for statistical purposes.	90 days	HTTP	Meta
locale	Is needed to save the language settings.	session	HTTP	Meta
pl	Required for Facebook Pixel.	2 years	HTTP	Meta
lu	Required for Facebook Pixel.	2 years	HTTP	Meta
c_user	Required for Facebook Pixel.	3 months	HTTP	Meta
bcookie	Is needed to store browser data (marketing/tracking).	2 years	HTTP	LinkedIn
li_oatml	Is needed to identify LinkedIn members outside of LinkedIn for advertising and analytics purposes.	1 month	HTTP	LinkedIn
BizographicsOptOut	Is needed to save privacy settings.	10 years	HTTP	LinkedIn
li_sugr	Is needed to store browser data (marketing/tracking).	3 months	HTTP	LinkedIn
UserMatchHistory	Is needed to provide advertising or retargeting (marketing/tracking).	30 days	HTTP	LinkedIn
linkedin_oauth_	Is needed to provide cross-page functionality.	session	HTTP	LinkedIn
lidc	Is needed to store performed actions on the website (marketing/tracking).	1 day	HTTP	LinkedIn
bscookie	Is needed to store performed actions on the website (marketing/tracking).	2 years	HTTP	LinkedIn
X-LI-IDC	Is needed to provide cross-page functionality (marketing/tracking).	session	HTTP	LinkedIn
AnalyticsSyncHistory	Stores the time when the user was synchronized with the "lms_analytics" cookie.	30 days	HTTP	LinkedIn
lms_ads	Is needed to identify LinkedIn members outside of LinkedIn.	30 days	HTTP	LinkedIn
lms_analytics	Is needed to identify LinkedIn members for analytics purposes.	30 days	HTTP	LinkedIn
li_fat_id	Required for indirect member identification used for conversion tracking, retargeting and analytics.	30 days	HTTP	LinkedIn
U	Is needed to identify the browser.	3 months	HTTP	LinkedIn
_guid	Is needed to identify a LinkedIn member for advertising via Google Ads.	90 days	HTTP	LinkedIn

Richard A. Wilhelm

Research Interest

Key stages

Scientific Publications

Teaching

Committees and Board Memberships

Graduates

Conference contributions

Prizes and awards

Conference organization

Third party funding

In total ca. EUR 2.300.000 in third party funds

Publikationen in der TU Wien Datenbank (unvollständig vor 2018)

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

Univ.Prof. Dr.rer.nat.Richard Arthur Wilhelm

Fördergeber

Lebenslauf

Publikationsliste

New Scanning Electron Microscope Installed at IAP

Univ.Prof. Dr.rer.nat.Richard Arthur Wilhelm

Fördergeber

Lebenslauf

Publikationsliste

New Scanning Electron Microscope Installed at IAP