Niggas, A. (2025, August 21). Angle-resolved ion-induced electron emission spectroscopy from surfaces. Joint Annual Meeting of ÖPG and SPS 2025, Wien, Austria.

Vukovic, F., Niggas, A., Schnack Jürgen, Marks Nigel A., & Wilhelm, R. A. (2025, July 8). Atomistic view of porosity in carbon nanomembranes from molecular dynamics and highly-charged ion spectroscopy. FisMat 2025 Konferenz, Venedig, Italy.

Grossek, A. S., Niggas, A., Wilhelm, R. A., Aumayr, F., & Lemell, C. (2024, September 5). Nanopore formation in 2D materials by impact of slow HC. 21st Highly Charged Ion Conference (HCI-21), Egmond aan Zee, Netherlands (the).

Redl, A., Chirita-Mihaila, M. C., Goldberger, M., Szabo, G., Pachlinger, C., Niggas, A., & Wilhelm, R. A. (2024, July 16). Using ultrafast electron-stimulated desorption to generate picosecond ion pulses. 23rd International Conference on Ultrafast Phenomena, Barcelona, Spain.

Niggas, A. (2024, February 1). Using charge exchange dynamics of highly charged ions to investigate material structures. Seminar Condensed Matter Physics 2024, Bielefeld, Germany.

Niggas, A. (2024, January 31). Nanoscale Shaping of Surfaces Using Slow Highly Charged Ions. AP-Seminare 2023, Darmstadt-Wixhausen, Germany.

Niggas, A., Werl, M., Thima, D., Bernhart, M., Aumayr, F., & Wilhelm, R. A. (2023, October 9). Charge exchange dynamics of slow highly charged ions. 26th International Conference on Ion Beam Analysis (IBA-2023)  18th International Conference on Particle Induced X-ray Emission (PIXE 2023), Toyama, Japan.

Niggas, A., Balzer, K., Aumayr, F., Bonitz, K., & Wilhelm, R. A. (2023, September 14). Charge carrier dynamics in 2D materials upon impact of highly charged ions probed by emitted electrons. 24th International Workshop on Inelastic Ion-Surface Collisions (IISC-24), Charleston, South Carolina, United States of America (the).

Werl, M., Koller, R., Haidegger, P., Niggas, A., Tőkési, K., Aumayr, F., & Wilhelm, R. A. (2023, September 13). The hollow atom formation and de-excitation simulation package. 24th International Workshop on Inelastic Ion-Surface Collisions (IISC-24), Charleston, South Carolina, United States of America (the).

Wilhelm, R. A., Niggas, A., Werl, M., Thima, D., Bennett, R., Grande, P. L., & Aumayr, F. (2023, September 13). Charge exchange of slow heavy ions inside a solid. 24th International Workshop on Inelastic Ion-Surface Collisions (IISC-24), Charleston, South Carolina, United States of America (the).

Wilhelm, R. A., Szabo, G., Jany, B. R., Niggas, A., Szabo, P., Turchanin, A., & Krok, F. (2023, September 13). Charge-state enhanced erosion of metallic gold nanoislands. 24th International Workshop on Inelastic Ion-Surface Collisions ((IISC-24), Charleston, South Carolina, United States of America (the).

Niggas, A. (2023, August 1). Electron emission from 2D materials induced by highly charged ions. 33rd International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC), Ottawa, Canada.

Werl, M., Niggas, A., Koller, T., Haidegger, P., Tökési, K., Aumayr, F., & Wilhelm, R. A. (2023, July 28). A numerical approach to the deexcitation of a hollow atom. 33rd International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC), Ottawa, Canada.

Wilhelm, R. A., Niggas, A., & Aumayr, F. (2023, July 28). Can the ion charge state be observed while travelling within a solid?. 33rd International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC), Ottawa, Canada.

Niggas, A., Werl, M., Thima Daniel, Aumayr, F., & Wilhelm, R. A. (2023, July 24). Electron energy distribution emitted from freestanding single-layer graphene upon impact of highly charged ions. 2nd Symposium on Electron, Photon, and Ion Collisions on Molecular & Atomic  Nanostructures (EPIC-MAN 2), Ottawa, Canada.

Niggas, A. (2023, March 28). Highly charged ion-induced electron emission from atomically thin materials (contributed talk). Frühjahrstagung der Deutschen Physikalischen Gesellschaft (DPG) - Sektion Kondensierte Materie (SKM) 2023, Dresden, Germany.

Niggas, A. (2022, August 29). Charge exchange dynamics of highly charged ions with atomically thin materials. 20th International Conference on the Physics of Highly Charged Ions (HCI 2022), Matsue, Japan.

Niggas, A. (2022, July 18). Surface modification using slow highly charged ions. HITRAP Facility and Experiments - Status and Future Perspectives, Eisenach, Germany.

Niggas, A. (2022). Coincidence technique to study ion-induced electron emission from atomically thin materials; invited talk. SPIE Photonics Europe 2022 Nanophotonics, Strasbourg, France.

Niggas, A. (2022). Electron emission from freestanding 2D materials during slow highly charged ion irradiation; invited talk. 29th International Conference on Atomic Collisions in Solids & 11th International Symposium on Swift Heavy Ions in Matter (ICACS-SHIM 2022), University of Helsinki, Finland.

Niggas, A., Balzer, K., Speckmann, C., Kotakoski, J., Bonitz, M., Aumayr, F., & Wilhelm, R. (2022). Electron emission from 2D materials induced by highly charged ions. 5th European Workshop on Epitaxial Graphene and 2D Materials (EWEG2D´22), St. Moritz, Switzerland.

Niggas, A., Werl, M., Aumayr, F., & Wilhelm, R. (2022). Correlated ion-electron energy and charge exchange spectroscopy following ion transmission through free-standing 2D materials. International Conference on Many Particle Spectroscopy of Atoms, Molecules, Clusters and Surfaces (MPS-2022), Turku, Finland.

Werl, M., Niggas, A., Tökési, K., Aumayr, F., & Wilhelm, R. (2022). A computational approach to the formation and free decay of hollow atoms. 29th International Conference on Atomic Collisions in Solids & 11th International Symposium on Swift Heavy Ions in Matter (ICACS-SHIM 2022), University of Helsinki, Finland.

Muckenhuber, H., Szabo, G. L., Arkadiusz, J., Jany, B. R., Lehner, M., Niggas, A., Kentsch, U., Krok, F., & Wilhelm, R. (2021). Irradiation of Au-nano-islands with highly charged ions and characterization with AFM and SEM. 32nd International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2021), Canada.

Niggas, A. (2021). Atomic-scale carving of nanopores into a van-der-Waals heterostructure using slow highly charged ions. European congress and exhibition on advanced materials and processes (EUROMAT 2021), Graz/Stmk, Austria.

Niggas, A. (2021). Charge exchange dynamics of ions inside solids. Seminar Institut für Allgemeine Physik (IAP), TU Wien, Austria.

Niggas, A. (2021). Peeling graphite layer by layer to study the charge exchange of ions inside a solid. DPG-Frühjahrstagung (DPG Spring Meeting) of the Surface Science Division, SurfaceScience21, virtual, Unknown.

Niggas, A. (2021). The role of ICD in the de-excitation of slow highly charged ions transmitted through freestanding 2D materials. Interatomic Coulombic Decay in External Environments (ICD-X), Glasgow/United Kingdom, United Kingdom of Great Britain and Northern Ireland (the).

Niggas, A., Creutzburg, S., Schwestka, J., Wöckinger, B., Gupta, D., Grande, P. L., Eder, D., Marques, J. P., Bayer, B. C., Aumayr, F., Bennett, R., & Wilhelm, R. (2021). Interatomic Coulombic decay driving the de-excitation of highly charged ions inside of atomically thin materials. 32nd International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2021), Canada.

Szabo, G. L., Fries, J., Niggas, A., & Wilhelm, R. (2021). Generation of picosecond ion pulses using a fast pulse electron beam ion source. 32nd International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2021), Canada.

Werl, M., Niggas, A., Aumayr, F., & Wilhelm, R. (2021). Measuring charge exchange and energy loss of highly charged ions colliding with surfaces under grazing incidence. 32nd International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2021), Canada.

Niggas, A. (2020). Preparing freestanding 2D materials for ion beam spectroscopy. 1st Symposium on Ion-Solid and Atomic Collisions (ISAAC 2020), TU Wien, Austria.

Niggas, A., Schwestka, J., Creutzburg, S., Aumayr, F., & Wilhelm, R. (2019). The role of contaminations on the interaction of highly charged ions with 2D materials. 31st International Conference on Photonic, Electronic and Atomic Collisions (XXXI ICPEAC), Deauville, Normandy, France.

Niggas, A., Schwestka, J., Creutzburg, S., Wilhelm, R., & Aumayr, F. (2019). Electron emission due to ion thransmission through freestanding single layer graphene. 1st Symposium on Electron, Photon and Ion Collisions on Molecular & Atomic Nanostructures (1. EPIC-MAN), Caen, France.

Schwestka, J., Niggas, A., Creutzburg, S., Wilhelm, R., & Aumayr, F. (2019). Highly charged ion impact on graphene leading to the emission of low energy electrons. 31st International Conference on Photonic, Electronic and Atomic Collisions (XXXI ICPEAC), Deauville, Normandy, France.

Schwestka, J., Niggas, A., Wilhelm, R., & Aumayr, F. (2019). Ion-induced electron emission from 2D materials. 10th Workshop “Towards Reality in Nanoscale Materials” (TRNM X), Levi, Finland.

Wilhelm, R., Creutzburg, S., Schwestka, J., Inani, H., Tripathi, M. K., Heller, R., Klingner, N., Niggas, A., Lehnert, T., Leiter, R., Kozubek, R., Facsko, S., Kaiser, U., Kotakoski, J., Schleberger, M., & Aumayr, F. (2019). Energy deposition of heavy ions in freestanding 2D materials. 13th European Conference on Atoms, Molecules and Photons (ECAMP-13), Florence, Italy.

Wilhelm, R., Creutzburg, S., Schwestka, J., Niggas, A., & Aumayr, F. (2019). Charge exchange of heavy ions transmitted through a single layer of molybdenum disulfide. 1st Symposium on Electron, Photon and Ion Collisions on Molecular & Atomic Nanostructures (1. EPIC-MAN), Caen, France.

Wilhelm, R., Creutzburg, S., Schwestka, J., Niggas, A., & Aumayr, F. (2019). Energy deposition of highly charged ions transmitted through single layer MoS₂. 31st International Conference on Photonic, Electronic and Atomic Collisions (XXXI ICPEAC), Deauville, Normandy, France.

Wilhelm, R., Creutzburg, S., Schwestka, J., Niggas, A., & Aumayr, F. (2019). Unraveling energy-loss processes of low energy heavy ions in 2D materials. 1st Symposium on Electron, Photon and Ion Collisions on Molecular & Atomic Nanostructures (1. EPIC-MAN), Caen, France.

Wilhelm, R., P.L., G., Creutzburg, S., Schwestka, J., Niggas, A., & Aumayr, F. (2019). Unraveling energy loss processes of ions in 2D materials - the role of Interatomic Coulombic Decay, the charge state, and charge exchange in nuclear and electronic stopping. 13th European Conference on Atoms, Molecules and Photons (ECAMP-13), Florence, Italy.