Overview of project C05

Exploring Particle-Induced Excitations in the Time Domain

Schleberger, Sokolowski-Tinten, Wucher

The impact of an energetic particle onto a solid surface generates a strongly perturbed and extremely localized non-equilibrium state, which relaxes on very fast time scales. In order to facilitate a time-resolved observation of the relaxation dynamics using established ultrafast pump-probe techniques, it is necessary to pinpoint the projectile impact in time with sufficient accuracy. In this project, we are currently developing a novel ion source which is designed to generate ion pulses of (sub-) picosecond duration. This way, it will be for the first time possible to access the ultrafast ion impact-induced dynamics with an experimental technique.

Detailed ion trajectory simulations (for details see New J. Phys. 21 (2019) 053017 ) show that single ion pulses of sub-picosecond duration can be generated via femtosecond photoionization of rare gas atoms entrained in a supersonic jet. The photoion cloud will be produced with a standard table-top laser system. We could show that Arq+ ions with q = 1–5 can be generated, which are then accelerated to energies in the keV range over a very short distance and bunched to impinge onto the target surface in a time-focused manner. Charge state broadening is insignificant for pulses containing up to 10–20 ions and starts to increase the pulse width only above ~50 ions/pulse.

The realization of a corresponding experimental set-up is now nearly finished and currently being tested in our lab. Once laser-generated ultrashort ion pulses are available, they will be utilized for time resolved studies of, for instance, the local lattice disorder, the transient electronic excitation and the ion-induced particle emission (“sputtering”) following a keV projectile impact.

figure C5

Figure: (1) Neutral atom beam, (2) ultra-short laser pulse, (3) buncher



Erik Pollmann, Juliana M. Morbec, Lukas Madauß, Lara Bröckers, Peter Kratzer and Marika Schleberger
Molybdenum Disulfide Nanoflakes Grown by Chemical Vapor Deposition on Graphite: Nucleation, Orientation, and Charge Transfer
J. Phys. Chem. C 124, 2689 (2020)
DOI: 10.1021/acs.jpcc.9b10120

Lukas Madauß, Erik Pollmann, Tobias Foller, Jens Schumacher, Ulrich Hagemann, Tobias Heckhoff, Matthias Herder, Lucia Skopinski, Lars Breuer, Anke Hierzenberger, Alexandra Wittmar, Henning Lebius, Abdenacer Benyagoub, Mathias Ulbricht, Rakesh Joshi and Marika Schleberger
A Swift Technique to Hydrophobize Graphene and Increase Its Mechanical Stability and Charge Carrier Density
npj 2D Mater. Appl. 4, 11 (2020)
DOI: 10.1038/s41699-020-0148-9

Sascha Creutzburg, Janine Schwestka, A. Niggas, Heena Inani, Mukesh K. Tripathi, Antony George, René Heller, Roland Kozubek, Lukas Madauß, Niall McEvoy, Stefan Facsko, Jani Kotakoski, Marika Schleberger, Andrey A. Turchanin, Pedro Luis Grande, Friedrich Aumayr and Richard Arthur Wilhelm
Vanishing Influence of the Band Gap on the Charge Exchange of Slow Highly Charged Ions in Freestanding Single-Layer MoS2
Phys. Rev. B 102, 045408 (2020)
DOI: 10.1103/PhysRevB.102.045408



Roland Kozubek, Mukesh Tripathi, Mahdi Ghorbani-Asl, Silvan Kretschmer, Lukas Madauß, Erik Pollmann, Maria O'Brien, Niall McEvoy, Ursula Ludacka, Toma Susi, Georg S Duesberg, Richard Arthur Wilhelm, Arkady V Krasheninnikov, Jani Kotakoski and Marika Schleberger
Perforating Freestanding Molybdenum Disulfide Monolayers with Highly Charged Ions
J. Phys. Chem. Lett. 10, 904 (2019)
DOI: 10.1021/acs.jpclett.8b03666

Andreas Wucher, Lars Breuer and Nicholas Winograd
Ionization Probability of Sputtered Indium under Irradiation with 20-keV Fullerene and Argon Gas Cluster Projectiles
Int. J. Mass. Spectrom. 438, 13 (2019)
DOI: 10.1016/j.ijms.2018.12.007

Lars Breuer, Hua Tian, Andreas Wucher and Nicholas Winograd
Molecular SIMS Ionization Probability Studied with Laser Postionization: Influence of the Projectile Cluster
J. Phys. Chem. C 123, 565 (2019)
DOI: 10.1021/acs.jpcc.8b10245

Alexander Breuers, Andreas Wucher, Marika Schleberger, Matthias Herder, Klaus Sokolowski-Tinten and Pawel Kucharczyk
A Concept to Generate Ultrashort Ion Pulses for Pump-Probe Experiments in the keV Energy Range
New J. Phys. 21, 053017 (2019)
DOI: 10.1088/1367-2630/ab1775

Friedrich Aumayr, Kiyoshi Ueda, Emma Sokell, Stefan Schippers, Hossein Sadeghpour, Frédéric Merkt, Thomas F. Gallagher, F. Barry Dunning, Paul Scheier, Olof Echt, Tom Kirchner, Stephan Fritzsche, Andrey Surzhykov, Xinwen Ma, Roberto Rivarola, Omar Fojon, Lokesh Tribedi, Emily Lamour, José R. Crespo López-Urrutia, Yuri A. Litvinov, Vladimir Shabaev, Henrik Cederquist, Henning Zettergren, Marika Schleberger, Richard A Wilhelm, Toshiyuki Azuma, Philippe Boduch, Henning T. Schmidt and Thomas Stöhlker
Roadmap on Photonic, Electronic and Atomic Collision Physics: III. Heavy Particles: with Zero to Relativistic Speeds
J. Phys. B 52, 171003 (2019)
DOI: 10.1088/1361-6455/ab26ea

Janine Schwestka, Anna Niggas, Sascha Creutzburg, Roland Kozubek, René Heller, Marika Schleberger, Richard A Wilhelm and Friedrich Aumayr
Charge-Exchange-Driven Low-Energy Electron Splash Induced by Heavy Ion Impact on Condensed Matter
J. Phys. Chem. Lett. 10, 4805 (2019)
DOI: 10.1021/acs.jpclett.9b01774

Alexander Golombek, Lisa Danzig and Andreas Wucher
Characterization of a Supersonic Gas Jet via Laser-Induced Photoelectron Ionization

Matthias Herder, Julia Klein, A. Sevim and Andreas Wucher
Ionization Probability of Sputtered Coronene Molecules
Nucl. Instrum. Methods B 460, 193 (2019)
DOI: 10.1016/j.nimb.2019.05.008



Roland Kozubek, Philipp Ernst, Charlotte Herbig, Thomas Michely and Marika Schleberger
Fabrication of Defective Single Layers of Hexagonal Boron Nitride on Various Supports for Potential Applications in Catalysis and DNA Sequencing
ACS Appl. Nano Materials 1, 3765 (2018)
DOI: 10.1021/acsanm.8b00903

J. Schwestka, R.A. Wilhelm, E. Gruber, R. Heller, Roland Kozubek, Marika Schleberger, S. Facsko and F. Aumayr
The Role of Radiative De-excitation in the Neutralization Process of Highly Charged Ions Interacting with a Single Layer of Graphene
Nucl. Instrum. Methods B 422, 63 (2018)
DOI: 10.1016/j.nimb.2018.02.022

Pawel Kucharczyk, A. Füngerlings, Boris Weidtmann and Andreas Wucher
Computer Simulation of Sputtering Induced by Swift Heavy Ions
Nucl. Instrum. Methods B 426, 5 (2018)
DOI: 10.1016/j.nimb.2018.04.002

Mario Marpe, Andreas Wucher and Detlef Diesing
The Influence of Internal and External Electric Fields on the Transport of Energetic Electrons in Nanostructures
J. Elec. Spectrosc. Rel. Phenom. 227, 51 (2018)
DOI: 10.1016/j.elspec.2018.07.002

Mario Marpe, Andreas Wucher and Detlef Diesing
Transport of 75–1000  eV Electrons in Metal-Insulator–Metal Devices
J. Elec. Spectrosc. Rel. Phenom. 223, 37 (2018)
DOI: 10.1016/j.elspec.2017.12.005



Richard A. Wilhelm, Elisabeth Gruber, Janine Schwestka, Roland Kozubek, Teresa I. Madeira, José P. Marques, Jacek Kobus, Arkady V. Krasheninnikov, Marika Schleberger and Friedrich Aumayr
Interatomic Coulombic Decay: The Mechanism for Rapid Deexcitation of Hollow Atoms
Phys. Rev. Lett. 119, 103401 (2017)
DOI: 10.1103/PhysRevLett.119.103401

H. Vázquez, E. Harriet Åhlgren, Oliver Ochedowski, Aleksi A. Leino, Rasim Mirzayev, Roland Kozubek, Henning Lebius, Marko Karlušic, Milko Jakšic, Arkady V. Krasheninnikov, Jani Kotakoski, Marika Schleberger, Kai Nordlund and Flyura G. Djurabekova
Creating Nanoporous Graphene with Swift Heavy Ions
Carbon 114, 511 (2017)
DOI: 10.1016/j.carbon.2016.12.015



Elisabeth Gruber, Richard A. Wilhelm, Rémi Pétuya, Valerie Smejkal, Roland Kozubek, Anke Hierzenberger, Bernhard C. Bayer, Iñigo Aldazabal, Andrey K. Kazansky, Florian Libisch, Arkady V. Krasheninnikov, Marika Schleberger, Stefan Facsko, Andrei G. Borisov, Andrés Arnau and Friedrich Aumayr
Ultrafast Electronic Response of Graphene to a Strong and Localized Electric Field
Nat. Commun. 7, 13948 (2016)
DOI: 10.1038/ncomms13948