Laser Spectroscopy
Publications

PhD Theses

4. A. Lehr, The Interplay of Geometric and Electronic Structure in (Doped) Tetrel Clusters: A Study of Optical Spectroscopy and Magnetic Deflection in the Molecular Beam, Dissertation, Technical University of Darmstadt (2023) Link
3. M. Jäger, Optoelectronic Properties of Molecular Semiconductor Systems, Dissertation, Technical University Darmstadt (2021) Link
2. A. Shayeghi, Bindungsverhältnisse und optische Eigenschaften kleinster Gold-Silber-Legierungsbausteine: Photodissoziationsspektroskopie und Quantenchemie isolierter Metallcluster, Dissertation, Technical University Darmstadt (2016) Link
1. U. Lumb, Development of a Molecular-Beam Apparatus for the High-Resolution Multi-Photon Ionization Spectroscopy of isolated Atoms and Molecules Using the Example of Titanium(II)oxide, Dissertation, Technical University Darmstadt (2018) Link

Publications

22. A. Macion, R. Schäfer, Ionization Potentials of Metal Clusters Studied With a Broad Range, Tunable Vacuum Ultraviolet Light Source, Rev. Sci. Instrum. 94, 063101 (2023) Link
21. A. Lehr, F. Rivic, M. Jäger, M. Gleditzsch, R. Schäfer, Optical Absorption and Shape Transition in Neutral SnN Clusters with N≤40 Clusters: A Photodissociation Spectroscopy and Electric Beam Deflection Study, Phys. Chem. Chem. Phys. 24, 11616-11635 (2022) Link
20. M. Jäger, R. Schäfer, From Cd‐Rich to Se‐Rich ‐ The Manipulation of CdSe Nanocluster Structure and Optical Absorption, ChemPhysChem 22, 192-196 (2021) Link
19. M. Jäger, R. Schäfer, Variation of the Optical Properties with Size and Composition of Small, Isolated CdxSey+ Clusters, J. Comput. Chem., 42, 303–309 (2021) Link
18. A. Lehr, S. Gómez, M. A. Parkes, G. A. Worth, The Role of Vibronic Coupling in the Electronic Spectroscopy of Maleimide: A Multi-Mode and Multi-State Quantum Dynamics Study, Phys. Chem. Chem. Phys. 22, 25272 (2020) Link
17. A. Lehr, M. Jäger, M. Gleditzsch, F. Rivic, R. Schäfer, Optical Absorption of Atomically-Precise Sn14 Nanoclusters: The Antagonistic Interplay of Ligand-Stabilization, Molecular Symmetry and Solvatochromism, J. Phys. Chem. Lett. 11, 7827 (2020) Link
16. M. Jäger, J. Schneider, R. Schäfer, Size- and Charge-Dependent Optoelectronic Properties of CdSe Clusters: Evolution of the Optical Gap from Molecular to Bulk Behavior, J. Phys. Chem. A 124, 185 (2020) Link
15. A. Lehr, M. Jäger, R. Schäfer, Optical Properties of Sin+ (n=6–100) Clusters: The Approach to Bulk Behavior, J. Phys. Chem. C 124, 1070 (2020) Link
14. M. Jäger, R. Schäfer, R. L. Johnston, GIGA: a versatile genetic algorithm for free and supported clusters and nanoparticles in the presence of ligands, Nanoscale 11, 9042 (2019) Link
13. M. Jäger, A. Shayeghi, V. Klippenstein, R. L. Johnston, R. Schäfer Chemical bonding in initial building blocks of semiconductors: Geometrical structures and optical absorption spectra of isolated CdSe2+ and Cd2Se2+ species, J. Chem. Phys. 149, 244308 (2018) Link
12. M. Jäger, R. Schäfer, R. L. Johnston, First principles global optimization of metal clusters and nanoalloys, Adv. Phys. X 3, 1077 (2018) Link
11. A. Shayeghi, L. F. Pašteka, D. A. Götz, P. Schwerdtfeger, R. Schäfer Spin-orbit effects in optical spectra of gold-silver trimers, Phys. Chem. Chem. Phys. 20, 9108 (2018) Link
10. A. Shayeghi, S. Krähling, P. Hörtz R. L. Johnston, C. J. Heard, R. Schäfer Adsorption of Acetonitrile, Benzene, and Benzonitrile on Pt(111): Single Crystal Adsorption Calorimetry and Density Functional Theory, J. Phys. Chem. C 121, 21354 (2017) Link
9. C. Heard, A. Shayeghi, R. Schäfer, R. Johnston Charge and Compositional Effects on the 2D–3D Transition in Octameric AgAu Clusters, Z. Phys. Chem. 230, 955 (2016) Link
8. J. B. A. Davis, A. Shayeghi, S. L. Horswell, R. L. Johnston, The Birmingham parallel genetic algorithm and its application to the direct DFT global optimisation of IrN (N = 10–20) clusters, Nanoscale 7, 14032 (2015) Link
7. A. Shayeghi, R. L. Johnston, D. M. Rayner, R. Schäfer, A. Fielicke, The Nature of Bonding between Argon and Mixed Gold–Silver Trimers, Angew. Chem. Int. Ed. 54, 10675–10680 (2015) Link;
A. Shayeghi, R. L. Johnston, D. M. Rayner, R. Schäfer, A. Fielicke, Zum Charakter der chemischen Bindung von Argonatomen mit gemischten Gold/Silber-Trimeren, Angew. Chem. 127, (2015) Link
6. A. Shayeghi, R. Schäfer, D. M. Rayner, R. L. Johnston, A. Fielicke, Charge-induced dipole vs. relativistically enhanced covalent interactions in Ar-tagged Au-Ag tetramers and pentamers, J. Chem. Phys. 143, 024310 (2015) Link
5. A. Shayeghi, D. A. Götz, R.L. Johnston, R. Schäfer, Optical absorption spectra and structures of Ag6+ and Ag8+, Eur. Phys. J. D 69, 152 (2015) Link
4. A. Shayeghi, D. Götz, J.B.A. Davis, R. Schäfer, R.L. Johnston, Pool-BCGA: a parallelised generation-free genetic algorithm for the ab initio global optimisation of nanoalloy clusters, Phys. Chem. Chem. Phys. 17, 2104 (2015) Link
3. A. Shayeghi, R.L. Johnston, R. Schäfer, Communication: Global minimum search of Ag10+ with molecular beam optical spectroscopy, J. Chem. Phys. 141, 181104 (2014) Link
2. A. Shayeghi, C.J. Heard, R.L. Johnston, R. Schäfer, Optical and electronic properties of mixed Ag-Au tetramer cations, J. Chem. Phys. 140, 054312 (2014) Link
1. A. Shayeghi, R. L. Johnston, R. Schäfer, Evaluation of photodissociation spectroscopy as a structure elucidation tool for isolated clusters: a case study of Ag4+ and Au4+, Phys. Chem. Chem. Phys. 15, 197515 (2013) Link