1 Physics Department E20, Technical University of Munich, James-Franck-Str. 1, 85748, Garching, Germany. a.riss@tum.de.
2 Department for Molecular Functional Materials, Center for Advancing Electronics Dresden (cfaed), Faculty of Chemistry and Food Chemistry, Dresden University of Technology, Mommsenstr. 4, 01062, Dresden, Germany.
3 School of Physical Sciences and Nanotechnology, Yachay Tech University, 100119, Urcuquí, Ecuador.
4 Chemistry Department, College of Science, United Arab Emirates University (UAEU), P.O. Box 15551, Al Ain, United Arab Emirates.
5 Nano-Bio Spectroscopy Gr oup and ETSF, Universidad del País Vasco, 20018, San Sebastián, Spain.
6 Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany.
7 State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, 300071, Tianjin, China.
8 Physics Department E20, Technical University of Munich, James-Franck-Str. 1, 85748, Garching, Germany.
9 Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), 28049, Madrid, Spain.
10 Max Planck Institute for the Structure and Dynamics of Matter, Luruper Chaussee 149, 22761, Hamburg, Germany.
11 Center for Free-Electron Laser Science and Department of Physics, University of Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany.
12 Organic and Carbon Nanomaterials Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Kunigami, Okinawa, 904-0495, Japan.
13 Institute of Physical Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, D-55128, Mainz, Germany.
14 Physics Department E20, Technical University of Munich, James-Franck-Str. 1, 85748, Garching, Germany. palma@iphy.ac.cn.
15 Institute of Physics, Chinese Academy of Sciences, 100190, Beijing, China. palma@iphy.ac.cn.