1. Institute of Physical Chemistry, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany
2. The Hamburg Centre for Ultrafast Imaging, CUI-AIM, Luruper Chaussee 149, 22761 Hamburg, Germany
3. Engineering Research Center in Biomaterials, Sichuan University, Chengdu, 610065, P. R. China
4. Department of Chemistry & Zukunftskolleg, University of Konstanz, Universitätsstraße 10, 78457 Konstanz, Germany