1. Institute
for Physical and Theoretical Chemistry, Braunschweig Integrated Centre
of Systems Biology (BRICS), and Laboratory for Emerging Nanometrology
(LENA), Braunschweig University of Technology, 38106 Braunschweig, Germany
2. Institute
of Physics, Faculty of Physics, Astronomy, and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Torun, Poland