1 University of Regensburg, Institute of Analytical Chemistry, Chemo- and Biosensors, Universitätsstrasse 31, 93053, Regensburg, Germany.
2 University of Regensburg, Institute of Analytical Chemistry, Chemo- and Biosensors, Universitätsstrasse 31, 93053, Regensburg, Germany. antje.baeumner@ur.de.
3 Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY, 14853, USA. antje.baeumner@ur.de.