1. Institute of Inorganic and Physical Chemistry, Technische Universität Darmstadt, Alarich-Weiss-Straße 8, D-64287 Darmstadt, Germany
2. Physical Chemistry of Nanomaterials, Center for Interdisciplinary Nanostructure Science and Technology, Universität Kassel, Heinrich-Plett Straße 40, D-34132 Kassel, Germany
3. German Research Center for Environmental Health (HMGU), Helmholtz Zentrum München, Ingolstädter Landstraße 1, D-85764 Neuherberg, Germany
4. Bruker France SAS, 34 rue de l’industrie, F-67160 Wissembourg, France