1. Institute for Bioprocessing and Analytical Measurement Techniques (iba), 37308Heiligenstadt, Germany
2. Department of Infection Biology, Leibniz Institute for Natural Product Research and Infection Biology, 07745Jena, Germany
3. Institute of Nanotechnology (INT) and Karlsruhe Nano Micro Facility, Karlsruhe Institute of Technology, 76131Karlsruhe, Germany
4. Institute for Chemistry and Biotechnology, Faculty of Mathematics and Natural Sciences, Technische Universität Ilmenau, 98694Ilmenau, Germany
5. nanoPET GmbH, Luisencarée, Robert-Koch-Platz 4, 10115Berlin, Germany