1. Chair of Biogenic Functional Materials, 6 Technical University of Munich, Schulgasse, 22, Straubing 94315, Germany
2. Department of Bioproducts and Biosystems, Aalto University, 00076 Aalto, Finland
3. Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, Espoo FI-02150, Finland