1. Technical and Macromolecular Chemistry Paderborn University Warburger Strasse 100 33098 Paderborn Germany
2. Biohybrid Materials Department of Bioproducts and Biosystems Aalto University P. O. Box 16100 00076 Aalto Finland
3. HYBER Centre Department of Applied Physics Aalto University P. O. Box 15100 00076 Aalto Finland