1. Karlsruhe Institute of Technology Institute of Microstructure Technology Hermann‐von‐Helmholtz‐Platz 1 76344 Eggenstein‐Leopoldshafen Germany
2. Institute of Printing Science and Technology Technische Universität Darmstadt Magdalenenstr. 2 64289 Darmstadt Germany
3. Department of Biomolecular Systems Max Planck Institute of Colloids and Interfaces Am Mühlenberg 1 14476 Potsdam Germany