1. Institute for Biomechanics, ETH Zurich Gloriastrasse 39 8092 Zurich Switzerland
2. Institute for Chemical and Bioengineering, ETH Zurich Vladimir-Prelog-Weg 1–5/10 8093 Zurich Switzerland
3. School of Materials and Energy Guangdong University of Technology Guangzhou, Guangdong 510006 China