1. Department of Materials, ETH Zürich, Wolfgang-Pauli-Str. 10, CH-8093 Zürich, Switzerland
2. Department of Chemistry and Applied Biosciences, ETH Zürich, Wolfgang-Pauli-Str. 10, CH-8093 Zürich, Switzerland
3. Department of Biology, ETH Zürich, Schafmattstrasse 20, CH-8093 Zürich, Switzerland