1. Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland.
2. Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland.
3. Laboratory of Biosensors and Bioelectronics, Department of Information Technology and Electrical Engineering, ETHZurich, 8093 Zurich, Switzerland.