1. Paul Scherrer Institute, Laboratory for Micro and Nanotechnology, 5232 Villigen PSI, Switzerland
2. Paul Scherrer Institute, Laboratory for Micro and Nanotechnology, 5232 Villigen PSI, SwitzerlandbUniversity of Bern, Gerontechnology and Rehabilitation Group, 3010 Bern, Switzerland
3. University of Applied Sciences and Arts, Institute of Polymer Engineering, 5210 Windisch, Switzerland
4. Paul Scherrer Institute, Laboratory for Micro and Nanotechnology, 5232 Villigen PSI, SwitzerlandcUniversity of Applied Sciences and Arts, Institute of Polymer Engineering, 5210 Windisch, Switzerland