1. Department of Biomechanical Engineering University of Twente Enschede 7522 NB The Netherlands
2. Institute of Systems and Robotics University of Coimbra Coimbra 3030‐194 Portugal
3. Department of Physics The German University in Cairo Cairo 11835 Egypt
4. Institute of Bioengineering of Catalonia Smart Nanobiodevices group Barcelona 08028 Spain