1. Laboratory of Intelligent Systems; Institute of Microengineering; School of Engineering; École Polytechnique Fédérale de Lausanne (EPFL); 1015 Lausanne Switzerland
2. Soft Transducers Laboratory; Institute of Microengineering; School of Engineering; École Polytechnique Fédérale de Lausanne (EPFL); Rue de la Maladière 71b 2000 Neuchâtel Switzerland