1. Experimental Continuum Mechanics Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Zurich 8092, Switzerland.
2. EMPA, Swiss Federal Laboratories for Material Science and Technologies, Überlandstrasse 129, Dübendorf 8600, Switzerland.
3. Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland.
4. Laboratory of Thermodynamics in Emerging Technologies, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, Zurich CH-8092, Switzerland.
5. NEST, Istituto Nanoscienze CNR and Scuola Normale Superiore, Pisa 56127, Italy.