1. Laboratory
for Nanoscale Materials Science, Swiss Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland
2. Group
for Molecular Engineering of Functional Materials, Institute of Chemical
Science and Engineering, École Polytechnique Fédérale de Lausanne, CH-1950 Sion, Switzerland
3. Adolphe
Merkle Institute, University of Fribourg, CH-1700 Fribourg, Switzerland