1. Paul Scherrer Institut, Forschungsstrasse 111, 5232 Villigen, Switzerland
2. Sefar AG, Hinterbissaustrasse 12, 9410 Heiden, Switzerland
3. Swiss Light Source Paul Scherrer Institut, 5232 Villigen, Switzerland
4. Laboratory of Physical Chemistry, ETH Zürich, Vladimir-Prelog-Weg 1-5/10, 8093 Zürich, Switzerland