1. Institute
of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
2. Institute
of Physics, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
3. Swiss-Norwegian Beamlines at ESRF, 6
rue Jules Horowitz, 38043 Grenoble Cedex, France