1. Laboratoire de Physique de Solides, UMR 8502, Bât. 510, Université Paris-Sud,
F-91405 Orsay, France
2. Université de Lorraine, SRSMC, UMR 7565, 54506 Vandoeuvre-lès-Nancy
Cedex, France
3. CNRS UMR 7565, 54506 Vandoeuvre-lès-Nancy Cedex,
France
4. iNANO Interdisciplinary
Nanoscience
Center and Department of Chemistry, Aarhus University, DK-8000 Aarhus, Denmark
5. SWING, Synchrotron Soleil, BP 48, F-91192 Gif-sur-Yvette, France