[1] CNRS, Lab Mat & Syst Complexes MSC, UMR 7057, F-75205 Paris 13, France
[2] Univ Paris Diderot, F-75205 Paris 13, France
[3] McMaster Univ, Dept Mat Sci & Engn, Hamilton, ON L8S 4M1, Canada
[4] McMaster Univ, Canadian Ctr Elect Microscopy, Hamilton, ON L8S 4M1, Canada
[5] UPMC, CNRS, IMPMC, UMR 7590, F-75005 Paris, France
[6] Univ Paris 06, Sorbonne Univ, CNRS, PHENIX,UMR 8234, F-75252 Paris, France