1. NanoSYD, University of Southern Denmark, Alsion 2, 6400-Sønderborg, Denmark
2. National Center
for Electron Microscopy, The Molecular Foundry, LBNL, Berkeley, California 94720, United States
3. Sorbonne Universités,
UPMC Univ Paris 06, CNRS UMR 7197, Laboratoire de Réactivité
de Surface (LRS), 4 place Jussieu, 75005 Paris, France
4. Sorbonne
Universités,
UPMC Univ Paris 06, UMR CNRS 7588, Institut des Nanosciences de Paris
(INSP), 4 place Jussieu, 75005 Paris, France