1. Fondazione Bruno Kessler
2. Centre for Materials and Microsystems
3. Micro Nano Facility
4. 38123 Trento
5. Italy
6. NEST
7. Scuola Normale Superiore and Istituto Nanoscienze-CNR
8. 56127 Pisa
9. Helmholtz-Zentrum Dresden-Rossendorf
10. Institute of Ion Beam Physics and Materials Research
11. 01328 Dresden
12. Germany