1. Department of Chemical & Nuclear Engineering and Center for Microengineered Materials, MSC 01 1120, University of New Mexico, Albuquerque, New Mexico 87131-0001, United States
2. FEI Company, USA NanoPort, 5350 NE Dawson Creek Drive, Hillsboro, Oregon
97124, United States
3. Division
of Chemical Physics,
Department of Applied Physics, and Competence Center for Catalysis, Chalmers University of Technology, 412 96 Göteborg,
Sweden
4. Center for Electron
Nanoscopy, Technical University of Denmark, DK-2800 Kgs. Lyngby,
Denmark