1. Center for Integrated Nanotechnologies (CINT), Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
2. Nuclear Materials Science Group (MST-16), Materials and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
3. National Center for Electron Microscopy (NCEM), The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
4. Physics and Chemistry of Materials Group (T-1), Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
5. Electrochemistry and Corrosion Team, Sigma Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
6. Department of Electrical & Computer Engineering, Seoul National University, Seoul 08826, Republic of Korea