1. Electron Microscopy Facility, Institute for Functional Materials and Devices, Lehigh University , Bethlehem, PA , United States
2. Advanced Imaging and Microscope Laboratory, Maryland Nano Center, Institute for Research in Electronics and Applied Physics, University of Maryland, College Park , MD , United States
3. Material Measurement Laboratory, National Institute of Standards and Technology , Gaithersburg, MD , United States
4. Electron Microscopy Center, Indiana University Bloomington , Bloomington, IN , United States
5. Texas Materials Institute, University of Texas at Austin , Austin, Texas , United States
6. Department of Materials and Mineral Resources Engineering, National Taipei University of Technology , Taipei , Taiwan