Affiliation: | 1. National Institute of Standards and Technology (NIST), Materials Science and Engineering Division, Gaithersburg, MD, USA;2. Towson University, Department of Physics, Astronomy and Geosciences, Towson, MD, USA;3. Los Alamos National Laboratory, Center for Integrated Nanotechnologies, Los Alamos, NM, USA;4. National Institute of Standards and Technology, Semiconductor and Dimensional Metrology Division, Gaithersburg, MD, USA |