1. Materials Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
2. Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
3. Maryland NanoCenter, University of Maryland, College Park, Maryland 20742, United States
4. Harwell Science and Innovation Campus, Diamond Light Source, Ltd., Didcot OX11 0DE, United Kingdom