1. Department of Materials Science and Engineering, University of Maryland, College Park, Maryland, United States
2. T. C. Jenkins Department of Biophysics, Johns Hopkins University, Baltimore, Maryland, United States
3. NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland, United States
4. Chemical Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, United States
5. Department of Chemistry, University of Tennessee, Knoxville, Tennessee, United States