1. Department of Civil & Environmental Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
2. Center for the Environmental Implications of NanoTechnology (CEINT), Duke University, Durham, North Carolina 27708, United States
3. Department of Geological & Environmental Sciences, Stanford University, Stanford, California 94305, United States
4. Stanford Synchrotron
Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
5. Department of Photon
Science, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States