1. Materials & Nanotechnology Program, North Dakota State University, Fargo, North Dakota 58108, United States
2. National Institute of Standards & Technology, Gaithersburg, Maryland 20899, United States
3. Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
4. Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
5. Department of Physics, North Dakota State University, Fargo, North Dakota 58108, United States
6. Department of Chemistry & Biochemistry, North Dakota State University, Fargo, North Dakota 58108, United States
7. Department of Coatings & Polymeric Materials, North Dakota State University, Fargo, North Dakota 58108, United States