1. Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
2. Department of Electrical and Computer Engineering, University of Minnesota, 200 Union St. SE, Minneapolis, Minnesota 55455, United States
3. College of Science and Engineering Characterization Facility, Shepherd Laboratory, University of Minnesota, 100 Union St SE, Minneapolis, Minnesota 55455, United States
4. Components Research, Intel Corporation, Hillsboro, Oregon 97124, United States