1. Department of Physics Susquehanna University 514 University Ave. Selinsgrove PA 17870 USA
2. Department of Bioengineering Lehigh University 111 Research Drive Bethlehem PA 18015 USA
3. National Institute of Standards and Technology 1000 Bureau Drive, M/S 8542 Gaithersburg MD 20899 USA
4. Department of Nanoscience Joint School of Nanoscience and Nanoengineering University of North Carolina at Greensboro 2907 East Gate City Blvd. Greensboro NC 27401 USA
5. Department of Engineering Science and Mechanics Materials Research Institute The Pennsylvania State University N‐332 Millennium Science Complex University Park PA 16802 USA
6. Department of Materials Science and Engineering Department of Bioengineering Lehigh University 5 E. Packer Ave. Bethlehem PA 18015 USA