1. Departments of Bioengineering, Materials Science and Engineering and Beckman Institute University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
2. Departments of Diagnostic Radiology Nuclear Medicine and Pediatrics University of Maryland School of Medicine Baltimore MD 21201 USA
3. Department of Chemical and Biochemical Engineering University of Maryland Baltimore County Baltimore MD 21250 USA
4. Department of Nuclear Engineering and Materials Science and Engineering Huck Institutes for the Life Sciences The Pennsylvania State University University Park PA 16802 USA
5. Biomedical Engineering Department Jordan University of Science and Technology Irbid 22110 Jordan
6. Biomedical Technologies Group Microsystems and Nanotechnology Division Physical Measurement Laboratory National Institute of Standards and Technology Gaithersburg MD 20899 USA