1. Silklab, Department of Biomedical Engineering Tufts University 200 Boston Avenue, Suite 4875 Medford MA 02155 USA
2. Dipartimento di Chimica Università degli Studi di Bari Aldo Moro via Orabona 4 Bari 70126 Italy
3. Laboratory for Living Devices Tufts University Medford MA 02155 USA
4. Department of Electrical and Computer Engineering Tufts University Medford MA 02155 USA
5. Department of Physics Tufts University Medford MA 02155 USA