1. Department of Oral Health SciencesTemple University Philadelphia PA 19140 USA
2. Bioengineering DepartmentTemple University Philadelphia PA 19140 USA
3. Department of Mechanical EngineeringJohns Hopkins University Baltimore MD 21218 USA
4. Hopkins Extreme Materials InstituteJohns Hopkins University Baltimore MD 21218 USA
5. Department of Chemical & Biomolecular EngineeringJohns Hopkins University Baltimore MD 21218 USA
6. Institute for NanoBioTechnologyJohns Hopkins University Baltimore MD 21218 USA