1. Department of ChemistryBoston University Boston MA 02215 USA
2. Department of Comparative PathobiologyCollege of Veterinary MedicinePurdue University West Lafayette IN 47907 USA
3. Prof. J.‐X. Cheng, Department of Electrical and Computer EngineeringBoston University Boston MA 02215 USA
4. Wellman Center for PhotomedicineMassachusetts General HospitalHarvard Medical School MA 02114 USA
5. State Key Laboratory of Supramolecular Structure and MaterialsInstitute of Theoretical ChemistryJilin University Changchun 130012 China
6. Department of Biomedical EngineeringBoston University Boston MA 02215 USA
7. Photonics CenterBoston University Boston MA 02215 USA