1. Department of Oral Biology The Maurice and Gabriela Goldschleger School of Dental Medicine Faculty of Medicine and The Center for Nanoscience and Nanotechnology Tel Aviv University Tel Aviv 6997801 Israel
2. Department of Chemistry International Institute for Nanotechnology Simpson‐Querrey Institute Chemistry of Life Processes Institute Northwestern University Evanston IL 60208 USA
3. Department of Periodontology The Maurice and Gabriela Goldschleger School of Dental Medicine Faculty of Medicine Tel Aviv University Tel Aviv 6997801 Israel
4. Department of Materials Science & Engineering Department of Biomedical Engineering Department of Pharmacology Northwestern University Evanston IL 60208 USA
5. Department of Endodontology The Maurice and Gabriela Goldschleger School of Dental Medicine Faculty of Medicine Tel Aviv University Tel Aviv 6997801 Israel