Figure 5From: Studies on Preparation of Photosensitizer Loaded Magnetic Silica Nanoparticles and Their Anti-Tumor Effects for Targeting Photodynamic TherapyFT-IR spectra of (a) PHPP, (b) (Fe3O4/OA)/SiO2, and (c) (PHPP-Fe3O4/OA)/SiO2Back to article page