Folic Acid-Conjugated Silica-Modified TbPO₄·H₂O Nanorods for Biomedical Applications

Figure 6

Photoluminescence spectra of the TbPO₄·H₂O samples with various molar ratios of Tb³⁺/PO₄^3-: 1/15 (1); 1/10 (2); 1/5 (3); and 1/1(4).