Figure 3
FT-IR spectra of the UCNPs@SiO2 (a), UCNPs@SiO2-MPS (b) and UCNPs@SiO2@PMAA (c). The inset shows enlargement of the selected IR absorption bands in the range from 1600 to 1800 cm−1.
Figure 3 | Scientific Reports
FT-IR spectra of the UCNPs@SiO2 (a), UCNPs@SiO2-MPS (b) and UCNPs@SiO2@PMAA (c). The inset shows enlargement of the selected IR absorption bands in the range from 1600 to 1800 cm−1.
