Figure 8.

Drug release and PL properties of ibuprofen-loaded Eu³⁺:ACP porous nanospheres: (a) The drug release curve in SBF of a disk composed of ibuprofen-loaded Eu³⁺:ACP porous nanospheres, and the inset shows the cumulative drug release percentage versus natural logarithm of release time; (b) XRD pattern of the Eu³⁺:ACP porous nanosphere drug delivery system after drug release in SBF; and (c) room-temperature PL emission spectra of the drug loaded Eu³⁺:ACP porous nanospheres before and after drug release.