Fig. 2From: Functionalized rare earth-doped nanoparticles for breast cancer nanodiagnostic using fluorescence and CT imagingSurface characterization of Gd2O3:Eu3+ nanoparticles. a FTIR spectra, b TGA curves of unmodified (N1-bare), APTMS coated (N2-APTMS), and folic acid-functionalized Gd2O3:Eu3+ nanoparticles (N3-FA); high-resolution C 1s XPS spectra of c N2-APTMS and d N3-FABack to article page