Figure 3

(a) FTIR spectra of annealed SiO2:Eu, SiO2:Eu-NH2 and SiO2:Eu-COOH functionalised nanoparticles (b) TGA curves of annealed SiO2:Eu, SiO2:Eu-NH2 and SiO2:Eu-COOH functionalised nanoparticles.

(a) FTIR spectra of annealed SiO2:Eu, SiO2:Eu-NH2 and SiO2:Eu-COOH functionalised nanoparticles (b) TGA curves of annealed SiO2:Eu, SiO2:Eu-NH2 and SiO2:Eu-COOH functionalised nanoparticles.