Abstract
CeF3:Tb3+ nanoparticles (short pillar-like morphology with an average length and widthof 11 and 5 nm, respectively) were successfully prepared by a polyol processusing diethyleneglycol (DEG) as solvent. After being functionalized with aSiO2–NH2 layer,these CeF3:Tb3+ nanoparticles can be conjugated with biotin molecules (activatedby thionyl chloride) and further with avidin. The as-formedCeF3:Tb3+ nanoparticles, CeF3:Tb3+ nanoparticles functionalized with amino groups, biotin conjugated amino-functionalizedCeF3:Tb3+ nanoparticlesand biotinylated CeF3:Tb3+ nanoparticles bonded with avidin were characterized by x-ray diffraction (XRD),transmission electron microscopy (TEM), Fourier transform infrared (FT-IR), UV/visabsorption spectra and luminescence spectra, respectively. The biofunctionalization of theCeF3:Tb3+ nanoparticles has less effect on their luminescence properties, i.e. they still show strong green emission(from Tb3+, with 5D4–7F5 at 543 nm as the most prominent group), indicative of the great potential for theseCeF3:Tb3+ nanoparticles to be used as biological fluorescence probes.
Published Version
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