| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1617249 | Journal of Alloys and Compounds | 2011 | 5 Pages |
A facile direct precipitation method has been developed for the synthesis of bifunctional magnetic–luminescent nanocomposites with Fe3O4 nanoparticles as the core and YVO4:Eu3+ as the shell. Transmission electron microscopy (TEM) images revealed that the obtained bifunctional nanocomposites had a core–shell structure and a spherical morphology. The average size was ∼150 nm, and the thickness of the shell was ∼15 nm. The X-ray diffraction (XRD) patterns showed that a cubic spinel structure of Fe3O4 core and a tetragonal phase of YVO4 shell were obtained. Fourier transform infrared (FT-IR) spectra confirmed that the YVO4:Eu3+ had been successfully deposited on the surface of Fe3O4 nanoparticles. Photoluminescence (PL) spectra indicated that the nanocomposites displayed a strong red characteristic emission of Eu3+. Magnetic measurements showed that the obtained bifunctional nanocomposites exhibited superparamagnetic behavior at room temperature. Therefore, the bifunctional nanocomposites are expected to develop many potential applications in biomedical fields.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Bifunctional magnetic-luminescent nanocomposites with Fe3O4 nanoparticles as the core and YVO4:Eu3+ as the shell. ► A cubic spinel structrue of Fe3O4 core and a tetragonal phase of YVO4 shell were obtained. ► The nanocomposites displayed a strong red emission and superparamagnetic behavior at room temperature.
