| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1617075 | Journal of Alloys and Compounds | 2011 | 5 Pages |
A series of monodisperse ultrasmall Ba2YbF7 nanocrystals with intense upconversion emission were synthesized via a facile solvothermal method by using oleic acid as capping ligands. X-ray diffraction (XRD) and transmission electron microscopy (TEM) assays revealed that the as-synthesized Ba2YbF7 nanocrystals are of cubic structure, rather than the reported tetragonal structure. The cell parameter of the particles is 5.918 Å. The Er3+ or Tm3+ doped Ba2YbF7 nanocrystals with the size of sub-10 nm can give an intense upconversion emission under the 980 nm laser excitation and the upconversion processes were discussed. The Ba2YbF7 nanocrystals show a potential application as a bioimaging agent.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Monodisperse Ba2YbF7 nanocrystals of sub-10 nm were synthesized via solvothermal method. ► Ba2YbF7 nanocrystals are of cubic structure instead of tetragonal structure. ► Intense upconversion was obtained in Er3+ or Tm3+ Ba2YbF7 nanocrystals.
