کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1314598 | 975977 | 2008 | 4 صفحه PDF | دانلود رایگان |

YF3:Eu3+ nanobundles were synthesized by a facile microemulsion method. Analysis of X-ray diffraction, scanning electron microscope, and transmission electron microscopy reveals that each nanobundle consists of numerous nanowhiskers with a mean length of ∼500 nm and a mean diameter of ∼2 nm. Under 393-nm excitation, the luminescence was dominated by 5D0 → 7F1 transition, indicating the inversion symmetry of Eu3+ site. The luminescence intensity increased with increasing Eu3+ concentration, up to about 30 mol%, and then decreased abruptly. The peak positions and spectral shapes of emissions were independent of Eu3+ concentration. Finally, the critical distance of energy transfer was calculated.
(a) SEM image of YF3:Eu3+(5%) nanobundles. (b) TEM image of nanobundles. (c) A crossed nanobundle; Inset: electron diffraction patterns.Figure optionsDownload as PowerPoint slide
Journal: Journal of Fluorine Chemistry - Volume 129, Issue 7, July 2008, Pages 621–624