کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1493888 1510790 2015 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Bifunctional NaGdF4:Yb, Er, Fe nanocrystals with the enhanced upconversion fluorescence
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Bifunctional NaGdF4:Yb, Er, Fe nanocrystals with the enhanced upconversion fluorescence
چکیده انگلیسی


• NaGdF4:Yb, Er, Fe nanocrystals were synthesized by a facile hydrothermal method.
• The luminescence intensity can be improved greatly by Fe3+ doping.
• Fe3+ can enter crystal sites interstitially and substitutionally.
• These nanocrystals exhibit paramagnetic properties.

NaGdF4:Yb, Er nanocrystals doped with Fe3+ were synthesized by a facile hydrothermal method. The upconversion emissions in a broad range from 200 to 700 nm were measured under 980 nm laser excitation. The luminescence intensity can be improved greatly by Fe3+ doping. In addition to the typical upconversion emission of Er3+ ions, the violet emission from Gd3+ is explained by the energy transfer from Er3+ to Gd3+. Powder X-ray diffraction patterns reveal that Fe3+ can enter crystal sites interstitially and substitutionally. The effects of Fe3+ doping on morphology, crystal growth and emission properties of particles are discussed in detailed. Furthermore, these nanocrystals exhibit paramagnetic properties and have the potential applications in bimodal bioimaging in virtue of their upconversion luminescent and paramagnetic properties.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 44, June 2015, Pages 13–17
نویسندگان
, , , , , , ,