کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1644850 1517274 2014 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Facile one-pot synthesis of hydrophilic NaYF4:Yb,Er@NaYF4:Yb active-core/active-shell nanoparticles with enhanced upconversion luminescence
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Facile one-pot synthesis of hydrophilic NaYF4:Yb,Er@NaYF4:Yb active-core/active-shell nanoparticles with enhanced upconversion luminescence
چکیده انگلیسی


• NaYF4:Yb,Er/NaYF4:Yb nanoparticles were prepared by a facile one-pot synthesis strategy.
• They are hydrophilic due to the presence of PVP ligands.
• They exhibit greatly enhanced up-converting luminescence.

We report a facile one-pot synthesis strategy for hydrophilic NaYF4:Yb,Er@NaYF4:Yb active-core/active-shell nanoparticles by two-step injection of ethylene glycol (EG) solution containing different rare earth ions, BF4−, Na+ and Poly(vinylpyrrolidone) (PVP) into EG at 180 °C. NaYF4:Yb,Er@NaYF4:Yb nanoparticles have the size of about 100 nm and cubic-phase structure. The presence of PVP ligands on their surface confers high solubility in water. The aqueous dispersion of these NaYF4:Yb,Er@NaYF4:Yb nanoparticles exhibits greatly enhanced up-converting luminescence, compared with that of NaYF4:Yb,Er core-only nanoparticles and NaYF4:Yb,Er@NaYF4 active-core/inert-shell nanoparticles. Therefore, these hydrophilic NaYF4:Yb,Er@NaYF4:Yb nanoparticles have great superiority as luminescent labeling materials for biological applications.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 114, 1 January 2014, Pages 80–83
نویسندگان
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