کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7990392 | 1516127 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Magnetic-optical bifunctional properties of sub-20â¯nm β-NaYF4:Yb3+, Er3+ @NaGdF4 core-shell nanocrystals
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
In this work, the monodisperse spherical pure β-NaYF4:Yb3+,Er3+ core NCs with average size of 7.2â¯nm were synthesized by using NaOA as sodium source instead of the conventional NaOH, based on which the sub-20â¯nm β-NaYF4:Yb3+,Er3+@NaGdF4 core-shell NCs with magnetic-optical bifunctional properties were successfully obtained with seed-mediated growth method. The magnetization of the core-shell NCs enhanced proportionally with increased shell thickness, and the maximum upconversion intensity was three orders of magnitude increased in the 18.3â¯nm NaYF4: Yb3+,Er3+@NaGdF4 core-shell NCs compare with the corresponding core NCs. Besides, the upconversion mechanism for the core and core-shell NCs were discussed. This work may lead to an ideal platform for the preparation of sub-20â¯nm spherical NCs with magnetic and optical properties for application in biomedical imaging and drug delivery.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 767, 30 October 2018, Pages 775-781
Journal: Journal of Alloys and Compounds - Volume 767, 30 October 2018, Pages 775-781
نویسندگان
Ping Xiao, Song Ye, Huazhen Liao, Deping Wang,