Publikationsdatum:
2019
Beschreibung:
〈p〉Publication date: 15 July 2019〈/p〉
〈p〉〈b〉Source:〈/b〉 Materials Letters, Volume 247〈/p〉
〈p〉Author(s): Xie Li, Hui Wang, Tingting Wang, Lin Wang, Xufeng Liu, Xiaodong Zhu〈/p〉
〈div xml:lang="en"〉
〈h5〉Abstract〈/h5〉
〈div〉〈p〉In this paper, NaYF〈sub〉4〈/sub〉:Yb, Er nanoparticles (NPs) were coated with hydrophilic- polystyrene (HPS) by in situ polymerization. The morphologies, structures, as well as hydrophilic stabilities of the NaYF〈sub〉4〈/sub〉: Yb, Er NPs and the NaYF〈sub〉4〈/sub〉: Yb, Er /HPS NPs composite were characterized by Transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FT-IR), Thermogravimetric analysis (TGA) and up-conversion photoluminescence spectrometry. TEM results shows that the HPS-encapsulated NaYF〈sub〉4〈/sub〉:Yb, Er NPs are well dispersed and spherical in shape in water phase, the size of spherical particles was estimated to be 140 nm, FT-IR and TGA results revealed that these NPs were coated with HPS. Meanwhile, Fluorescence tests showed that after HPS coated, the fluorescent position and intensity of NPs did not changed significantly. Settlement test results revealed that HPS coated NaYF〈sub〉4〈/sub〉:Yb, Er NPs had more dispersion and stability than uncoated ones in aqueous system.〈/p〉〈/div〉
〈/div〉
〈div xml:lang="en"〉
〈h5〉Graphical abstract〈/h5〉
〈div〉〈p〉〈figure〉〈img src="https://ars.els-cdn.com/content/image/1-s2.0-S0167577X19305063-ga1.jpg" width="500" alt="Graphical abstract for this article" title=""〉〈/figure〉〈/p〉〈/div〉
〈/div〉
Print ISSN:
0167-577X
Digitale ISSN:
1873-4979
Thema:
Chemie und Pharmazie
,
Maschinenbau
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