کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1528874 1511987 2014 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Europium fluoride based luminescent materials: From hydrogels to porous cryogels, and crystalline NaEuF4 and EuF3 micro/nanostructures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Europium fluoride based luminescent materials: From hydrogels to porous cryogels, and crystalline NaEuF4 and EuF3 micro/nanostructures
چکیده انگلیسی


• Europium fluoride based hydrogels and cryogels are reported.
• Emission of Eu3+ ions is dependent on their existing states and the adopted fluorides (NaF or NH4F).
• The amorphous NaF- and NH4F-mediated cryogels show the strongest emission intensity.

Europium fluoride based hydrogels, porous cryogels, and crystalline NaEuF4 and EuF3 nanostructures were prepared by wet chemical route at room temperature by using NaF or NH4F as the reactants and gelation agents, in the absence of any other additives. The phase, morphology and thus resultant photoluminescence properties of luminescent products are demonstrated on the basis of the formation and evolution of europium fluoride complexes (EuF63−). The characteristic emission of Eu3+ ions is strongly dependent on their existing states and also the adopted fluorides (both cations and anions of NaF or NH4F). The amorphous NaF- and NH4F-mediated cryogels with highly porous structure and uniform distribution of optically active Eu3+ ions show much (one or two order) stronger luminescence intensity than their corresponding hydrogels and crystalline NaEuF4 and EuF3 nanostructures.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: B - Volume 179, January 2014, Pages 48–51
نویسندگان
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