| Up-Conversion Luminescence of the NaRF(4)-NaR'F (4) (R: Y, Yb, Er) Core-Shell Nanomaterials. | |
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MedLine Citation:
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PMID: 20455014 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Up-converting NaRF(4)-NaR'F(4) (R: Y, Yb, Er) nanomaterials with different core-shell combinations were prepared with the co-precipitation method. The X-ray powder diffraction (XPD) measurements revealed the presence of both the cubic and hexagonal NaRF(4) phases. The crystallite sizes calculated with the Scherrer formula were 100 and 150 nm for the cubic and hexagonal phases, respectively. The FT-IR spectra showed water impurities. The up-conversion luminescence and luminescence decays were studied with NIR laser excitation at 970 nm. The up-conversion luminescence spectra showed strong red (640-685 nm) ((4)F(9/2) → (4)I(15/2)) and moderate green (515-560 nm) ((2)H(11/2,) (4)S(3/2) → (4)I(15/2)) Er(3+) luminescence. The strongest up-conversion luminescence and longest red luminescence decay was obtained from the Na(Y,Yb)F(4)-NaErF(4) core-shell combination. |
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Authors:
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Iko Hyppänen; Jorma Hölsä; Jouko Kankare; Mika Lastusaari; Laura Pihlgren; Tero Soukka |
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Publication Detail:
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Type: Journal Article Date: 2010-05-09 |
Journal Detail:
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Title: Journal of fluorescence Volume: 21 ISSN: 1573-4994 ISO Abbreviation: J Fluoresc Publication Date: 2011 May |
Date Detail:
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Created Date: 2011-06-23 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9201341 Medline TA: J Fluoresc Country: Netherlands |
Other Details:
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Languages: eng Pagination: 963-9 Citation Subset: IM |
Affiliation:
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Department of Chemistry, University of Turku, FI-20014, Turku, Finland. |
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