| Synthesis and characterization of ultra-fine Y2O3:Eu3+ nanophosphors for luminescent security ink applications. | |
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MedLine Citation:
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PMID: 20051611 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We report a simple method for the synthesis of ultra-fine Eu(3+)-doped yttria (Y(2)O(3)) nanophosphors with an average diameter of approximately 5 nm for development of a transparent colloid that could be used as a luminescent security ink. This has been achieved by suitably substituting Eu(3+) ions at the favorable C(2) symmetry sites of Y(3+) ions and quantum mechanically confining the growth of the nanophosphor using a novel acid-catalyzed sol-gel technique. This is one of the few reports that depict the development of a transparent aqueous-stable Y(2)O(3):Eu(3+) colloidal solution for strategic applications related to security codes. High resolution transmission electron microscopy images showed excellent lattice fringes that in turn support the presence of better crystal quality and enhanced photoluminescence (PL) emission from the Y(1.9)O(3)Eu(0.1)(3+) nanophosphor system. Time resolved emission spectroscopy measurement indicated a PL decay time in the range of a few milliseconds, suitable for making luminescent security ink and other advanced applications in optoelectronic devices and bio-labeling. |
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Authors:
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Bipin Kumar Gupta; D Haranath; Shikha Saini; V N Singh; V Shanker |
Publication Detail:
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Type: Journal Article Date: 2010-01-06 |
Journal Detail:
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Title: Nanotechnology Volume: 21 ISSN: 1361-6528 ISO Abbreviation: Nanotechnology Publication Date: 2010 Feb |
Date Detail:
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Created Date: 2010-01-06 Completed Date: 2010-03-22 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101241272 Medline TA: Nanotechnology Country: England |
Other Details:
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Languages: eng Pagination: 055607 Citation Subset: IM |
Affiliation:
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National Physical Laboratory, Council of Scientific and Industrial Research, Dr K S Krishnan Road, New Delhi-110 012, India. bipinbhu@yahoo.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Europium
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chemistry* Ink* Luminescent Agents / chemistry* Metal Nanoparticles / chemistry* Microscopy, Electron, Scanning Microscopy, Electron, Transmission Security Measures Temperature X-Ray Diffraction Yttrium / chemistry* |
| Chemical | |
Reg. No./Substance:
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0/Luminescent Agents; 1314-36-9/yttria; 7440-53-1/Europium; 7440-65-5/Yttrium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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