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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
2
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pubmed:dateCreated |
2007-4-24
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pubmed:abstractText |
YBO3 : Eu3+ nanocrystals (NCs) were prepared by a hydrothermal method and characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and Fourier-transform infrared (FTIR) spectroscopy. The results demonstrate that morphology and structure of the NCs varied strongly with hydrothermal temperature. Their luminescent properties were investigated in comparison to the bulk. A large number of NO3- groups were adsorbed at the surface of hydrothermal products, which acted as luminescent killers; Two symmetry sites of Eu3+ ions in NCs, the interior and the surface sites, were identified by the site-selective excitation and time-resolved emission experiments; The intensity ratio of 5D0-7F2 to 5D0-7F, of EU3+ at the surface site increased greatly than that at the interior site; as a result, the chromaticity was improved; The total radiative transition rate of 5D0-sigmaJ7FJ for Eu3+ at the surface site was 3-5 times larger than that at the interior.
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pubmed:language |
eng
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pubmed:journal |
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pubmed:citationSubset |
IM
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pubmed:chemical |
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pubmed:status |
MEDLINE
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pubmed:month |
Feb
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pubmed:issn |
1533-4880
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pubmed:author |
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pubmed:issnType |
Print
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pubmed:volume |
7
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
593-601
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pubmed:dateRevised |
2008-11-21
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pubmed:meshHeading |
pubmed-meshheading:17450801-Borates,
pubmed-meshheading:17450801-Calcium Compounds,
pubmed-meshheading:17450801-Crystallization,
pubmed-meshheading:17450801-Europium,
pubmed-meshheading:17450801-Hot Temperature,
pubmed-meshheading:17450801-Light,
pubmed-meshheading:17450801-Luminescence,
pubmed-meshheading:17450801-Luminescent Measurements,
pubmed-meshheading:17450801-Microscopy, Electron, Scanning,
pubmed-meshheading:17450801-Nanoparticles,
pubmed-meshheading:17450801-Nanotechnology,
pubmed-meshheading:17450801-Particle Size,
pubmed-meshheading:17450801-Photochemistry,
pubmed-meshheading:17450801-Powders,
pubmed-meshheading:17450801-Spectroscopy, Fourier Transform Infrared,
pubmed-meshheading:17450801-Thermogravimetry,
pubmed-meshheading:17450801-Tungsten Compounds,
pubmed-meshheading:17450801-X-Ray Diffraction,
pubmed-meshheading:17450801-Yttrium
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pubmed:year |
2007
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pubmed:articleTitle |
Structure and photoluminescent properties of microstructural YBO3 : Eu3+ nanocrystals.
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pubmed:affiliation |
Key Laboratory of Excited State Physics Changchun Institute of Optics, Fine Mechanics and Physics Chinese Academy of Sciences, Changchun 130033, P. R. China.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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