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|a (TOE)ost1532207
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|a Precise Tuning of Surface Quenching for Luminescence Enhancement in Core?Shell Lanthanide-Doped Nanocrystals
|h [electronic resource]
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|a Berkeley, Calif. :
|b Lawrence Berkeley National Laboratory ;
|a Oak Ridge, Tenn. :
|b Distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
|c 2016.
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|a Size: p. 7241-7247 :
|b digital, PDF file.
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|a text
|b txt
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|a online resource
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|a Published through Scitech Connect.
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|a 10/11/2016.
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|a "Journal ID: ISSN 1530-6984"
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|a "Other: ark:/13030/qt31r2r6qg"
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|a Fischer, Stefan ; Bronstein, Noah D. ; Swabeck, Joseph K. ; Chan, Emory M. ; Alivisatos, A. Paul ;
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|a USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
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|a Lanthanide-doped nanocrystals are of particular interest for the research community not only due to their ability to shape light by downshifting, quantum cutting, and upconversion but also because novel optical properties can be found by the precise engineering of core-shell nanocrystals. Because of the large surface area-to-volume ratio of nanocrystals, the luminescence is typically suppressed by surface quenching. Here, we demonstrate a mechanism that exploits surface quenching processes to improve the luminescence of our core-shell lanthanide-doped nanocrystals. By carefully tuning the shell thickness of inert ?-NaLuF<sub>4</sub> around ?-NaYF<sub>4</sub> nanocrystals doped with Yb<sup>3+</sup> and Er<sup>3+</sup>, we unravel the relationship between quantum yield and shell thickness, and quantify surface quenching rates for the relevant Er<sup>3+</sup> and Yb<sup>3+</sup> energy levels. This enhanced understanding of the system's dynamics allowed us to design nanocrystals with a surface quenching-assisted mechanism for bright NIR to NIR downshifting with a distinctive efficiency peak for an optimized shell thickness.
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|b AC02-05CH11231.
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|b SC0001293.
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|a 37 inorganic, organic, physical, and analytical chemistry
|2 local.
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|a 77 nanoscience and nanotechnology
|2 local.
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|a Lawrence Berkeley National Laboratory.
|4 res
|4 spn.
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|a United States.
|b Department of Energy.
|b Office of Scientific and Technical Information
|4 dst.
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|u http://www.osti.gov/servlets/purl/1532207
|z Full Text (via OSTI)
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|a .b110085954
|b 11-30-21
|c 05-11-20
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|a University of Colorado Boulder
|b Online
|c Online
|d Online
|i web
|n 1
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