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Ttttt Essay

  • Submitted by: aeroliwei
  • on November 24, 2012
  • Category: Social Issues
  • Length: 3,919 words

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Below is an essay on "Ttttt" from Anti Essays, your source for research papers, essays, and term paper examples.

Progress in Natural Science: Materials International ]]]];](]):]]] – ]]]
Chinese Materials Research Society

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Progress in Natural Science: Materials International

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www.elsevier.com/locate/pnsmi
www.sciencedirect.com

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ORIGINAL RESEARCH

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Facile one-pot sonochemical synthesis of hydrophilic
ultrasmall LaF3:Ce,Tb nanoparticles with
green luminescence

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Q1

Lisha Zhanga, Wei Lib, Xianghua Hub, Yanlin Pengb, Junqing Hub, Xingyu Kuangb,
Linlin Songb, Zhigang Chena,b,n

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a

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Environmental Science
and Engineering, Donghua University, Shanghai 201620, China
b
College of Materials Science and Engineering, Donghua University, Shanghai 201620, China

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Received 14 May 2012; accepted 6 July 2012

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Abstract Rare earth nanoparticles (RENPs) have great superiority as luminescent materials for broad
applications, and a prerequisite for most of their application is to obtain hydrophilic RENPs with efficient
luminescence and small diameter (o10 nm). To address this problem, we report a facile one-pot
sonochemical route with tetraethylene glycol as the solvent and tetrafluoroborate-based ionic liquid as the
fluorine source for the synthesis of LaF3:Ce,Tb as the model of RENPs. LaF3:Ce,Tb nanoparticles with
the diameter of about 6 nm were prepared in a very short ultrasound time (10 min). Fourier transform
infrared spectrum reveals the presence of tetraethylene glycol ligands on their surface, which confers high
solubility of LaF3:Ce,Tb nanoparticles in water. Under 254 nm UV excitation, the aqueous dispersion of
LaF3:Ce,Tb nanoparticles exhibits strong green emission with luminescent quantum yield of $50%. This
work probably contributes to not only the fundamental research of shape-controlled LaF3:Ce,Tb
nanoparticles but also new methods of producing other RENPs for broad applications....

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  • Submitted by: aeroliwei
  • on November 24, 2012
  • Category: Social Issues
  • Length: 3,919 words
  • Views: 315
  • Popularity Rank: 372736
  • 1 rating(s)

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