Luminescence properties of LaF3:Ce nanoparticles encapsulated by oleic acid

被引:10
作者
Kim, Jaewoo [1 ,2 ,5 ]
Lee, Jun-Hyung [1 ]
An, Hyejin [1 ]
Lee, Jungkuk [2 ,3 ]
Park, Seong-Hee [2 ,3 ]
Seo, Young-Soo [4 ]
Miller, William H. [5 ]
机构
[1] Korea Atom Energy Res Inst, Nucl Mat Res Div, Daejeon Si 303353, South Korea
[2] Korea Atom Energy Res Inst, WCI Quantum Beam Based Radiat Res Ctr, Daejeon Si 303353, South Korea
[3] Univ Sci & Technol, Dept Quantum Energy & Chem Engn, Daejeon Si 305350, South Korea
[4] Sejong Univ, Dept Nano Sci & Technol, Seoul 143747, South Korea
[5] Univ Missouri, Missouri Univ Res Reactor, Columbia, MO 65211 USA
基金
新加坡国家研究基金会;
关键词
Halides; Nanostructures; Chemical synthesis; Infrared spectroscopy; Luminescence; ENERGY-RESOLUTION SCINTILLATOR; DOPED LANTHANUM FLUORIDE; HYDROTHERMAL SYNTHESIS; OPTICAL-PROPERTIES; NANOCRYSTALS; CERIUM; NANOPHOSPHORS; LAPO4; EXCITATION; CRYSTALS;
D O I
10.1016/j.materresbull.2014.05.018
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Cerium ions doped lanthanum fluoride (LaF3:Ce) nanopowder as well as LaF3:Ce nanopowder whose surfaces was modified by oleic acid (OA) were synthesized by using an in-situ hydrothermal process under the various doping concentrations. Based on the XRD spectra and TEM images, it was confirmed that the crystalline structured hexagonal LaF3:Ce nanopowder was synthesized. Oleic acid was efficient for conversion of the water dispersible LaF3:Ce nanoparticles to hydrophobic ones. Surface modification was verified by FTIR absorption spectrum as well as TEM images, showing no agglomeration between 5 and 10 nm scaled particles. Photoluminescence based on 5d -> 4f electronic transition of cerium ions excited at lambda(ex) similar to 256 nm for both neat and OA encapsulated LaF3:Ce nanoparticles decreases as the cerium concentration increases, while the quantum yields of OA encapsulated nanoparticles were much lower than the neat particles due to low photon transmittance of OA at the range longer than similar to 350 nm. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:110 / 115
页数:6
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