skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Luminescence properties of LaF{sub 3}:Ce nanoparticles encapsulated by oleic acid

Abstract

Highlights: • In-situ hydrophobization of water dispersible LaF{sub 3}:Ce nanoparticles was achieved. • Oleic acid surface modification of the nanoparticles was verified by IR spectra. • Quantum yields of LaF{sub 3}:Ce and OA-LaF{sub 3}:Ce nanoparticles were evaluated. • Quantum yields of LaF{sub 3}:Ce are strongly dependent on OA surface modification. - Abstract: Cerium ions doped lanthanum fluoride (LaF{sub 3}:Ce) nanopowder as well as LaF{sub 3}: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 LaF{sub 3}:Ce nanopowder was synthesized. Oleic acid was efficient for conversion of the water dispersible LaF{sub 3}: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 λ{sub ex} ∼256 nm for both neat and OA encapsulated LaF{sub 3}: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 ofmore » OA at the range longer than ∼350 nm.« less

Authors:
 [1];  [2];  [3]; ;  [1]; ;  [4];  [2];  [5];  [6]
  1. Nuclear Materials Research Division, Korea Atomic Energy Research Institute, 111 Daedeok-daero 989 beon-gil, Yuseong-gu, Daejeon-si 303-353 (Korea, Republic of)
  2. (Korea, Republic of)
  3. (United States)
  4. WCI Quantum Beam-based Radiation Research Center, Korea Atomic Energy Research Institute, 111 Daedeok-daero 989 beon-gil, Yuseong-gu, Daejeon-si 303-353 (Korea, Republic of)
  5. Department of Nano Science and Technology, Sejong University, 98 Gunja-dong, Gwangjin-gu 143-747 (Korea, Republic of)
  6. Missouri University Research Reactor, University of Missouri, Columbia, MO 65211 (United States)
Publication Date:
OSTI Identifier:
22420551
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 57; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION SPECTRA; ABSORPTION SPECTROSCOPY; AGGLOMERATION; CERIUM; CERIUM IONS; CONCENTRATION RATIO; DOPED MATERIALS; FOURIER TRANSFORMATION; INFRARED SPECTRA; LANTHANUM FLUORIDES; NANOPARTICLES; NANOSTRUCTURES; OLEIC ACID; PHOTOLUMINESCENCE; POWDERS; SURFACES; SYNTHESIS; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION

Citation Formats

Kim, Jaewoo, E-mail: kimj@kaeri.re.kr, WCI Quantum Beam-based Radiation Research Center, Korea Atomic Energy Research Institute, 111 Daedeok-daero 989 beon-gil, Yuseong-gu, Daejeon-si 303-353, Missouri University Research Reactor, University of Missouri, Columbia, MO 65211, Lee, Jun-Hyung, An, Hyejin, Lee, Jungkuk, Park, Seong-Hee, Department of Quantum Energy and Chemical Engineering, University of Science and Technology, 217 Gajeongro, Yuseong-gu, Daejoen-si 305-350, Seo, Young-Soo, and Miller, William H. Luminescence properties of LaF{sub 3}:Ce nanoparticles encapsulated by oleic acid. United States: N. p., 2014. Web. doi:10.1016/J.MATERRESBULL.2014.05.018.
Kim, Jaewoo, E-mail: kimj@kaeri.re.kr, WCI Quantum Beam-based Radiation Research Center, Korea Atomic Energy Research Institute, 111 Daedeok-daero 989 beon-gil, Yuseong-gu, Daejeon-si 303-353, Missouri University Research Reactor, University of Missouri, Columbia, MO 65211, Lee, Jun-Hyung, An, Hyejin, Lee, Jungkuk, Park, Seong-Hee, Department of Quantum Energy and Chemical Engineering, University of Science and Technology, 217 Gajeongro, Yuseong-gu, Daejoen-si 305-350, Seo, Young-Soo, & Miller, William H. Luminescence properties of LaF{sub 3}:Ce nanoparticles encapsulated by oleic acid. United States. doi:10.1016/J.MATERRESBULL.2014.05.018.
Kim, Jaewoo, E-mail: kimj@kaeri.re.kr, WCI Quantum Beam-based Radiation Research Center, Korea Atomic Energy Research Institute, 111 Daedeok-daero 989 beon-gil, Yuseong-gu, Daejeon-si 303-353, Missouri University Research Reactor, University of Missouri, Columbia, MO 65211, Lee, Jun-Hyung, An, Hyejin, Lee, Jungkuk, Park, Seong-Hee, Department of Quantum Energy and Chemical Engineering, University of Science and Technology, 217 Gajeongro, Yuseong-gu, Daejoen-si 305-350, Seo, Young-Soo, and Miller, William H. Mon . "Luminescence properties of LaF{sub 3}:Ce nanoparticles encapsulated by oleic acid". United States. doi:10.1016/J.MATERRESBULL.2014.05.018.
@article{osti_22420551,
title = {Luminescence properties of LaF{sub 3}:Ce nanoparticles encapsulated by oleic acid},
author = {Kim, Jaewoo, E-mail: kimj@kaeri.re.kr and WCI Quantum Beam-based Radiation Research Center, Korea Atomic Energy Research Institute, 111 Daedeok-daero 989 beon-gil, Yuseong-gu, Daejeon-si 303-353 and Missouri University Research Reactor, University of Missouri, Columbia, MO 65211 and Lee, Jun-Hyung and An, Hyejin and Lee, Jungkuk and Park, Seong-Hee and Department of Quantum Energy and Chemical Engineering, University of Science and Technology, 217 Gajeongro, Yuseong-gu, Daejoen-si 305-350 and Seo, Young-Soo and Miller, William H.},
abstractNote = {Highlights: • In-situ hydrophobization of water dispersible LaF{sub 3}:Ce nanoparticles was achieved. • Oleic acid surface modification of the nanoparticles was verified by IR spectra. • Quantum yields of LaF{sub 3}:Ce and OA-LaF{sub 3}:Ce nanoparticles were evaluated. • Quantum yields of LaF{sub 3}:Ce are strongly dependent on OA surface modification. - Abstract: Cerium ions doped lanthanum fluoride (LaF{sub 3}:Ce) nanopowder as well as LaF{sub 3}: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 LaF{sub 3}:Ce nanopowder was synthesized. Oleic acid was efficient for conversion of the water dispersible LaF{sub 3}: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 λ{sub ex} ∼256 nm for both neat and OA encapsulated LaF{sub 3}: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 ∼350 nm.},
doi = {10.1016/J.MATERRESBULL.2014.05.018},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = ,
volume = 57,
place = {United States},
year = {2014},
month = {9}
}