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Synthesis and Characterization of Single‐Crystalline Lanthanum Fluoride with a Ring‐Like Nanostructure
Author(s) -
Tian Yang,
Wen Jing,
Liu Bin,
Sui Ning,
Jin Qionghua,
Jiao Xiuling
Publication year - 2009
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200900126
Subject(s) - chemistry , nanostructure , photoluminescence , nanocrystal , spectroscopy , lanthanum , chemical engineering , nanotechnology , luminescence , nanoparticle , template , inorganic chemistry , materials science , optoelectronics , physics , quantum mechanics , engineering
LaF 3 ring‐like nanostructures with a diameter of less than 2 μm have been fabricated by a facile, effective, and environmentally friendly molten salt synthesis route in which NaNO 3 and KNO 3 (2:1 molar ratio) act as reaction media and the rare‐earth nitrate and NaF as precursor. X‐ray diffraction, TEM, HR‐TEM, energy dispersive X‐ray spectroscopy, and photoluminescence spectroscopy are all used to characterize the as‐prepared samples. Experiments peformed with different reaction times indicate that a central‐etching of the plates from the inner part towards the edge during nanocrystal growth plays a key role in the formation of LaF 3 nanorings since no other templates/surfactants are present in our system. Additionally, the luminescence properties of LaF 3 nanorings doped with Eu 3+ cation have been investigated andcompared with those of bulk materials and nanoparticles with a size of approximately 50 nm. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)