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Journal of Fluorine Chemistry Volume 200, August 2017, Pages 18-23

Larisa B. Gulina, Valeri P. Tolstoy, Igor A. Kasatkin, Ilya E. Kolesnikov, Denis V. Danilov

Formation of oriented LaF3 and LaF3:Eu3+ nanocrystals at the gas − solution interface

Journal of Fluorine Chemistry Volume 200, August 2017, Pages 18-23

DOI: 10.1016/j.jfluchem.2017.05.006

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The LaF3 film formed by c-axis oriented uniform-size nanocrystals with diameter of about 400 nm was obtained on the surface of La(NO3)3 solution in 1 M HNO3 by interfacial reaction with HF in the gas medium. The effect of solution acidity on the layer morphology is reported. The film formed by LaF3:Eu3+ oriented nanocrystals with radial compositional gradient has been prepared in a similar way. The synthesized crystals were characterized by SEM, TEM, HRTEM, EPMA, TEM-EDX mapping, XRD analysis, Raman and luminescent spectroscopy. The LaF3:Eu3+ doped nanocrystals can potentially be used as luminescent material.