Ionic dynamics in nano-structured 2D superionic conductors LaF 3 obtained by a synthesis at the gas–solution interface has been analyzed using 19 F NMR Static Field Gradient (SFG) diffusometry in a temperature range up to 800 K. The fluorine diffusion in 2D materials is significantly higher as compared to that in bulk LaF 3 and is strongly dependent on the nano-crystalline sheet thickness. Its decrease from 18 nm to 6 nm leads to an increase of mobility by almost two orders of magnitude, resulting in an overall mobility enhancement of more than three orders of magnitude compared to mono-crystalline LaF 3 . Moreover, the activation energy is reduced from 1.2 eV for mono-crystals to 0.23 eV for 6 nm thin nano-crystalline powder samples.
CITATION STYLE
Gulina, L. B., Schikora, M., Privalov, A. F., Weigler, M., Tolstoy, V. P., Murin, I. V., & Vogel, M. (2019). Influence of Morphology of LaF 3 Nano-crystals on Fluorine Dynamics Studied by NMR Diffusometry. Applied Magnetic Resonance, 50(4), 579–588. https://doi.org/10.1007/s00723-018-1077-z
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