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. 2020 Aug 7;8:639. doi: 10.3389/fchem.2020.00639

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Copyright © 2020 Wang, Wang, Huang, Chen and Wu.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Characterization of LaF₃:Ce NPs. (A) Transmission electron microscopy images of LaF₃:Ce NPs. (B) PL spectra of LaF₃:Ce NPs. The inset is the photograph of LaF₃:Ce NPs under a UV lamp (λ_ex = 254 nm). (C) UV-vis absorption spectra of the reagent in the CL reaction. (D) FT-IR spectra of LaF₃:Ce NPs.