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Open AccessArticle

NaYF4 Microstructure, beyond Their Well-Shaped Morphology

1
Laboratoire de Physique de la Matière Condensée, École Polytechnique, CNRS, Université Paris Saclay, 91128 Palaiseau, France
2
Laboratoire des Solides Irradiés, École Polytechnique, CNRS, Université Paris Saclay, 91128 Palaiseau, France
*
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(11), 1560; https://doi.org/10.3390/nano9111560
Received: 11 September 2019 / Revised: 11 October 2019 / Accepted: 22 October 2019 / Published: 4 November 2019
(This article belongs to the Special Issue Luminescent Rare-Earth Based Nanomaterials)
Lanthanide-doped nanoparticles are widely investigated for their optical properties. However, the sensitivity of the lanthanide ions’ luminescence to the local symmetry, useful when investigating structural environments, becomes a drawback for optimized properties in the case of poorly controlled crystallinity. In this paper, we focus on β -NaYF4 nanorods in order to provide a detailed description of their chemical composition and microstructure. The combination of detailed XRD analysis and TEM observations show that strong variation may be observed from particles from a same batch of synthesis, but also when considering small variations of synthesis conditions. Moreover, also the nanorods observed by SEM exhibit a very nice faceted shape, they are far from being monocrystalline and present significant local deviation of crystalline symmetry and orientation. All these structural considerations, sensitively probed by polarized emission analysis, are crucial to analyze for the development of optimal systems toward the targeted applications. View Full-Text
Keywords: X-ray diffraction; crystalline structure; polarized luminescence X-ray diffraction; crystalline structure; polarized luminescence
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Leménager, G.; Tusseau-Nenez, S.; Thiriet, M.; Coulon, P.-E.; Lahlil, K.; Larquet, E.; Gacoin, T. NaYF4 Microstructure, beyond Their Well-Shaped Morphology. Nanomaterials 2019, 9, 1560.

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