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Colloid and Polymer Science

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01.11.2013 | Original Contribution

Controllable synthesis of β-NaYF₄:Yb,Er nanorods by potassium oleate as ligand

verfasst von: Qing Tian, Ke Tao, Zhaofeng Zhang, Kang Sun

Erschienen in: Colloid and Polymer Science | Ausgabe 11/2013

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Abstract

By using potassium oleate (KOL) as a part of ligand, nanorods of β-NaYF₄:Yb,Er were synthesized. The aspect ratio of β-NaYF₄:Yb,Er nanocrystals was tuned by changing the amount of KOL. We found that potassium from KOL is not only absorbed on the surface of nanocrystals, but also partially substitutes Na element in nanocrystals lattice. Different from the classical shape control mechanism that oleate ions are absorbed on different facets of nanocrystals, the anisotropic growth of β-NaYF₄:Yb,Er in current work is caused by the doping of K⁺. The incorporation of K⁺ would not lead to obvious decrease of the upconversion fluorescence intensity. Meanwhile, oleate ions promote the phase transition of nanocrystals from cubic to hexagonal phase, resulting in the simultaneous controllability of the nanocrystals size.

Vorheriger Artikel Poly(N-isopropylacrylamide-co-N-t-butylacrylamide)-block-poly(ethylene glycol)-block-poly(N-isopropylacrylamide-co-N-t-butylacrylamide) triblock copolymers: synthesis and thermogelation properties of aqueous solutions

Nächster Artikel Crystallization of a polyamide 11/organo-modified montmorillonite nanocomposite at rapid cooling

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Titel: Controllable synthesis of β-NaYF4:Yb,Er nanorods by potassium oleate as ligand
verfasst von: Qing Tian
Ke Tao
Zhaofeng Zhang
Kang Sun
Publikationsdatum: 01.11.2013
Verlag: Springer Berlin Heidelberg
Erschienen in: Colloid and Polymer Science / Ausgabe 11/2013
Print ISSN: 0303-402X
Elektronische ISSN: 1435-1536
DOI: https://doi.org/10.1007/s00396-013-2995-9

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