Toward a Chemical Control of Colloidal YVO4 Nanoparticles Microstructure

Langmuir : the ACS Journal of Surfaces and Colloids
Marie-Alexandra NeouzeThierry Gacoin

Abstract

Rare-earth-doped oxides are a class of compounds that have been largely studied in the context of the development of luminescent nanocrystals for various applications including fluorescent labels for bioimaging, MRI contrast agents, luminescent nanocomposite coatings, etc. Elaboration of colloidal suspensions is usually achieved through coprecipitation. Particles exhibit emission properties that are similar to the bulk counterparts, although altered by crystalline defects or surface quenching species. Focusing on YVO4:Eu, one of the first reported systems, the aim of this work is to revisit the elaboration of nanoparticles obtained through a simple aqueous coprecipitation route. The objective is more precisely to get a better understanding of the parameters affecting the particles' internal microstructure, a feature that is poorly controlled and characterized. We show that the hydroxyl concentration in the precursor solution has a drastic effect on the particles' microstructure. Moreover, discrepancies in the reported particle structure are shown to possibly arise from the carbonation of the strongly basic orthovanadate precursor. For this study, SAXS/WAXS is shown to be a powerful tool to characterize the multiscale structure ...Continue Reading

References

Apr 6, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·D SenA Thill
Aug 11, 2006·The Journal of Physical Chemistry. B·Xingcai WuJunjie Zhu
Oct 11, 2011·ACS Nano·Cedric BouziguesAntigoni Alexandrou
Oct 23, 2013·ACS Applied Materials & Interfaces·Géraldine DantelleThierry Gacoin
Dec 14, 2018·Journal of Applied Crystallography·Theyencheri NarayananPeter Boesecke

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