An Electron Paramagnetic Resonance Spectroscopic Investigation on the Growth Mechanism of NaYF4:Gd Nanocrystals

Doped nanocrystals of NaYF4 and NaGdF4 are currently studied as upconversion luminescence markers and magnetic resonance imaging contrast agents. An EPR investigation on the growth mechanism of NaYF4:Gd and NaGdF4 nanocrystals showed that these nanomaterials grow in the standard oleic acid‐based rea...

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Veröffentlicht in:	Angewandte Chemie International Edition 2012-06, Vol.51 (26), p.6506-6510
Hauptverfasser:	Komban, Rajesh, Klare, Johann P., Voss, Benjamin, Nordmann, Jörg, Steinhoff, Heinz-Jürgen, Haase, Markus
Format:	Artikel
Sprache:	eng
Schlagworte:	core-shell heterostructures Electron Spin Resonance Spectroscopy EPR spectroscopy Gallium - chemistry growth mechanism Metal Nanoparticles - chemistry Metal Nanoparticles - ultrastructure Microscopy, Electron, Transmission Nanocrystals nanoparticle upconversion Yttrium - chemistry
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Zusammenfassung:	Doped nanocrystals of NaYF4 and NaGdF4 are currently studied as upconversion luminescence markers and magnetic resonance imaging contrast agents. An EPR investigation on the growth mechanism of NaYF4:Gd and NaGdF4 nanocrystals showed that these nanomaterials grow in the standard oleic acid‐based reaction medium by a dissolution/recrystallization mechanism and not by the aggregation or oriented attachment of smaller particles.
ISSN:	1433-7851 1521-3773
DOI:	10.1002/anie.201201025