Synthesis of beta-Phase NaYF4:Yb,Er Upconversion Nanocrystals and Nanorods by Hot-Injection of Small Particles of the alpha-Phase

Autor(en): Nordmann, Joerg
Voss, Benjamin
Komban, Rajesh
Koempe, Karsten
Raj, Athira Naduviledathu
Rinkel, Thorben
Duehnen, Simon
Haase, Markus 
Stichwörter: Chemistry; Chemistry, Physical; CORE; EMISSION; ER3+; Fluoride; HEXAGONAL-PHASE; Hot-Injection Synthesis; LUMINESCENCE; Nanoparticle Growth; NANOPARTICLES; NAYF4-YB,ER; SIZE CONTROL; Sodium Yttrium; TRANSITION; Upconversion Luminescence; YB3+
Erscheinungsdatum: 2015
Herausgeber: WALTER DE GRUYTER GMBH
Journal: ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS
Volumen: 229
Ausgabe: 1-2, SI
Startseite: 247
Seitenende: 262
Zusammenfassung: 
beta-NaYF4:Yb,Er upconversion nanocrystals are synthesized by a hot-injection method employing purified alpha-NaYF4:Yb,Er particles with a size of approximately 2-3 nm as single-source precursor. The method allows to prepare either spherical nanoparticles with different sizes or nanorods by simply controlling the addition rate of the solution of alpha-phase particles and performing the synthesis either in the absence or in the presence of seed particles. The luminescence properties of the different particles are compared also including core-shell particles.
ISSN: 09429352
DOI: 10.1515/zpch-2014-0616

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