Ultrafast Synthesis and Coating of High Quality β-NaYF4:Yb3+,Ln3+ Short Nanorods
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INVESTIGACIONMetadades
Títol
Ultrafast Synthesis and Coating of High Quality β-NaYF4:Yb3+,Ln3+ Short NanorodsData de publicació
2017-11Editor
American Chemical SocietyCita bibliogràfica
GUZZETTA, Fabrizio; ROIG, Anna; JULIÁN-LÓPEZ, Beatriz. Ultrafast Synthesis and Coating of High-Quality β-NaYF4: Yb3+, Ln3+ Short Nanorods. The Journal of Physical Chemistry Letters, 2017, vol. 8, no 23, p. 5730-5735.Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://pubs.acs.org/doi/abs/10.1021/acs.jpclett.7b02473Versió
info:eu-repo/semantics/submittedVersionParaules clau / Matèries
Resum
An ultrafast route to prepare up-converting single β-phase NaYF4:Yb3+,Ln3+ (Ln: Er, Tm, or Tb) short nanorods (UCNRs) of high quality was developed. This new procedure affords reactive-surface nanorods that are easily ... [+]
An ultrafast route to prepare up-converting single β-phase NaYF4:Yb3+,Ln3+ (Ln: Er, Tm, or Tb) short nanorods (UCNRs) of high quality was developed. This new procedure affords reactive-surface nanorods that are easily coated by direct injection of suitable capping ligands. Thus highly crystalline nanorods with excellent UC fluorescence and good solvent-selective dispersion are obtained, which represents a significant advance in the field and enlarges their use for biomedical and other technological applications. Unlike other methodologies, the short reaction time provides a kinetic control over crystallization processes, and the β-phase and rod morphology is preserved regardless of the optically active Ln3+ ion. The UC emission was finely tuned by using the most popular Yb3+/Tm3+ and Yb3+/Er3+ pairs. More importantly, UCNRs doped with the unusual Yb3+/Tb3+ pair, with no ladder-like energy levels, provided a nice emission upon near-infrared excitation, which constitutes the first example of phonon-assisted cooperative sensitization to date in pure β-NaYF4 nanocrystals. [-]
Proyecto de investigación
Spanish Ministry of Economy (MAT2015-64442-R, MAT2015-64139-C4-1-R, and SEV-2015-0496 projects, cofunded with European Social Funds) ; Universitat Jaume I (P1B2014-21)Drets d'accés
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