Filtration Shell Mediated Power Density Independent Orthogonal Excitations-Emissions Upconversion Luminescence

Lanthanide doped core–multishell structured NaGdF4:Yb,Er@NaYF4:Yb@NaGdF4:Yb,Nd@NaYF4@NaGdF4:Yb,Tm@NaYF4 nanoparticles with power‐density independent orthogonal excitations‐emissions upconversion luminescence (UCL) were fabricated for the first time. The optical properties of these core–multishell st...

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Bibliographic Details
Published in:Angewandte Chemie 2016-02, Vol.128 (7), p.2510-2515
Main Authors: Li, Xiaomin, Guo, Zhenzhen, Zhao, Tiancong, Lu, Yang, Zhou, Lei, Zhao, Dongyuan, Zhang, Fan
Format: Article
Language:eng ; ger
Subjects:
Absorption
Aufwärtskonversion
Chemistry
Chemotherapy
Density
Design
Emissions
Erbium
Excitation
Filtration
Fälschungssicherheit
Imaging
Kombinationstherapie
Lanthanoide
Luminescence
Lumineszenz
Nanoparticles
Nanopartikel
Optical properties
Photodynamic therapy
Security
Thickness
Tuning
Ultraviolet
Upconversion
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Summary:Lanthanide doped core–multishell structured NaGdF4:Yb,Er@NaYF4:Yb@NaGdF4:Yb,Nd@NaYF4@NaGdF4:Yb,Tm@NaYF4 nanoparticles with power‐density independent orthogonal excitations‐emissions upconversion luminescence (UCL) were fabricated for the first time. The optical properties of these core–multishell structured nanoparticles were related to the absorption filtration effect of the NaGdF4:Yb,Tm layer. By tuning the thickness of the filtration layer, the nanoparticles can exhibit unique two independent groups of UCL: Tm3+ prominent UV/blue (UV=ultraviolet) UCL under the excitation at 980 nm and Er3+ prominent green/red UCL under the excitation at 796 nm. The filtration‐shell mediated orthogonal excitations‐emissions UCL are power‐density independent. As a proof of concept, the core–multishell nanoparticles are used in multi‐dimensional security design and imaging‐guided combined photodynamic therapy and chemotherapy. In anderem Licht: Lanthanoid‐dotierte Nanopartikel mit einer lichtfiltrierenden Schale, die zwei unterschiedliche Lumineszenzprozesse interferenzfrei trennt, wurden hergestellt. Die aufwärtskonvertierenden Kern‐Schale‐Nanopartikel zeigen orthogonale Anregungs‐ und Emissionslumineszenzen und könnten als fälschungssichere Marker verwendet werden.
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.201510609