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Synthesis ofpolyethylenimine/NaYF4 nanoparticles with upconversion fluorescence

Identifieur interne : 001715 ( Main/Exploration ); précédent : 001714; suivant : 001716

Synthesis ofpolyethylenimine/NaYF4 nanoparticles with upconversion fluorescence

Auteurs : Feng Wang [Singapour, République populaire de Chine] ; Dev K. Chatterjee [Singapour] ; Zhengquan Li [Singapour] ; Yong Zhang [Singapour] ; Xianping Fan [République populaire de Chine] ; Minquan Wang [République populaire de Chine]

Source :

Nanotechnology [ 0957-4484 ] ; 2006.

RBID : ISTEX:F0FE797E1920E3E703A16B68248EA9457CECB88E

Descripteurs français

Wicri :
- geographic : Singapour.

English descriptors

Abstract

Upconverting materials, which can be efficiently excited by near infrared light and emitstrong visible light through a process termed upconversion fluorescence, have shown greatpotential for use in biological labelling and imaging. Some upconverting nanoparticles such asNaYF4 doped with lanthanide ions have been synthesized; however, these nanoparticles are notsoluble in water, not biocompatible and do not have functional chemical groups forconjugation of biomolecules, and as a result their bioapplications are very limited unlesssome surface modifications are performed. Here we report a method for one-pot synthesis ofpolyethylenimine/NaYF4 nanoparticles doped with lanthanide ions, which are water soluble andbiocompatible. The amino groups of polyethylenimine existing on the nanoparticlescan be used for attachment of biomolecules. The nanoparticles showed aspherical shape with an average size of about 50nm. Different lanthanide ions(Yb3,Er3 and Tm3) were doped into the nanoparticles, which showed strong upconversion fluorescence ofdifferent colours in aqueous solutions under excitation at 980nm.

Url:

https://api.istex.fr/document/F0FE797E1920E3E703A16B68248EA9457CECB88E/fulltext/pdf

DOI: 10.1088/0957-4484/17/23/013

Affiliations:

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Le document en format XML

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<term>Cell survival</term>
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<term>Chem</term>
<term>Cubic phase</term>
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<term>Emission intensity</term>
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<term>Long term effect</term>
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<front><div type="abstract">Upconverting materials, which can be efficiently excited by near infrared light and emitstrong visible light through a process termed upconversion fluorescence, have shown greatpotential for use in biological labelling and imaging. Some upconverting nanoparticles such asNaYF4 doped with lanthanide ions have been synthesized; however, these nanoparticles are notsoluble in water, not biocompatible and do not have functional chemical groups forconjugation of biomolecules, and as a result their bioapplications are very limited unlesssome surface modifications are performed. Here we report a method for one-pot synthesis ofpolyethylenimine/NaYF4 nanoparticles doped with lanthanide ions, which are water soluble andbiocompatible. The amino groups of polyethylenimine existing on the nanoparticlescan be used for attachment of biomolecules. The nanoparticles showed aspherical shape with an average size of about 50nm. Different lanthanide ions(Yb3,Er3 and Tm3) were doped into the nanoparticles, which showed strong upconversion fluorescence ofdifferent colours in aqueous solutions under excitation at 980nm.</div>
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Synthesis ofpolyethylenimine/NaYF4 nanoparticles with upconversion fluorescence

Synthesis ofpolyethylenimine/NaYF4 nanoparticles with upconversion fluorescence

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri