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Proceedings Paper

Optical properties and mechanisms in Cr3+,Bi3+-codoped oxide-based spinel nanoparticles
Author(s): Morgane Pellerin; Cristina Coelho-Diogo; Christian Bonhomme; Nadia Touatib; Laurent Binet; Didier Gourier; Jumpei Ueda; Setsuhisa Tanabe; Bruno Viana; Corinne Chanéac
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Paper Abstract

At the nanoscale, the ZnGa2O4 spinel doped with chromium (III) is an interesting material for in vivo optical imaging due to its bright red persistent luminescence after UV and visible excitation. Moreover its persistent luminescent properties can be improved with the incorporation of bismuth (III) as a co-dopant without any structure changes. The nanoparticles are synthesized by soft chemistry using microwave heating in aqueous media. These very small sized nanophosphors (around 10 nm) present interesting long lasting persistent luminescence after annealing at 1000°C and they can be excited both under UV and under visible LED excitation. In this work we try to understand the mechanisms of the persistent luminescent properties of such nanomaterials. Thermoluminescence is performed to investigate trapping and detrapping processes as well as trap distribution. The chromium local environment is studied by Electron Paramagnetic Resonance. 71Ga Nuclear Magnetic Resonance is used to get information on the gallium ions repartition (tetrahedral or octahedral site) in the structure. Comparison of optical properties versus local structure increases the understanding of the persistent luminescence mechanism and gives insights to the new modalities for their use as nanoprobes for in vivo imaging.

Paper Details

Date Published: 16 February 2017
PDF: 7 pages
Proc. SPIE 10100, Optical Components and Materials XIV, 101000B (16 February 2017); doi: 10.1117/12.2253852
Show Author Affiliations
Morgane Pellerin, Sorbonne Univ., UPMC Univ. Paris 06, CNRS, Collège de France, Lab. de Chimie de la Matière Condensée (France)
Institut de Recherche Chimie-Paris, Chimie ParisTech, CNRS (France)
Cristina Coelho-Diogo, Sorbonne Univ., UPMC Univ. Paris 06, CNRS, Institut des Matériaux de Paris Ctr. (France)
Christian Bonhomme, Sorbonne Univ., UPMC Univ. Paris 06, CNRS, Collège de France, Lab. de Chimie de la Matière Condensée (France)
Nadia Touatib, Institut de Recherche Chimie-Paris, Chimie ParisTech, CNRS (France)
Laurent Binet, Institut de Recherche Chimie-Paris, Chimie ParisTech, CNRS (France)
Didier Gourier, Institut de Recherche Chimie-Paris, Chimie ParisTech, CNRS (France)
Jumpei Ueda, Kyoto Univ. (Japan)
Setsuhisa Tanabe, Kyoto Univ. (Japan)
Bruno Viana, Institut de Recherche Chimie-Paris, Chimie ParisTech, CNRS (France)
Corinne Chanéac, Sorbonne Univ., UPMC Univ. Paris 06, CNRS, Collège de France, Lab. de Chimie de la Matière Condensée (France)


Published in SPIE Proceedings Vol. 10100:
Optical Components and Materials XIV
Shibin Jiang; Michel J. F. Digonnet, Editor(s)

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