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Eu-Doped Pyrochlore Crystal Nano-Powders as Fluorescent Solid for Fingerprint Visualization and for Anti-Counterfeiting Applications

Undoped Y(2)Sn(2)O(7) and Eu(3+) doped Y(2)Sn(2)O(7) samples with doping concentrations 7%, 8%, 9%, and 10% are successfully synthesized by the co-precipitation method. A complete structural, morphological, and spectroscopic characterization is carried out. XRD measurements reveal that samples cryst...

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Autores principales: Brini, Layla, Bennour, Ines, Toncelli, Alessandra, Maalej, Ramzi, Abdelhedi, Mohamed
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8999860/
https://www.ncbi.nlm.nih.gov/pubmed/35407757
http://dx.doi.org/10.3390/ma15072423
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author Brini, Layla
Bennour, Ines
Toncelli, Alessandra
Maalej, Ramzi
Abdelhedi, Mohamed
author_facet Brini, Layla
Bennour, Ines
Toncelli, Alessandra
Maalej, Ramzi
Abdelhedi, Mohamed
author_sort Brini, Layla
collection PubMed
description Undoped Y(2)Sn(2)O(7) and Eu(3+) doped Y(2)Sn(2)O(7) samples with doping concentrations 7%, 8%, 9%, and 10% are successfully synthesized by the co-precipitation method. A complete structural, morphological, and spectroscopic characterization is carried out. XRD measurements reveal that samples crystallize in the pure single pyrochlore phase and Eu(3+) ions occupy sites with D(3d) symmetry. After mechanical grinding, the average crystallite size is less than 100 nm for all compositions. Optical characterization shows emission from the (5)D(0) level towards the lower lying (7)F(0,1,2,3,4) levels. The CIE color coordinates of all the pyrochlore phosphors are very close to those of the ideal red light. For the visualization of latent fingerprints, different surfaces are tested, including difficult ones (wood and ceramic), with excellent results. All three levels of fingerprint ridge patterns are visualized: core (Level 1), bifurcation and termination (Level 2), and sweat pores (Level 3). Moreover, our nano-powders are used to prepare a stable fluorescent ink.
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spelling pubmed-89998602022-04-12 Eu-Doped Pyrochlore Crystal Nano-Powders as Fluorescent Solid for Fingerprint Visualization and for Anti-Counterfeiting Applications Brini, Layla Bennour, Ines Toncelli, Alessandra Maalej, Ramzi Abdelhedi, Mohamed Materials (Basel) Article Undoped Y(2)Sn(2)O(7) and Eu(3+) doped Y(2)Sn(2)O(7) samples with doping concentrations 7%, 8%, 9%, and 10% are successfully synthesized by the co-precipitation method. A complete structural, morphological, and spectroscopic characterization is carried out. XRD measurements reveal that samples crystallize in the pure single pyrochlore phase and Eu(3+) ions occupy sites with D(3d) symmetry. After mechanical grinding, the average crystallite size is less than 100 nm for all compositions. Optical characterization shows emission from the (5)D(0) level towards the lower lying (7)F(0,1,2,3,4) levels. The CIE color coordinates of all the pyrochlore phosphors are very close to those of the ideal red light. For the visualization of latent fingerprints, different surfaces are tested, including difficult ones (wood and ceramic), with excellent results. All three levels of fingerprint ridge patterns are visualized: core (Level 1), bifurcation and termination (Level 2), and sweat pores (Level 3). Moreover, our nano-powders are used to prepare a stable fluorescent ink. MDPI 2022-03-25 /pmc/articles/PMC8999860/ /pubmed/35407757 http://dx.doi.org/10.3390/ma15072423 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Brini, Layla
Bennour, Ines
Toncelli, Alessandra
Maalej, Ramzi
Abdelhedi, Mohamed
Eu-Doped Pyrochlore Crystal Nano-Powders as Fluorescent Solid for Fingerprint Visualization and for Anti-Counterfeiting Applications
title Eu-Doped Pyrochlore Crystal Nano-Powders as Fluorescent Solid for Fingerprint Visualization and for Anti-Counterfeiting Applications
title_full Eu-Doped Pyrochlore Crystal Nano-Powders as Fluorescent Solid for Fingerprint Visualization and for Anti-Counterfeiting Applications
title_fullStr Eu-Doped Pyrochlore Crystal Nano-Powders as Fluorescent Solid for Fingerprint Visualization and for Anti-Counterfeiting Applications
title_full_unstemmed Eu-Doped Pyrochlore Crystal Nano-Powders as Fluorescent Solid for Fingerprint Visualization and for Anti-Counterfeiting Applications
title_short Eu-Doped Pyrochlore Crystal Nano-Powders as Fluorescent Solid for Fingerprint Visualization and for Anti-Counterfeiting Applications
title_sort eu-doped pyrochlore crystal nano-powders as fluorescent solid for fingerprint visualization and for anti-counterfeiting applications
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8999860/
https://www.ncbi.nlm.nih.gov/pubmed/35407757
http://dx.doi.org/10.3390/ma15072423
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