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Enhancing upconversion of manganese through spatial control of energy migration for multi-level anti-counterfeiting

The upconversion of manganese (Mn 2+ ) exhibits a green light output with a much longer lifetime than that of lanthanide ions, showing great potential in the frontier applications like information security and anti-counterfeiting. Mn 2+ can be activated by energy migration upconversion. However, the...

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Published in:Nanoscale 2021-09, Vol.13 (33), p.13995-14
Main Authors: Yan, Long, Wang, Xixi, An, Zhengce, Hu, Zhiyong, Liu, Huiming, Xu, Shanhui, Zhou, Bo
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cited_by cdi_FETCH-LOGICAL-c314t-4cbfd0e997039cae91e999ff64d8db672a953c7a29f42ec27a4f5451a7faccbb3
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container_issue 33
container_start_page 13995
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creator Yan, Long
Wang, Xixi
An, Zhengce
Hu, Zhiyong
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Xu, Shanhui
Zhou, Bo
description The upconversion of manganese (Mn 2+ ) exhibits a green light output with a much longer lifetime than that of lanthanide ions, showing great potential in the frontier applications like information security and anti-counterfeiting. Mn 2+ can be activated by energy migration upconversion. However, there exists serious quenching interactions between Mn 2+ and the lanthanides at the core-shell interfacial area, which would markedly reduce the role of Tm 3+ as a ladder to facilitate the up-transition and subsequently limit the upconversion of Mn 2+ . Here, we propose a mechanistic strategy to enhance the upconversion luminescence of Mn 2+ by spatial control of energy migration among Gd sublattice through introducing an additional migratory NaGdF 4 interlayer within the commonly used core-shell nanostructure. This design can not only isolate the interfacial quenching interactions between the sensitized core and luminescent shell, but also allow an efficient channel for energy transport, resulting in enhanced upconversion of Mn 2+ . Moreover, the relatively long lifetime of Mn 2+ (around 32.861 ms) provides new possibilities to utilize the temporal characteristic for the frontier application of multi-level anti-counterfeiting through combining the time-gating technology. We report a mechanistic strategy to enhance the upconversion of Mn 2+ by designing a migratory NaGdF 4 interlayer in the core-shell nanostructure, showing great potential in multi-level anti-counterfeiting.
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source Royal Society of Chemistry:Jisc Collections:Royal Society of Chemistry Read and Publish 2022-2024 (reading list)
subjects Core-shell structure
Counterfeiting
Gadolinium
Interlayers
Lanthanides
Manganese
Quenching
Upconversion
title Enhancing upconversion of manganese through spatial control of energy migration for multi-level anti-counterfeiting
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