Upconversion Modulation through Pulsed Laser Excitation for Anti-counterfeiting

Abstract Lanthanide-doped upconversion nanomaterials are emerging as promising candidates in optoelectronics, volumetric display, anti-counterfeiting as well as biological imaging and therapy. Typical modulations of upconversion through chemical methods, such as controlling phase, composition, morph...

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Autores principales:	Yingdong Han, Hongyu Li, Yangbo Wang, Yue Pan, Ling Huang, Feng Song, Wei Huang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0d29b1b1f617430f8a18e14fc3668c5b
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spelling	oai:doaj.org-article:0d29b1b1f617430f8a18e14fc3668c5b2021-12-02T16:07:49ZUpconversion Modulation through Pulsed Laser Excitation for Anti-counterfeiting10.1038/s41598-017-01611-92045-2322https://doaj.org/article/0d29b1b1f617430f8a18e14fc3668c5b2017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01611-9https://doaj.org/toc/2045-2322Abstract Lanthanide-doped upconversion nanomaterials are emerging as promising candidates in optoelectronics, volumetric display, anti-counterfeiting as well as biological imaging and therapy. Typical modulations of upconversion through chemical methods, such as controlling phase, composition, morphology and size enable us to rationally manipulate emission profiles and lifetimes of lanthanide ions by using continuous-wave laser excitation. Here we demonstrate that under pulsed laser excitation the emission color of NaYF4:Er/Tm (2/0.5%)@NaYF4 core-shell nanoparticles has an obvious transformation from green to red colors. Moreover, both pulse duration and repetition frequency are responsible for manipulating the upconversion emission color. The mechanism of the phenomena may be that the pulsed laser sequence triggers the emission levels to non-steady upconversion states first, and then cuts off the unfinished population process within the pulse duration. This pump source dependent and resultant tunable fluorescence emission enables NaYF4:Er/Tm (2/0.5%)@NaYF4 nanoparticles as a promising fluorophore in the transparent anti-fake printing.Yingdong HanHongyu LiYangbo WangYue PanLing HuangFeng SongWei HuangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yingdong Han Hongyu Li Yangbo Wang Yue Pan Ling Huang Feng Song Wei Huang Upconversion Modulation through Pulsed Laser Excitation for Anti-counterfeiting
description	Abstract Lanthanide-doped upconversion nanomaterials are emerging as promising candidates in optoelectronics, volumetric display, anti-counterfeiting as well as biological imaging and therapy. Typical modulations of upconversion through chemical methods, such as controlling phase, composition, morphology and size enable us to rationally manipulate emission profiles and lifetimes of lanthanide ions by using continuous-wave laser excitation. Here we demonstrate that under pulsed laser excitation the emission color of NaYF4:Er/Tm (2/0.5%)@NaYF4 core-shell nanoparticles has an obvious transformation from green to red colors. Moreover, both pulse duration and repetition frequency are responsible for manipulating the upconversion emission color. The mechanism of the phenomena may be that the pulsed laser sequence triggers the emission levels to non-steady upconversion states first, and then cuts off the unfinished population process within the pulse duration. This pump source dependent and resultant tunable fluorescence emission enables NaYF4:Er/Tm (2/0.5%)@NaYF4 nanoparticles as a promising fluorophore in the transparent anti-fake printing.
format	article
author	Yingdong Han Hongyu Li Yangbo Wang Yue Pan Ling Huang Feng Song Wei Huang
author_facet	Yingdong Han Hongyu Li Yangbo Wang Yue Pan Ling Huang Feng Song Wei Huang
author_sort	Yingdong Han
title	Upconversion Modulation through Pulsed Laser Excitation for Anti-counterfeiting
title_short	Upconversion Modulation through Pulsed Laser Excitation for Anti-counterfeiting
title_full	Upconversion Modulation through Pulsed Laser Excitation for Anti-counterfeiting
title_fullStr	Upconversion Modulation through Pulsed Laser Excitation for Anti-counterfeiting
title_full_unstemmed	Upconversion Modulation through Pulsed Laser Excitation for Anti-counterfeiting
title_sort	upconversion modulation through pulsed laser excitation for anti-counterfeiting
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/0d29b1b1f617430f8a18e14fc3668c5b
work_keys_str_mv	AT yingdonghan upconversionmodulationthroughpulsedlaserexcitationforanticounterfeiting AT hongyuli upconversionmodulationthroughpulsedlaserexcitationforanticounterfeiting AT yangbowang upconversionmodulationthroughpulsedlaserexcitationforanticounterfeiting AT yuepan upconversionmodulationthroughpulsedlaserexcitationforanticounterfeiting AT linghuang upconversionmodulationthroughpulsedlaserexcitationforanticounterfeiting AT fengsong upconversionmodulationthroughpulsedlaserexcitationforanticounterfeiting AT weihuang upconversionmodulationthroughpulsedlaserexcitationforanticounterfeiting
_version_	1718384699215183872

Upconversion Modulation through Pulsed Laser Excitation for Anti-counterfeiting

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