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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2017-05-01
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Online Access: | https://doi.org/10.1038/s41598-017-01611-9 |
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doaj-0d29b1b1f617430f8a18e14fc3668c5b2020-12-08T03:18:57ZengNature Publishing GroupScientific Reports2045-23222017-05-01711810.1038/s41598-017-01611-9Upconversion Modulation through Pulsed Laser Excitation for Anti-counterfeitingYingdong Han0Hongyu Li1Yangbo Wang2Yue Pan3Ling Huang4Feng Song5Wei Huang6School of Physics & The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Nankai UniversityKey Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech)Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech)School of Chemistry and Chemical Engineering, Inner Mongolia UniversityKey Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech)School of Physics & The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Nankai UniversitySchool of Physics & The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Nankai UniversityAbstract 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.https://doi.org/10.1038/s41598-017-01611-9 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yingdong Han Hongyu Li Yangbo Wang Yue Pan Ling Huang Feng Song Wei Huang |
spellingShingle |
Yingdong Han Hongyu Li Yangbo Wang Yue Pan Ling Huang Feng Song Wei Huang Upconversion Modulation through Pulsed Laser Excitation for Anti-counterfeiting Scientific Reports |
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 Publishing Group |
series |
Scientific Reports |
issn |
2045-2322 |
publishDate |
2017-05-01 |
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. |
url |
https://doi.org/10.1038/s41598-017-01611-9 |
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