Phosphorescent MoS(2) quantum dots as a temperature sensor and security ink

Currently, few phosphorescent materials (PMs) possess a long phosphorescence lasting time and have potential for application in chemical sensors. Herein, we disclose that the incorporation of few-layer molybdenum disulfide quantum dots (FL-MoS(2) QDs) into poly(vinyl alcohol) (PVA) matrices leads to...

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Autores principales: Madhu, Manivannan, Lu, Chi-Yu, Tseng, Wei-Lung
Formato: Online Artículo Texto
Lenguaje:English
Publicado: RSC 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9417700/
https://www.ncbi.nlm.nih.gov/pubmed/36133843
http://dx.doi.org/10.1039/d0na00730g
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author Madhu, Manivannan
Lu, Chi-Yu
Tseng, Wei-Lung
author_facet Madhu, Manivannan
Lu, Chi-Yu
Tseng, Wei-Lung
author_sort Madhu, Manivannan
collection PubMed
description Currently, few phosphorescent materials (PMs) possess a long phosphorescence lasting time and have potential for application in chemical sensors. Herein, we disclose that the incorporation of few-layer molybdenum disulfide quantum dots (FL-MoS(2) QDs) into poly(vinyl alcohol) (PVA) matrices leads to the emission of bright green phosphorescence with a long lasting time of 3.0 s and a phosphorescence quantum yield of 20%. This enhanced phosphorescence originates from the formation of O–H⋯S hydrogen bonding networks between the rich sulfur sites of the FL-MoS(2) QDs and the hydroxyl groups of the PVA molecules, which not only rigidifies the vibration modes of the FL-MoS(2) QDs but also provides an oxygen barrier. Further investigations reveal that the FL-MoS(2) QD/PVA composites exhibit a longer phosphorescence lasting time than N,S-doped carbon dots, few layer tungsten disulfide quantum dots, Rhodamine 6G, and Rhodamine B in PVA matrices. Since heat efficiently induced the removal of water moisture from PVA matrices, the FL-MoS(2) QD/PVA composites could be implemented for phosphorescence turn-on and naked-eye detection of temperature variations ranging from 30 to 70 °C. By contrast, the carbon dot/PVA composites were incapable of sensing environmental temperature due to their weak hydrogen bonding with the hydroxyl groups of PVA matrices. Additionally, this study reveals the potential of the FL-MoS(2) QD/PVA composites as an advanced security ink for anti-counterfeiting and encryption applications. The given results could open a new direction for potential application of two-dimensional quantum dots in phosphorescence-based sensors and security inks.
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spelling pubmed-94177002022-09-20 Phosphorescent MoS(2) quantum dots as a temperature sensor and security ink Madhu, Manivannan Lu, Chi-Yu Tseng, Wei-Lung Nanoscale Adv Chemistry Currently, few phosphorescent materials (PMs) possess a long phosphorescence lasting time and have potential for application in chemical sensors. Herein, we disclose that the incorporation of few-layer molybdenum disulfide quantum dots (FL-MoS(2) QDs) into poly(vinyl alcohol) (PVA) matrices leads to the emission of bright green phosphorescence with a long lasting time of 3.0 s and a phosphorescence quantum yield of 20%. This enhanced phosphorescence originates from the formation of O–H⋯S hydrogen bonding networks between the rich sulfur sites of the FL-MoS(2) QDs and the hydroxyl groups of the PVA molecules, which not only rigidifies the vibration modes of the FL-MoS(2) QDs but also provides an oxygen barrier. Further investigations reveal that the FL-MoS(2) QD/PVA composites exhibit a longer phosphorescence lasting time than N,S-doped carbon dots, few layer tungsten disulfide quantum dots, Rhodamine 6G, and Rhodamine B in PVA matrices. Since heat efficiently induced the removal of water moisture from PVA matrices, the FL-MoS(2) QD/PVA composites could be implemented for phosphorescence turn-on and naked-eye detection of temperature variations ranging from 30 to 70 °C. By contrast, the carbon dot/PVA composites were incapable of sensing environmental temperature due to their weak hydrogen bonding with the hydroxyl groups of PVA matrices. Additionally, this study reveals the potential of the FL-MoS(2) QD/PVA composites as an advanced security ink for anti-counterfeiting and encryption applications. The given results could open a new direction for potential application of two-dimensional quantum dots in phosphorescence-based sensors and security inks. RSC 2020-11-10 /pmc/articles/PMC9417700/ /pubmed/36133843 http://dx.doi.org/10.1039/d0na00730g Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Madhu, Manivannan
Lu, Chi-Yu
Tseng, Wei-Lung
Phosphorescent MoS(2) quantum dots as a temperature sensor and security ink
title Phosphorescent MoS(2) quantum dots as a temperature sensor and security ink
title_full Phosphorescent MoS(2) quantum dots as a temperature sensor and security ink
title_fullStr Phosphorescent MoS(2) quantum dots as a temperature sensor and security ink
title_full_unstemmed Phosphorescent MoS(2) quantum dots as a temperature sensor and security ink
title_short Phosphorescent MoS(2) quantum dots as a temperature sensor and security ink
title_sort phosphorescent mos(2) quantum dots as a temperature sensor and security ink
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9417700/
https://www.ncbi.nlm.nih.gov/pubmed/36133843
http://dx.doi.org/10.1039/d0na00730g
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