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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Formato: | Online Artículo Texto |
Lenguaje: | English |
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RSC
2020
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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. |
format | Online Article Text |
id | pubmed-9417700 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | RSC |
record_format | MEDLINE/PubMed |
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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