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Tunable direct band gap photoluminescent organic semiconducting nanoparticles from lignite

Fluorescent organic semiconducting dots (OSDs) with tunable particle size and surface functionality are synthesized from lignite by chemical oxidation method followed by ultra-sonication techniques and dialysis. The defects and oxygen functionalities play a vital role in the photoluminescent propert...

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Detalles Bibliográficos
Autores principales: B, Manoj, Raj, Ashlin M, Chirayil, George Thomas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5740083/
https://www.ncbi.nlm.nih.gov/pubmed/29269774
http://dx.doi.org/10.1038/s41598-017-18338-2
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author B, Manoj
Raj, Ashlin M
Chirayil, George Thomas
author_facet B, Manoj
Raj, Ashlin M
Chirayil, George Thomas
author_sort B, Manoj
collection PubMed
description Fluorescent organic semiconducting dots (OSDs) with tunable particle size and surface functionality are synthesized from lignite by chemical oxidation method followed by ultra-sonication techniques and dialysis. The defects and oxygen functionalities play a vital role in the photoluminescent property of the synthesized nanoparticles along with quantum confinement effect. These nanomaterials are suitable for imaging and chemical sensing applications as there is no photobleaching and quenching even after a continuous UV exposure of 24 hours and storage of 2 years. The excellent excitation dependent luminescence of the synthesized carbon dots can be utilized for making a low-cost carbon-based sensor for Cu(2+) metal ions sensing. The OSDs show good ratiometric fluorescent sensing and can be used as a reliable probe for the detection of Cu(2+) ions. They exhibit excellent detection limit of copper ion in acidic solution to a very low concentration of 0.0089 nM. The fluorescent nanodots synthesized from such an abundant and cost-effective precursor exhibiting high copper ion sensitivity is being reported for the first time.
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spelling pubmed-57400832018-01-03 Tunable direct band gap photoluminescent organic semiconducting nanoparticles from lignite B, Manoj Raj, Ashlin M Chirayil, George Thomas Sci Rep Article Fluorescent organic semiconducting dots (OSDs) with tunable particle size and surface functionality are synthesized from lignite by chemical oxidation method followed by ultra-sonication techniques and dialysis. The defects and oxygen functionalities play a vital role in the photoluminescent property of the synthesized nanoparticles along with quantum confinement effect. These nanomaterials are suitable for imaging and chemical sensing applications as there is no photobleaching and quenching even after a continuous UV exposure of 24 hours and storage of 2 years. The excellent excitation dependent luminescence of the synthesized carbon dots can be utilized for making a low-cost carbon-based sensor for Cu(2+) metal ions sensing. The OSDs show good ratiometric fluorescent sensing and can be used as a reliable probe for the detection of Cu(2+) ions. They exhibit excellent detection limit of copper ion in acidic solution to a very low concentration of 0.0089 nM. The fluorescent nanodots synthesized from such an abundant and cost-effective precursor exhibiting high copper ion sensitivity is being reported for the first time. Nature Publishing Group UK 2017-12-21 /pmc/articles/PMC5740083/ /pubmed/29269774 http://dx.doi.org/10.1038/s41598-017-18338-2 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
B, Manoj
Raj, Ashlin M
Chirayil, George Thomas
Tunable direct band gap photoluminescent organic semiconducting nanoparticles from lignite
title Tunable direct band gap photoluminescent organic semiconducting nanoparticles from lignite
title_full Tunable direct band gap photoluminescent organic semiconducting nanoparticles from lignite
title_fullStr Tunable direct band gap photoluminescent organic semiconducting nanoparticles from lignite
title_full_unstemmed Tunable direct band gap photoluminescent organic semiconducting nanoparticles from lignite
title_short Tunable direct band gap photoluminescent organic semiconducting nanoparticles from lignite
title_sort tunable direct band gap photoluminescent organic semiconducting nanoparticles from lignite
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5740083/
https://www.ncbi.nlm.nih.gov/pubmed/29269774
http://dx.doi.org/10.1038/s41598-017-18338-2
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