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Laser Ablated Carbon Nanodots for Light Emission
The synthesis of fluorescent carbon dots-like nanostructures (CNDs) obtained through the laser ablation of a carbon solid target in liquid environment is reported. The ablation process was induced in acetone with laser pulses of 1064, 532, and 355 nm under different irradiation times. Close-spherica...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer US
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5033790/ https://www.ncbi.nlm.nih.gov/pubmed/27659953 http://dx.doi.org/10.1186/s11671-016-1638-8 |
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author | Reyes, Delfino Camacho, Marco Camacho, Miguel Mayorga, Miguel Weathers, Duncan Salamo, Greg Wang, Zhiming Neogi, Arup |
author_facet | Reyes, Delfino Camacho, Marco Camacho, Miguel Mayorga, Miguel Weathers, Duncan Salamo, Greg Wang, Zhiming Neogi, Arup |
author_sort | Reyes, Delfino |
collection | PubMed |
description | The synthesis of fluorescent carbon dots-like nanostructures (CNDs) obtained through the laser ablation of a carbon solid target in liquid environment is reported. The ablation process was induced in acetone with laser pulses of 1064, 532, and 355 nm under different irradiation times. Close-spherical amorphous CNDs with sizes between 5 and 20 nm, whose abundance strongly depends on the ablation parameters were investigated using electron microscopy and was confirmed using absorption and emission spectroscopies. The π- π* electronic transition at 3.76 eV dominates the absorption for all the CNDs species synthesized under different irradiation conditions. The light emission is most efficient due to excitation at 3.54 eV with the photoluminescence intensity centered at 3.23 eV. The light emission from the CNDs is most efficient due to ablation at 355 nm. The emission wavelength of the CNDs can be tuned from the near-UV to the green wavelength region by controlling the ablation time and modifying the ablation and excitation laser wavelength. |
format | Online Article Text |
id | pubmed-5033790 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Springer US |
record_format | MEDLINE/PubMed |
spelling | pubmed-50337902016-10-03 Laser Ablated Carbon Nanodots for Light Emission Reyes, Delfino Camacho, Marco Camacho, Miguel Mayorga, Miguel Weathers, Duncan Salamo, Greg Wang, Zhiming Neogi, Arup Nanoscale Res Lett Nano Express The synthesis of fluorescent carbon dots-like nanostructures (CNDs) obtained through the laser ablation of a carbon solid target in liquid environment is reported. The ablation process was induced in acetone with laser pulses of 1064, 532, and 355 nm under different irradiation times. Close-spherical amorphous CNDs with sizes between 5 and 20 nm, whose abundance strongly depends on the ablation parameters were investigated using electron microscopy and was confirmed using absorption and emission spectroscopies. The π- π* electronic transition at 3.76 eV dominates the absorption for all the CNDs species synthesized under different irradiation conditions. The light emission is most efficient due to excitation at 3.54 eV with the photoluminescence intensity centered at 3.23 eV. The light emission from the CNDs is most efficient due to ablation at 355 nm. The emission wavelength of the CNDs can be tuned from the near-UV to the green wavelength region by controlling the ablation time and modifying the ablation and excitation laser wavelength. Springer US 2016-09-22 /pmc/articles/PMC5033790/ /pubmed/27659953 http://dx.doi.org/10.1186/s11671-016-1638-8 Text en © The Author(s). 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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. |
spellingShingle | Nano Express Reyes, Delfino Camacho, Marco Camacho, Miguel Mayorga, Miguel Weathers, Duncan Salamo, Greg Wang, Zhiming Neogi, Arup Laser Ablated Carbon Nanodots for Light Emission |
title | Laser Ablated Carbon Nanodots for Light Emission |
title_full | Laser Ablated Carbon Nanodots for Light Emission |
title_fullStr | Laser Ablated Carbon Nanodots for Light Emission |
title_full_unstemmed | Laser Ablated Carbon Nanodots for Light Emission |
title_short | Laser Ablated Carbon Nanodots for Light Emission |
title_sort | laser ablated carbon nanodots for light emission |
topic | Nano Express |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5033790/ https://www.ncbi.nlm.nih.gov/pubmed/27659953 http://dx.doi.org/10.1186/s11671-016-1638-8 |
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