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Broadband Visible Nonlinear Absorption and Ultrafast Dynamics of the Ti(3)C(2) Nanosheet
The Ti(3)C(2) nanosheet, as a new two-dimensional (2D) group, has been found to have attractive characteristics as material for electromagnetic shielding and energy storage. In this study, the nonlinear broadband absorption and ultrafast dynamics of the Ti(3)C(2) nanosheet were investigated using na...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7767056/ https://www.ncbi.nlm.nih.gov/pubmed/33348761 http://dx.doi.org/10.3390/nano10122544 |
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author | Shao, Yabin Chen, Chen He, Qing Wu, Wenzhi Li, Chensha Gao, Yachen |
author_facet | Shao, Yabin Chen, Chen He, Qing Wu, Wenzhi Li, Chensha Gao, Yachen |
author_sort | Shao, Yabin |
collection | PubMed |
description | The Ti(3)C(2) nanosheet, as a new two-dimensional (2D) group, has been found to have attractive characteristics as material for electromagnetic shielding and energy storage. In this study, the nonlinear broadband absorption and ultrafast dynamics of the Ti(3)C(2) nanosheet were investigated using nanosecond open-aperture Z-scan and transient absorption techniques. The mechanism of two-photon absorption (TPA) was revealed in the visible region (475–700 nm). At lower incident energies, nonlinear absorption could not happen. When the laser energy increased to 0.64 GW/cm(2), electrons in the valence band could absorb two photons and jump to the conduction band, with TPA occurring, which meant that the sample exhibited reverse saturable absorption (RSA). In addition, when transient absorption was used to investigate the ultrafast carrier dynamics of the sample, it demonstrated that the relaxation contains a fast decay component and a slow one, which are obtained from electron–phonon and phonon–phonon interactions, respectively. Moreover, with the increasing pump fluence, the fast decay lifetime τ(1) increased from 3.9 to 4.5 ps, and the slow one τ(2) increased from 11.1 to 13.2 ps. These results show that the Ti(3)C(2) nanosheet has potential applications in broadband optical limiters. |
format | Online Article Text |
id | pubmed-7767056 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-77670562020-12-28 Broadband Visible Nonlinear Absorption and Ultrafast Dynamics of the Ti(3)C(2) Nanosheet Shao, Yabin Chen, Chen He, Qing Wu, Wenzhi Li, Chensha Gao, Yachen Nanomaterials (Basel) Article The Ti(3)C(2) nanosheet, as a new two-dimensional (2D) group, has been found to have attractive characteristics as material for electromagnetic shielding and energy storage. In this study, the nonlinear broadband absorption and ultrafast dynamics of the Ti(3)C(2) nanosheet were investigated using nanosecond open-aperture Z-scan and transient absorption techniques. The mechanism of two-photon absorption (TPA) was revealed in the visible region (475–700 nm). At lower incident energies, nonlinear absorption could not happen. When the laser energy increased to 0.64 GW/cm(2), electrons in the valence band could absorb two photons and jump to the conduction band, with TPA occurring, which meant that the sample exhibited reverse saturable absorption (RSA). In addition, when transient absorption was used to investigate the ultrafast carrier dynamics of the sample, it demonstrated that the relaxation contains a fast decay component and a slow one, which are obtained from electron–phonon and phonon–phonon interactions, respectively. Moreover, with the increasing pump fluence, the fast decay lifetime τ(1) increased from 3.9 to 4.5 ps, and the slow one τ(2) increased from 11.1 to 13.2 ps. These results show that the Ti(3)C(2) nanosheet has potential applications in broadband optical limiters. MDPI 2020-12-17 /pmc/articles/PMC7767056/ /pubmed/33348761 http://dx.doi.org/10.3390/nano10122544 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Shao, Yabin Chen, Chen He, Qing Wu, Wenzhi Li, Chensha Gao, Yachen Broadband Visible Nonlinear Absorption and Ultrafast Dynamics of the Ti(3)C(2) Nanosheet |
title | Broadband Visible Nonlinear Absorption and Ultrafast Dynamics of the Ti(3)C(2) Nanosheet |
title_full | Broadband Visible Nonlinear Absorption and Ultrafast Dynamics of the Ti(3)C(2) Nanosheet |
title_fullStr | Broadband Visible Nonlinear Absorption and Ultrafast Dynamics of the Ti(3)C(2) Nanosheet |
title_full_unstemmed | Broadband Visible Nonlinear Absorption and Ultrafast Dynamics of the Ti(3)C(2) Nanosheet |
title_short | Broadband Visible Nonlinear Absorption and Ultrafast Dynamics of the Ti(3)C(2) Nanosheet |
title_sort | broadband visible nonlinear absorption and ultrafast dynamics of the ti(3)c(2) nanosheet |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7767056/ https://www.ncbi.nlm.nih.gov/pubmed/33348761 http://dx.doi.org/10.3390/nano10122544 |
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