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Optically Induced Field-Emission Source Based on Aligned Vertical Carbon Nanotube Arrays

Due to the high field enhancement factor and photon-absorption efficiency, carbon nanotubes (CNTs) have been widely used in optically induced field-emission as a cathode. Here, we report vertical carbon nanotube arrays (VCNTAs) that performed as high-density electron sources. A combination of high a...

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Detalles Bibliográficos
Autores principales: Li, Mengjie, Wang, Qilong, Xu, Ji, Zhang, Jian, Qi, Zhiyang, Zhang, Xiaobing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8308351/
https://www.ncbi.nlm.nih.gov/pubmed/34361196
http://dx.doi.org/10.3390/nano11071810
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author Li, Mengjie
Wang, Qilong
Xu, Ji
Zhang, Jian
Qi, Zhiyang
Zhang, Xiaobing
author_facet Li, Mengjie
Wang, Qilong
Xu, Ji
Zhang, Jian
Qi, Zhiyang
Zhang, Xiaobing
author_sort Li, Mengjie
collection PubMed
description Due to the high field enhancement factor and photon-absorption efficiency, carbon nanotubes (CNTs) have been widely used in optically induced field-emission as a cathode. Here, we report vertical carbon nanotube arrays (VCNTAs) that performed as high-density electron sources. A combination of high applied electric field and laser illumination made it possible to modulate the emission with laser pulses. When the bias electric field and laser power density increased, the emission process is sensitive to a power law of the laser intensity, which supports the emission mechanism of optically induced field emission followed by over-the-barrier emission. Furthermore, we determine a polarization dependence that exhibits a cosine behavior, which verifies the high possibility of optically induced field emission.
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spelling pubmed-83083512021-07-25 Optically Induced Field-Emission Source Based on Aligned Vertical Carbon Nanotube Arrays Li, Mengjie Wang, Qilong Xu, Ji Zhang, Jian Qi, Zhiyang Zhang, Xiaobing Nanomaterials (Basel) Article Due to the high field enhancement factor and photon-absorption efficiency, carbon nanotubes (CNTs) have been widely used in optically induced field-emission as a cathode. Here, we report vertical carbon nanotube arrays (VCNTAs) that performed as high-density electron sources. A combination of high applied electric field and laser illumination made it possible to modulate the emission with laser pulses. When the bias electric field and laser power density increased, the emission process is sensitive to a power law of the laser intensity, which supports the emission mechanism of optically induced field emission followed by over-the-barrier emission. Furthermore, we determine a polarization dependence that exhibits a cosine behavior, which verifies the high possibility of optically induced field emission. MDPI 2021-07-12 /pmc/articles/PMC8308351/ /pubmed/34361196 http://dx.doi.org/10.3390/nano11071810 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Li, Mengjie
Wang, Qilong
Xu, Ji
Zhang, Jian
Qi, Zhiyang
Zhang, Xiaobing
Optically Induced Field-Emission Source Based on Aligned Vertical Carbon Nanotube Arrays
title Optically Induced Field-Emission Source Based on Aligned Vertical Carbon Nanotube Arrays
title_full Optically Induced Field-Emission Source Based on Aligned Vertical Carbon Nanotube Arrays
title_fullStr Optically Induced Field-Emission Source Based on Aligned Vertical Carbon Nanotube Arrays
title_full_unstemmed Optically Induced Field-Emission Source Based on Aligned Vertical Carbon Nanotube Arrays
title_short Optically Induced Field-Emission Source Based on Aligned Vertical Carbon Nanotube Arrays
title_sort optically induced field-emission source based on aligned vertical carbon nanotube arrays
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8308351/
https://www.ncbi.nlm.nih.gov/pubmed/34361196
http://dx.doi.org/10.3390/nano11071810
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AT zhangjian opticallyinducedfieldemissionsourcebasedonalignedverticalcarbonnanotubearrays
AT qizhiyang opticallyinducedfieldemissionsourcebasedonalignedverticalcarbonnanotubearrays
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