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Photoluminescence enhancement of monolayer MoS(2) using plasmonic gallium nanoparticles

2D monolayer molybdenum disulphide (MoS(2)) has been the focus of intense research due to its direct bandgap compared with the indirect bandgap of its bulk counterpart; however its photoluminescence (PL) intensity is limited due to its low absorption efficiency. Herein, we use gallium hemispherical...

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Autores principales: Catalán-Gómez, Sergio, Garg, Sourav, Redondo-Cubero, Andrés, Gordillo, Nuria, de Andrés, Alicia, Nucciarelli, Flavio, Kim, Seonsing, Kung, Patrick, Pau, Jose Luis
Formato: Online Artículo Texto
Lenguaje:English
Publicado: RSC 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9473177/
https://www.ncbi.nlm.nih.gov/pubmed/36132234
http://dx.doi.org/10.1039/c8na00094h
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author Catalán-Gómez, Sergio
Garg, Sourav
Redondo-Cubero, Andrés
Gordillo, Nuria
de Andrés, Alicia
Nucciarelli, Flavio
Kim, Seonsing
Kung, Patrick
Pau, Jose Luis
author_facet Catalán-Gómez, Sergio
Garg, Sourav
Redondo-Cubero, Andrés
Gordillo, Nuria
de Andrés, Alicia
Nucciarelli, Flavio
Kim, Seonsing
Kung, Patrick
Pau, Jose Luis
author_sort Catalán-Gómez, Sergio
collection PubMed
description 2D monolayer molybdenum disulphide (MoS(2)) has been the focus of intense research due to its direct bandgap compared with the indirect bandgap of its bulk counterpart; however its photoluminescence (PL) intensity is limited due to its low absorption efficiency. Herein, we use gallium hemispherical nanoparticles (Ga NPs) deposited by thermal evaporation on top of chemical vapour deposited MoS(2) monolayers in order to enhance its luminescence. The influence of the NP radius and the laser wavelength is reported in PL and Raman experiments. In addition, the physics behind the PL enhancement factor is investigated. The results indicate that the prominent enhancement is caused by the localized surface plasmon resonance of the Ga NPs induced by a charge transfer phenomenon. This work sheds light on the use of alternative metals, besides silver and gold, for the improvement of MoS(2) luminescence.
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spelling pubmed-94731772022-09-20 Photoluminescence enhancement of monolayer MoS(2) using plasmonic gallium nanoparticles Catalán-Gómez, Sergio Garg, Sourav Redondo-Cubero, Andrés Gordillo, Nuria de Andrés, Alicia Nucciarelli, Flavio Kim, Seonsing Kung, Patrick Pau, Jose Luis Nanoscale Adv Chemistry 2D monolayer molybdenum disulphide (MoS(2)) has been the focus of intense research due to its direct bandgap compared with the indirect bandgap of its bulk counterpart; however its photoluminescence (PL) intensity is limited due to its low absorption efficiency. Herein, we use gallium hemispherical nanoparticles (Ga NPs) deposited by thermal evaporation on top of chemical vapour deposited MoS(2) monolayers in order to enhance its luminescence. The influence of the NP radius and the laser wavelength is reported in PL and Raman experiments. In addition, the physics behind the PL enhancement factor is investigated. The results indicate that the prominent enhancement is caused by the localized surface plasmon resonance of the Ga NPs induced by a charge transfer phenomenon. This work sheds light on the use of alternative metals, besides silver and gold, for the improvement of MoS(2) luminescence. RSC 2018-11-22 /pmc/articles/PMC9473177/ /pubmed/36132234 http://dx.doi.org/10.1039/c8na00094h Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Catalán-Gómez, Sergio
Garg, Sourav
Redondo-Cubero, Andrés
Gordillo, Nuria
de Andrés, Alicia
Nucciarelli, Flavio
Kim, Seonsing
Kung, Patrick
Pau, Jose Luis
Photoluminescence enhancement of monolayer MoS(2) using plasmonic gallium nanoparticles
title Photoluminescence enhancement of monolayer MoS(2) using plasmonic gallium nanoparticles
title_full Photoluminescence enhancement of monolayer MoS(2) using plasmonic gallium nanoparticles
title_fullStr Photoluminescence enhancement of monolayer MoS(2) using plasmonic gallium nanoparticles
title_full_unstemmed Photoluminescence enhancement of monolayer MoS(2) using plasmonic gallium nanoparticles
title_short Photoluminescence enhancement of monolayer MoS(2) using plasmonic gallium nanoparticles
title_sort photoluminescence enhancement of monolayer mos(2) using plasmonic gallium nanoparticles
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9473177/
https://www.ncbi.nlm.nih.gov/pubmed/36132234
http://dx.doi.org/10.1039/c8na00094h
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