Optical Response of CVD-Grown ML-WS<sub>2</sub> Flakes on an Ultra-Dense Au NP Plasmonic Array
The combination of metallic nanostructures with two-dimensional transition metal dichalcogenides is an efficient way to make the optical properties of the latter more appealing for opto-electronic applications. In this work, we investigate the optical properties of monolayer WS<inline-formula>...
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MDPI AG
2022-03-01
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| Series: | Chemosensors |
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| Online Access: | https://www.mdpi.com/2227-9040/10/3/120 |
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| author | Marzia Ferrera Lorenzo Ramò Domenica Convertino Giorgio Orlandini Simona Pace Ilya Milekhin Michele Magnozzi Mahfujur Rahaman Dietrich R. T. Zahn Camilla Coletti Maurizio Canepa Francesco Bisio |
| author_facet | Marzia Ferrera Lorenzo Ramò Domenica Convertino Giorgio Orlandini Simona Pace Ilya Milekhin Michele Magnozzi Mahfujur Rahaman Dietrich R. T. Zahn Camilla Coletti Maurizio Canepa Francesco Bisio |
| author_sort | Marzia Ferrera |
| collection | DOAJ |
| description | The combination of metallic nanostructures with two-dimensional transition metal dichalcogenides is an efficient way to make the optical properties of the latter more appealing for opto-electronic applications. In this work, we investigate the optical properties of monolayer WS<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math></inline-formula> flakes grown by chemical vapour deposition and transferred onto a densely-packed array of plasmonic Au nanoparticles (NPs). The optical response was measured as a function of the thickness of a dielectric spacer intercalated between the two materials and of the system temperature, in the 75–350 K range. We show that a weak interaction is established between WS<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math></inline-formula> and Au NPs, leading to temperature- and spacer-thickness-dependent coupling between the localized surface plasmon resonance of Au NPs and the WS<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math></inline-formula> exciton. We suggest that the closely-packed morphology of the plasmonic array promotes a high confinement of the electromagnetic field in regions inaccessible by the WS<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math></inline-formula> deposited on top. This allows the achievement of direct contact between WS<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math></inline-formula> and Au while preserving a strong connotation of the properties of the two materials also in the hybrid system. |
| first_indexed | 2024-03-09T19:59:45Z |
| format | Article |
| id | doaj.art-31ddf892b8a2422792cbf998436752fa |
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| language | English |
| last_indexed | 2024-03-09T19:59:45Z |
| publishDate | 2022-03-01 |
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| spelling | doaj.art-31ddf892b8a2422792cbf998436752fa2023-11-24T00:46:09ZengMDPI AGChemosensors2227-90402022-03-0110312010.3390/chemosensors10030120Optical Response of CVD-Grown ML-WS<sub>2</sub> Flakes on an Ultra-Dense Au NP Plasmonic ArrayMarzia Ferrera0Lorenzo Ramò1Domenica Convertino2Giorgio Orlandini3Simona Pace4Ilya Milekhin5Michele Magnozzi6Mahfujur Rahaman7Dietrich R. T. Zahn8Camilla Coletti9Maurizio Canepa10Francesco Bisio11OptMatLab, Department of Physics, University of Genova, Via Dodecaneso 33, 16146 Genova, ItalyOptMatLab, Department of Physics, University of Genova, Via Dodecaneso 33, 16146 Genova, ItalyCenter for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, 56127 Pisa, ItalyCenter for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, 56127 Pisa, ItalyCenter for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, 56127 Pisa, ItalyInstitute of Physics, Chemnitz University of Technology, Reichenhainer Str. 70, 09126 Chemnitz, GermanyOptMatLab, Department of Physics, University of Genova, Via Dodecaneso 33, 16146 Genova, ItalyInstitute of Physics, Chemnitz University of Technology, Reichenhainer Str. 70, 09126 Chemnitz, GermanyInstitute of Physics, Chemnitz University of Technology, Reichenhainer Str. 70, 09126 Chemnitz, GermanyCenter for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, 56127 Pisa, ItalyOptMatLab, Department of Physics, University of Genova, Via Dodecaneso 33, 16146 Genova, ItalyConsiglio Nazionale delle Ricerche—SuPerconducting and Other INnovative Materials and Devices Institute (CNR-SPIN), C.so Perrone 24, 16152 Genova, ItalyThe combination of metallic nanostructures with two-dimensional transition metal dichalcogenides is an efficient way to make the optical properties of the latter more appealing for opto-electronic applications. In this work, we investigate the optical properties of monolayer WS<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math></inline-formula> flakes grown by chemical vapour deposition and transferred onto a densely-packed array of plasmonic Au nanoparticles (NPs). The optical response was measured as a function of the thickness of a dielectric spacer intercalated between the two materials and of the system temperature, in the 75–350 K range. We show that a weak interaction is established between WS<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math></inline-formula> and Au NPs, leading to temperature- and spacer-thickness-dependent coupling between the localized surface plasmon resonance of Au NPs and the WS<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math></inline-formula> exciton. We suggest that the closely-packed morphology of the plasmonic array promotes a high confinement of the electromagnetic field in regions inaccessible by the WS<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math></inline-formula> deposited on top. This allows the achievement of direct contact between WS<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math></inline-formula> and Au while preserving a strong connotation of the properties of the two materials also in the hybrid system.https://www.mdpi.com/2227-9040/10/3/120plasmonics2D materialshybrid systemsmicro-optical spectroscopies |
| spellingShingle | Marzia Ferrera Lorenzo Ramò Domenica Convertino Giorgio Orlandini Simona Pace Ilya Milekhin Michele Magnozzi Mahfujur Rahaman Dietrich R. T. Zahn Camilla Coletti Maurizio Canepa Francesco Bisio Optical Response of CVD-Grown ML-WS<sub>2</sub> Flakes on an Ultra-Dense Au NP Plasmonic Array Chemosensors plasmonics 2D materials hybrid systems micro-optical spectroscopies |
| title | Optical Response of CVD-Grown ML-WS<sub>2</sub> Flakes on an Ultra-Dense Au NP Plasmonic Array |
| title_full | Optical Response of CVD-Grown ML-WS<sub>2</sub> Flakes on an Ultra-Dense Au NP Plasmonic Array |
| title_fullStr | Optical Response of CVD-Grown ML-WS<sub>2</sub> Flakes on an Ultra-Dense Au NP Plasmonic Array |
| title_full_unstemmed | Optical Response of CVD-Grown ML-WS<sub>2</sub> Flakes on an Ultra-Dense Au NP Plasmonic Array |
| title_short | Optical Response of CVD-Grown ML-WS<sub>2</sub> Flakes on an Ultra-Dense Au NP Plasmonic Array |
| title_sort | optical response of cvd grown ml ws sub 2 sub flakes on an ultra dense au np plasmonic array |
| topic | plasmonics 2D materials hybrid systems micro-optical spectroscopies |
| url | https://www.mdpi.com/2227-9040/10/3/120 |
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