Optoelectronic Properties of Atomically Thin Mo<sub><i>x</i></sub>W<sub>(1−<i>x</i>)</sub>S<sub>2</sub> Nanoflakes Probed by Spatially-Resolved Monochromated EELS
Band gap engineering of atomically thin two-dimensional (2D) materials has attracted a huge amount of interest as a key aspect to the application of these materials in nanooptoelectronics and nanophotonics. Low-loss electron energy loss spectroscopy has been employed to perform a direct measurement...
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MDPI AG
2021-11-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/12/3218 |
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| author | Mario Pelaez-Fernandez Yung-Chang Lin Kazu Suenaga Raul Arenal |
| author_facet | Mario Pelaez-Fernandez Yung-Chang Lin Kazu Suenaga Raul Arenal |
| author_sort | Mario Pelaez-Fernandez |
| collection | DOAJ |
| description | Band gap engineering of atomically thin two-dimensional (2D) materials has attracted a huge amount of interest as a key aspect to the application of these materials in nanooptoelectronics and nanophotonics. Low-loss electron energy loss spectroscopy has been employed to perform a direct measurement of the band gap in atomically thin Mo<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mi>x</mi></msub></semantics></math></inline-formula>W<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mrow><mo>(</mo><mn>1</mn><mo>−</mo><mi>x</mi><mo>)</mo></mrow></msub></semantics></math></inline-formula>S<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> nanoflakes. The results show a bowing effect with the alloying degree, which fits previous studies focused on excitonic transitions. Additional properties regarding the Van Hove singularities in the density of states of these materials, as well as high energy excitonic transition, have been analysed as well. |
| first_indexed | 2024-03-10T03:27:20Z |
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| id | doaj.art-703498016204493ab26f3b4e1e41412e |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T03:27:20Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
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| series | Nanomaterials |
| spelling | doaj.art-703498016204493ab26f3b4e1e41412e2023-11-23T09:49:31ZengMDPI AGNanomaterials2079-49912021-11-011112321810.3390/nano11123218Optoelectronic Properties of Atomically Thin Mo<sub><i>x</i></sub>W<sub>(1−<i>x</i>)</sub>S<sub>2</sub> Nanoflakes Probed by Spatially-Resolved Monochromated EELSMario Pelaez-Fernandez0Yung-Chang Lin1Kazu Suenaga2Raul Arenal3Instituto de Nanociencia y Materiales de Aragon (INMA), CSIC-U. de Zaragoza, Calle Pedro Cerbuna 12, 50009 Zaragoza, SpainNational Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8565, JapanThe Institute of Scientific and Industrial Research (ISIR-SANKEN), Osaka University, Osaka 567-0047, JapanInstituto de Nanociencia y Materiales de Aragon (INMA), CSIC-U. de Zaragoza, Calle Pedro Cerbuna 12, 50009 Zaragoza, SpainBand gap engineering of atomically thin two-dimensional (2D) materials has attracted a huge amount of interest as a key aspect to the application of these materials in nanooptoelectronics and nanophotonics. Low-loss electron energy loss spectroscopy has been employed to perform a direct measurement of the band gap in atomically thin Mo<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mi>x</mi></msub></semantics></math></inline-formula>W<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mrow><mo>(</mo><mn>1</mn><mo>−</mo><mi>x</mi><mo>)</mo></mrow></msub></semantics></math></inline-formula>S<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> nanoflakes. The results show a bowing effect with the alloying degree, which fits previous studies focused on excitonic transitions. Additional properties regarding the Van Hove singularities in the density of states of these materials, as well as high energy excitonic transition, have been analysed as well.https://www.mdpi.com/2079-4991/11/12/3218band gap measurementband gap engineeringoptoelectronicsEELStransition metal dichalcogenides2D materials |
| spellingShingle | Mario Pelaez-Fernandez Yung-Chang Lin Kazu Suenaga Raul Arenal Optoelectronic Properties of Atomically Thin Mo<sub><i>x</i></sub>W<sub>(1−<i>x</i>)</sub>S<sub>2</sub> Nanoflakes Probed by Spatially-Resolved Monochromated EELS Nanomaterials band gap measurement band gap engineering optoelectronics EELS transition metal dichalcogenides 2D materials |
| title | Optoelectronic Properties of Atomically Thin Mo<sub><i>x</i></sub>W<sub>(1−<i>x</i>)</sub>S<sub>2</sub> Nanoflakes Probed by Spatially-Resolved Monochromated EELS |
| title_full | Optoelectronic Properties of Atomically Thin Mo<sub><i>x</i></sub>W<sub>(1−<i>x</i>)</sub>S<sub>2</sub> Nanoflakes Probed by Spatially-Resolved Monochromated EELS |
| title_fullStr | Optoelectronic Properties of Atomically Thin Mo<sub><i>x</i></sub>W<sub>(1−<i>x</i>)</sub>S<sub>2</sub> Nanoflakes Probed by Spatially-Resolved Monochromated EELS |
| title_full_unstemmed | Optoelectronic Properties of Atomically Thin Mo<sub><i>x</i></sub>W<sub>(1−<i>x</i>)</sub>S<sub>2</sub> Nanoflakes Probed by Spatially-Resolved Monochromated EELS |
| title_short | Optoelectronic Properties of Atomically Thin Mo<sub><i>x</i></sub>W<sub>(1−<i>x</i>)</sub>S<sub>2</sub> Nanoflakes Probed by Spatially-Resolved Monochromated EELS |
| title_sort | optoelectronic properties of atomically thin mo sub i x i sub w sub 1 i x i sub s sub 2 sub nanoflakes probed by spatially resolved monochromated eels |
| topic | band gap measurement band gap engineering optoelectronics EELS transition metal dichalcogenides 2D materials |
| url | https://www.mdpi.com/2079-4991/11/12/3218 |
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