Photoacoustic spectroscopy of layered crystals: An enhancement of the photoacoustic signal and its analysis from the perspective of heat generation
Photoacoustic spectroscopy is a powerful tool for investigating semiconductors and determining some of their basic properties. However, generating a signal that is large enough for the investigated samples is still challenging. To address this, the focus is on enhancing photoacoustic (PA) signal int...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-02-01
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| Series: | Photoacoustics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213597924000855 |
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| author | Kamil Misztal Jan Kopaczek Robert Kudrawiec |
| author_facet | Kamil Misztal Jan Kopaczek Robert Kudrawiec |
| author_sort | Kamil Misztal |
| collection | DOAJ |
| description | Photoacoustic spectroscopy is a powerful tool for investigating semiconductors and determining some of their basic properties. However, generating a signal that is large enough for the investigated samples is still challenging. To address this, the focus is on enhancing photoacoustic (PA) signal intensity in a non-complex way, which does not require changing any part of an experimental setup. The PA signal intensity enhancement is mainly achieved by manipulating the sample volume and its surroundings. MoS2, a layered material that belongs to the van der Waals crystals was selected due to ease of exfoliation to the proper thickness. A reduction in MoS2 thickness from 112 to 7 µm, resulted in enhancement of the PA signal by a factor of ∼50. A simple model has been proposed to describe the results based on thermal processes. Additionally, a method to determine the energy gap in transition metal dichalcogenides from PA measurements is presented. |
| format | Article |
| id | doaj-art-0c454fc4184d4bd682edc06ea1503ec2 |
| institution | Kabale University |
| issn | 2213-5979 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Photoacoustics |
| spelling | doaj-art-0c454fc4184d4bd682edc06ea1503ec22025-01-17T04:49:29ZengElsevierPhotoacoustics2213-59792025-02-0141100668Photoacoustic spectroscopy of layered crystals: An enhancement of the photoacoustic signal and its analysis from the perspective of heat generationKamil Misztal0Jan Kopaczek1Robert Kudrawiec2Corresponding author.; Department of Semiconductor Materials Engineering, Wrocław University of Science and Technology, Wybrzeże Stanisława Wyspiańskiego 27, Wrocław 50-370, PolandDepartment of Semiconductor Materials Engineering, Wrocław University of Science and Technology, Wybrzeże Stanisława Wyspiańskiego 27, Wrocław 50-370, PolandDepartment of Semiconductor Materials Engineering, Wrocław University of Science and Technology, Wybrzeże Stanisława Wyspiańskiego 27, Wrocław 50-370, PolandPhotoacoustic spectroscopy is a powerful tool for investigating semiconductors and determining some of their basic properties. However, generating a signal that is large enough for the investigated samples is still challenging. To address this, the focus is on enhancing photoacoustic (PA) signal intensity in a non-complex way, which does not require changing any part of an experimental setup. The PA signal intensity enhancement is mainly achieved by manipulating the sample volume and its surroundings. MoS2, a layered material that belongs to the van der Waals crystals was selected due to ease of exfoliation to the proper thickness. A reduction in MoS2 thickness from 112 to 7 µm, resulted in enhancement of the PA signal by a factor of ∼50. A simple model has been proposed to describe the results based on thermal processes. Additionally, a method to determine the energy gap in transition metal dichalcogenides from PA measurements is presented.http://www.sciencedirect.com/science/article/pii/S2213597924000855Photoacoustic spectroscopyVan der Waals crystalsMoS2 |
| spellingShingle | Kamil Misztal Jan Kopaczek Robert Kudrawiec Photoacoustic spectroscopy of layered crystals: An enhancement of the photoacoustic signal and its analysis from the perspective of heat generation Photoacoustics Photoacoustic spectroscopy Van der Waals crystals MoS2 |
| title | Photoacoustic spectroscopy of layered crystals: An enhancement of the photoacoustic signal and its analysis from the perspective of heat generation |
| title_full | Photoacoustic spectroscopy of layered crystals: An enhancement of the photoacoustic signal and its analysis from the perspective of heat generation |
| title_fullStr | Photoacoustic spectroscopy of layered crystals: An enhancement of the photoacoustic signal and its analysis from the perspective of heat generation |
| title_full_unstemmed | Photoacoustic spectroscopy of layered crystals: An enhancement of the photoacoustic signal and its analysis from the perspective of heat generation |
| title_short | Photoacoustic spectroscopy of layered crystals: An enhancement of the photoacoustic signal and its analysis from the perspective of heat generation |
| title_sort | photoacoustic spectroscopy of layered crystals an enhancement of the photoacoustic signal and its analysis from the perspective of heat generation |
| topic | Photoacoustic spectroscopy Van der Waals crystals MoS2 |
| url | http://www.sciencedirect.com/science/article/pii/S2213597924000855 |
| work_keys_str_mv | AT kamilmisztal photoacousticspectroscopyoflayeredcrystalsanenhancementofthephotoacousticsignalanditsanalysisfromtheperspectiveofheatgeneration AT jankopaczek photoacousticspectroscopyoflayeredcrystalsanenhancementofthephotoacousticsignalanditsanalysisfromtheperspectiveofheatgeneration AT robertkudrawiec photoacousticspectroscopyoflayeredcrystalsanenhancementofthephotoacousticsignalanditsanalysisfromtheperspectiveofheatgeneration |