Reduction in thermal conductivity of monolayer MoS2 by large mechanical strains for efficient thermal management
Abstract Two-dimensional (2D) materials such as graphene and transition metal dichalcogenides (TMDC) have received extensive research interests and investigations in the past decade. In this research, we report the first experimental measurement of the in-plane thermal conductivity of MoS2 monolayer...
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Nature Portfolio
2025-01-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-024-85060-1 |
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| author | Jun Liu Mengqi Fang Eui-Hyeok Yang Xian Zhang |
| author_facet | Jun Liu Mengqi Fang Eui-Hyeok Yang Xian Zhang |
| author_sort | Jun Liu |
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| description | Abstract Two-dimensional (2D) materials such as graphene and transition metal dichalcogenides (TMDC) have received extensive research interests and investigations in the past decade. In this research, we report the first experimental measurement of the in-plane thermal conductivity of MoS2 monolayer under a large mechanical strain using optothermal Raman technique. This measurement technique is direct without additional processing to the material, and MoS2’s absorption coefficient is discovered during the measurement process to further increase this technique’s precision. Tunable uniaxial tensile strains are applied on the MoS2 monolayer by stretching a flexible substrate it sits on. Experimental results demonstrate that, the thermal conductivity is substantially suppressed by tensile strains: under the tensile strain of 6.3%, the thermal conductivity of the MoS2 monolayer drops approximately by 62%. A serious of thermal transport properties at a group of mechanical strains are also reported, presenting a strain-dependent trend. It is the first and original study of 2D materials’ thermal transport properties under a large mechanical strain (> 1%), and provides important information that the thermal transport of MoS2 will significantly decrease at a large mechanical strain. This finding provides the key information for flexible and wearable electronics thermal management and designs. |
| format | Article |
| id | doaj-art-61ae65647f3f41ad97674c548a3626b0 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
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| series | Scientific Reports |
| spelling | doaj-art-61ae65647f3f41ad97674c548a3626b02025-01-19T12:21:09ZengNature PortfolioScientific Reports2045-23222025-01-011511710.1038/s41598-024-85060-1Reduction in thermal conductivity of monolayer MoS2 by large mechanical strains for efficient thermal managementJun Liu0Mengqi Fang1Eui-Hyeok Yang2Xian Zhang3Department of Mechanical Engineering, Stevens Institute of TechnologyDepartment of Mechanical Engineering, Stevens Institute of TechnologyDepartment of Mechanical Engineering, Stevens Institute of TechnologyDepartment of Mechanical Engineering, Stevens Institute of TechnologyAbstract Two-dimensional (2D) materials such as graphene and transition metal dichalcogenides (TMDC) have received extensive research interests and investigations in the past decade. In this research, we report the first experimental measurement of the in-plane thermal conductivity of MoS2 monolayer under a large mechanical strain using optothermal Raman technique. This measurement technique is direct without additional processing to the material, and MoS2’s absorption coefficient is discovered during the measurement process to further increase this technique’s precision. Tunable uniaxial tensile strains are applied on the MoS2 monolayer by stretching a flexible substrate it sits on. Experimental results demonstrate that, the thermal conductivity is substantially suppressed by tensile strains: under the tensile strain of 6.3%, the thermal conductivity of the MoS2 monolayer drops approximately by 62%. A serious of thermal transport properties at a group of mechanical strains are also reported, presenting a strain-dependent trend. It is the first and original study of 2D materials’ thermal transport properties under a large mechanical strain (> 1%), and provides important information that the thermal transport of MoS2 will significantly decrease at a large mechanical strain. This finding provides the key information for flexible and wearable electronics thermal management and designs.https://doi.org/10.1038/s41598-024-85060-1Molybdenum disulfideThermal conductivityInterfacial thermal conductanceLarge mechanical strainsRaman spectroscopy |
| spellingShingle | Jun Liu Mengqi Fang Eui-Hyeok Yang Xian Zhang Reduction in thermal conductivity of monolayer MoS2 by large mechanical strains for efficient thermal management Scientific Reports Molybdenum disulfide Thermal conductivity Interfacial thermal conductance Large mechanical strains Raman spectroscopy |
| title | Reduction in thermal conductivity of monolayer MoS2 by large mechanical strains for efficient thermal management |
| title_full | Reduction in thermal conductivity of monolayer MoS2 by large mechanical strains for efficient thermal management |
| title_fullStr | Reduction in thermal conductivity of monolayer MoS2 by large mechanical strains for efficient thermal management |
| title_full_unstemmed | Reduction in thermal conductivity of monolayer MoS2 by large mechanical strains for efficient thermal management |
| title_short | Reduction in thermal conductivity of monolayer MoS2 by large mechanical strains for efficient thermal management |
| title_sort | reduction in thermal conductivity of monolayer mos2 by large mechanical strains for efficient thermal management |
| topic | Molybdenum disulfide Thermal conductivity Interfacial thermal conductance Large mechanical strains Raman spectroscopy |
| url | https://doi.org/10.1038/s41598-024-85060-1 |
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