Tunable Infrared Emissivity in Multilayer Graphene by Ionic Liquid Intercalation
Controllably tuned infrared emissivity has attracted great interest for potential application in adaptive thermal camouflage. In this work, we report a flexible multilayer graphene based infrared device on a porous polyethylene membrane, where the infrared emissivity could be tuned by ionic liquid i...
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| Format: | Article |
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MDPI AG
2019-07-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/9/8/1096 |
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| author | Liyuan Zhao Renyan Zhang Chuyun Deng Yuanxi Peng Tian Jiang |
| author_facet | Liyuan Zhao Renyan Zhang Chuyun Deng Yuanxi Peng Tian Jiang |
| author_sort | Liyuan Zhao |
| collection | DOAJ |
| description | Controllably tuned infrared emissivity has attracted great interest for potential application in adaptive thermal camouflage. In this work, we report a flexible multilayer graphene based infrared device on a porous polyethylene membrane, where the infrared emissivity could be tuned by ionic liquid intercalation. The Fermi level of surface multilayer graphene shifts to a high energy level through ionic liquid intercalation, which blocks electronic transition below the Fermi level. Thus, the optical absorptivity/emissivity of graphene could be controlled by intercalation. Experimentally, the infrared emissivity of surface graphene was found to be tuned from 0.57 to 0.41 after ionic liquid intercalation. Meanwhile, the relative reflectivity R<sub>v</sub>/R<sub>0</sub> of surface graphene increased from 1.0 to 1.15. The strong fluorescence background of Raman spectra, the upshift of the G peak (~23 cm<sup>−1</sup>), and the decrease of sheet resistance confirmed the successful intercalation of ionic liquid into the graphene layers. This intercalation control of the infrared emissivity of graphene in this work displays a new way of building an effective thermal camouflage system. |
| first_indexed | 2024-04-12T08:18:31Z |
| format | Article |
| id | doaj.art-235c062aad8440a2ab8e50dc00eb2dd1 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-04-12T08:18:31Z |
| publishDate | 2019-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-235c062aad8440a2ab8e50dc00eb2dd12022-12-22T03:40:42ZengMDPI AGNanomaterials2079-49912019-07-0198109610.3390/nano9081096nano9081096Tunable Infrared Emissivity in Multilayer Graphene by Ionic Liquid IntercalationLiyuan Zhao0Renyan Zhang1Chuyun Deng2Yuanxi Peng3Tian Jiang4State Key Laboratory of High Performance Computing, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Arts and Science, National University of Defense Technology, Changsha 410073, ChinaState Key Laboratory of High Performance Computing, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaControllably tuned infrared emissivity has attracted great interest for potential application in adaptive thermal camouflage. In this work, we report a flexible multilayer graphene based infrared device on a porous polyethylene membrane, where the infrared emissivity could be tuned by ionic liquid intercalation. The Fermi level of surface multilayer graphene shifts to a high energy level through ionic liquid intercalation, which blocks electronic transition below the Fermi level. Thus, the optical absorptivity/emissivity of graphene could be controlled by intercalation. Experimentally, the infrared emissivity of surface graphene was found to be tuned from 0.57 to 0.41 after ionic liquid intercalation. Meanwhile, the relative reflectivity R<sub>v</sub>/R<sub>0</sub> of surface graphene increased from 1.0 to 1.15. The strong fluorescence background of Raman spectra, the upshift of the G peak (~23 cm<sup>−1</sup>), and the decrease of sheet resistance confirmed the successful intercalation of ionic liquid into the graphene layers. This intercalation control of the infrared emissivity of graphene in this work displays a new way of building an effective thermal camouflage system.https://www.mdpi.com/2079-4991/9/8/1096grapheneionic liquidintercalationflexibleinfrared emissivity |
| spellingShingle | Liyuan Zhao Renyan Zhang Chuyun Deng Yuanxi Peng Tian Jiang Tunable Infrared Emissivity in Multilayer Graphene by Ionic Liquid Intercalation Nanomaterials graphene ionic liquid intercalation flexible infrared emissivity |
| title | Tunable Infrared Emissivity in Multilayer Graphene by Ionic Liquid Intercalation |
| title_full | Tunable Infrared Emissivity in Multilayer Graphene by Ionic Liquid Intercalation |
| title_fullStr | Tunable Infrared Emissivity in Multilayer Graphene by Ionic Liquid Intercalation |
| title_full_unstemmed | Tunable Infrared Emissivity in Multilayer Graphene by Ionic Liquid Intercalation |
| title_short | Tunable Infrared Emissivity in Multilayer Graphene by Ionic Liquid Intercalation |
| title_sort | tunable infrared emissivity in multilayer graphene by ionic liquid intercalation |
| topic | graphene ionic liquid intercalation flexible infrared emissivity |
| url | https://www.mdpi.com/2079-4991/9/8/1096 |
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