Effective terahertz shielding properties of extreme graphene-silver nanowire surfaces investigated by nanoprobing
Summary: In the terahertz (THz) electromagnetic wave regime, which has recently received great attention in the fields of communication and security, shielding of THz waves is a significant issue. Therefore, carbon-based nanostructures or polymer–carbon nanocomposites have been widely explored. Here...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-04-01
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| Series: | iScience |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2589004222003030 |
| _version_ | 1818321074802130944 |
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| author | Geon Lee Sung Jun Kim Yeeun Roh Sang-Hun Lee Dai-Sik Kim Sang Woo Kim Minah Seo |
| author_facet | Geon Lee Sung Jun Kim Yeeun Roh Sang-Hun Lee Dai-Sik Kim Sang Woo Kim Minah Seo |
| author_sort | Geon Lee |
| collection | DOAJ |
| description | Summary: In the terahertz (THz) electromagnetic wave regime, which has recently received great attention in the fields of communication and security, shielding of THz waves is a significant issue. Therefore, carbon-based nanostructures or polymer–carbon nanocomposites have been widely explored. Herein, significantly enhanced THz shielding efficiency is reported for silver nanowires coated with reduced graphene oxide (rGO) and nanoscale THz metamaterials, as compared to the cases without nanoscale metamaterials. Using a nanoslot-patterned metamaterial with strong resonances at certain frequencies, THz transmission in intensity is enhanced up to three orders of magnitude. Enhanced transmission by nanopatterns substantially increases the shielding performance to the external THz waves, even for ultrathin films (several tens of nanometers) produced by a simple spray of rGO (a few nm of flakes) on a complex random nanowire network. Excellent shielding performance is presented and the shielding mechanism is investigated by the nanoprobing configuration at the same time. |
| first_indexed | 2024-12-13T10:35:08Z |
| format | Article |
| id | doaj.art-aee83849bbe242e39eef063672774322 |
| institution | Directory Open Access Journal |
| issn | 2589-0042 |
| language | English |
| last_indexed | 2024-12-13T10:35:08Z |
| publishDate | 2022-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | iScience |
| spelling | doaj.art-aee83849bbe242e39eef0636727743222022-12-21T23:50:45ZengElsevieriScience2589-00422022-04-01254104033Effective terahertz shielding properties of extreme graphene-silver nanowire surfaces investigated by nanoprobingGeon Lee0Sung Jun Kim1Yeeun Roh2Sang-Hun Lee3Dai-Sik Kim4Sang Woo Kim5Minah Seo6Sensor System Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of KoreaClean Energy Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of KoreaSensor System Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Display and Nano System Laboratory, School of Electrical Engineering, Korea University, Seoul 02841, Republic of KoreaDepartment of Optical Engineering, Kumoh National Institute of Technology, Gumi, Gyeongbuk 39177, Republic of KoreaDepartment of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea; Department of Physics and Quantum Photonics Institute, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of KoreaClean Energy Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Corresponding authorSensor System Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Republic of Korea; Corresponding authorSummary: In the terahertz (THz) electromagnetic wave regime, which has recently received great attention in the fields of communication and security, shielding of THz waves is a significant issue. Therefore, carbon-based nanostructures or polymer–carbon nanocomposites have been widely explored. Herein, significantly enhanced THz shielding efficiency is reported for silver nanowires coated with reduced graphene oxide (rGO) and nanoscale THz metamaterials, as compared to the cases without nanoscale metamaterials. Using a nanoslot-patterned metamaterial with strong resonances at certain frequencies, THz transmission in intensity is enhanced up to three orders of magnitude. Enhanced transmission by nanopatterns substantially increases the shielding performance to the external THz waves, even for ultrathin films (several tens of nanometers) produced by a simple spray of rGO (a few nm of flakes) on a complex random nanowire network. Excellent shielding performance is presented and the shielding mechanism is investigated by the nanoprobing configuration at the same time.http://www.sciencedirect.com/science/article/pii/S2589004222003030PhysicsRadiation physicsNanotechnology |
| spellingShingle | Geon Lee Sung Jun Kim Yeeun Roh Sang-Hun Lee Dai-Sik Kim Sang Woo Kim Minah Seo Effective terahertz shielding properties of extreme graphene-silver nanowire surfaces investigated by nanoprobing iScience Physics Radiation physics Nanotechnology |
| title | Effective terahertz shielding properties of extreme graphene-silver nanowire surfaces investigated by nanoprobing |
| title_full | Effective terahertz shielding properties of extreme graphene-silver nanowire surfaces investigated by nanoprobing |
| title_fullStr | Effective terahertz shielding properties of extreme graphene-silver nanowire surfaces investigated by nanoprobing |
| title_full_unstemmed | Effective terahertz shielding properties of extreme graphene-silver nanowire surfaces investigated by nanoprobing |
| title_short | Effective terahertz shielding properties of extreme graphene-silver nanowire surfaces investigated by nanoprobing |
| title_sort | effective terahertz shielding properties of extreme graphene silver nanowire surfaces investigated by nanoprobing |
| topic | Physics Radiation physics Nanotechnology |
| url | http://www.sciencedirect.com/science/article/pii/S2589004222003030 |
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