Affiliation of Author(s):[1] State Key Laboratory of Electronic Thin Film and Integrated Devices, Department of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China; [2] Department of Materials Science and Engineering, National University of Singapore, Singapore, 117576, Singapore; [3] School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637459, Singapore; [4] Department of Materials Science and Engineering and A. J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, PA, 19104, United States
Journal:Advanced Optical Materials
Key Words:Electromagnetic pulse - Pore size - Stealth technology
Abstract:Terahertz (THz) absorption technology is promising in radar stealth, electromagnetic interference (EMI) shielding, and the upcoming 6G communication. However, the most popular metamaterial-based THz absorbers suffer from complex fabrication process and/or narrowband characteristics. Here, a broadband, lightweight, and hydrophobic THz absorber is realized based on Ti3C2Tx MXene sponge foam (MSF) that is obtained by using a dip-coating method. Due to the macroscopic impedance matching to free space and various microscopic morphologies of metallic Ti3C2Tx flakes inside porous architecture, the obtained MSF, with only 2mm thickness, shows almost no THz reflection (minimum ≈ 0.00003%) and high THz absorption over 99.99% under the 100% qualified frequency bandwidth ranging from 0.3 to 1.65 THz. The new strategy of combining large-pore-size porous architecture with MXene-like 2D metallic flakes paves a way to achieving high performance THz absorber with minimal thickness, which is of significance in electromagnetic stealth, shielding, and beyond. ? 2020 Wiley-VCH GmbH
Document Type:Journal article (JA)
Volume:8
Issue:21
ISSN No.:21951071
Translation or Not:no