Choi, Geunchang Shahzad, Faisal Bahk, Young-Mi Jhon, Young Min Park, Hyunchul Alhabeb, Mohamed Anasori, Babak Kim, Dai-Sik Koo, Chong Min Gogotsi, Yury Seo, Minah 2024-01-19T23:04:23Z 2024-01-19T23:04:23Z 2021-09-03 2018-03-05 2195-1071 https://pubs.kist.re.kr/handle/201004/121619 Terahertz (THz) shielding becomes increasingly important with the growing development of THz electronics and devices. Primarily materials based on carbon nanostructures or polymer-carbon nanocomposites have been explored for this application. Herein, significantly enhanced THz shielding efficiencies for 2D titanium carbide (Ti3C2 MXene) thin films with nanoscale THz metamaterials are presented. Nanoscale slot antenna arrays with strong resonances at certain frequencies enhance THz electromagnetic waves up to three orders of magnitude in transmission, which in turn enormously increases the shielding performance in combination with MXene films. Drop-casting of a colloidal solution of MXene (a few micrograms of dry material) can produce an ultrathin film (several tens of nanometers in thickness) on a slot antenna array. Consequently, THz waves strongly localized in the near-field regime by the slot antenna undergo enhanced absorption through the film with a magnified effective refractive index. Finally, the combination of an ultrathin MXene film and a nano-metamaterial shows excellent shielding performance in the THz range. English WILEY-V C H VERLAG GMBH MICROWAVE ABSORBERS TECHNOLOGY ABSORPTION SURFACE BAND Enhanced Terahertz Shielding of MXenes with Nano-Metamaterials Article 10.1002/adom.201701076 1 ADVANCED OPTICAL MATERIALS, v.6, no.5 ADVANCED OPTICAL MATERIALS 6 5 scie scopus 000426604700006 2-s2.0-85040654227 Materials Science, Multidisciplinary Optics Materials Science Optics Article MICROWAVE ABSORBERS TECHNOLOGY ABSORPTION SURFACE BAND 2D materials metamaterials MXene shielding efficiency terahertz spectroscopy