Iqbal, Aamir Kwon, Jisung Hassan, Tufail Park, Sang Woon Lee, Won-Hee Oh, Jung-Min Hong, Junpyo Lee, Juyun Naqvi, Shabbir Madad Zafar, Ujala Kim, Seon Joon Park, Jong Hyuk Kim, Myung-Ki Koo, Chong Min 2024-07-26T05:30:33Z 2024-07-26T05:30:33Z 2024-07-25 2025-05 1616-301X https://pubs.kist.re.kr/handle/201004/150303 Advanced electronics and telecommunication devices rely on electromagnetic (EM) waves of a wide frequency range during their operation, thereby necessitating the development of efficient and ultrathin materials for electromagnetic interference (EMI) shielding across multispectral EM waves, particularly those exceeding 100 GHz, equivalent to millimeter wavelengths. Here, this study reveals that highly crystalline Ti3C2Tx MXene exhibits excellent EMI shielding performance across a multispectral frequency range from 100 kHz to 110 GHz, along with outstanding environmental stability and processability for solution coating and film fabrication. Notably, the highly crystalline Ti3C2Tx MXene films exhibit the highest electrical conductivity (18,000 S cm(-1)) and remarkable environmental stability (maintaining >95% electrical conductivity over one year), coupled with effective EMI shielding (up to 106 dB at 110 GHz with an ultrathin thickness of 10 mu m), surpassing five other MXenes, including Nb2CTx, V2CTx, conv.-Ti3C2Tx, Ti3CNTx, and Mo2Ti2C3Tx, and different synthetic materials. Furthermore, increasing the thickness, electrical conductivity, and frequency enhances the shielding performance. These results demonstrate the potential of applying MXenes to next-generation portable electronics, radar systems, and autonomous vehicles. This study also provides insight into the fundamental shielding mechanisms related to material thickness, electrical conductivity, and frequency of EM waves. English John Wiley & Sons Ltd. Environmentally Stable and Highly Crystalline MXenes for Multispectral Electromagnetic Shielding up to Millimeter Waves Article 10.1002/adfm.202409346 1 Advanced Functional Materials, v.35, no.18 Advanced Functional Materials 35 18 Y scie scopus 001269915200001 2-s2.0-85198114855 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article MXenes skin depth electromagnetic interference electronic devices millimeter wave multispectral shielding