Han, Meikang Shuck, Christopher Eugene Rakhmanov, Roman Parchment, David Anasori, Babak Koo, Chong Min Friedman, Gary Gogotsi, Yury 2024-01-19T17:34:06Z 2024-01-19T17:34:06Z 2021-09-05 2020-04-28 1936-0851 https://pubs.kist.re.kr/handle/201004/118709 New ultrathin and multifunctional electromagnetic interference (EMI) shielding materials are required for protecting electronics against electromagnetic pollution in the fifth-generation networks and Internet of Things era. Micrometer-thin Ti3C2Tx MXene films have shown the best EMI shielding performance among synthetic materials so far. Yet, the effects of elemental composition, layer structure, and transition-metal arrangement on EMI shielding properties of MXenes have not been explored, despite the fact that more than 30 different MXenes have been reported, and many more are possible. Here, we report on a systematic study of EMI shielding properties of 16 different MXenes, which cover singlemetal MXenes, ordered double-metal carbide MXenes, and random solid solution MXenes of M and X elements. This is the largest set of MXene compositions ever reported in a comparative study. Films with thicknesses ranging from nanometers to micrometers were produced by spin-casting, spraycoating, and vacuum-assisted filtration. All MXenes achieved effective EMI shielding (>20 dB) in micrometer-thick films The EMI shielding effectiveness of sprayed Ti3C2Tx film with a thickness of only , similar to 40 nm reaches 21 dB. Adjustable EMI shielding properties were achieved in solid solution MXenes with different ratios of elements. A transfer matrix model was shown to fit EMI shielding data for highly conductive MXenes but could not describe the behavior of materials with low conductivity. This work shows that many members of the large MXene family can be used for EMI shielding, contributing to designing ultrathin, flexible, and multifunctional EMI shielding films benefiting from specific characteristics of individual MXenes. English AMER CHEMICAL SOC TRANSPARENT LIGHTWEIGHT ULTRATHIN Beyond Ti3C2Tx: MXenes for Electromagnetic Interference Shielding Article 10.1021/acsnano.0c01312 1 ACS NANO, v.14, no.4, pp.5008 - 5016 ACS NANO 14 4 5008 5016 scie scopus 000529895500116 2-s2.0-85084167356 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article TRANSPARENT LIGHTWEIGHT ULTRATHIN MXene two-dimensional electromagnetic interference shielding conductivity film