Journal article
Anomalous absorption of electromagnetic waves by 2D transition metal carbonitride Ti3CNTx (MXene)
Science (American Association for the Advancement of Science), Vol.369(6502), pp.446-450
24 Jul 2020
PMID: 32703878
Abstract
Shields up! Specialized conductive materials are used to shield or block electromagnetic radiation such as microwaves or radio waves to either prevent the escape of stray radiation or prevent interference from unwanted sources. Ideal materials should show high effective shielding while requiring a small volume or mass of material. Materials from the MXene family of two-dimensional ceramics, where M is a transition metal and X is either carbon or nitrogen, have shown excellent shielding properties. Iqbal et al. now show even better and somewhat unexpected performance from a metal carbon nitride. Science, this issue p. 446 Lightweight, ultrathin, and flexible electromagnetic interference (EMI) shielding materials are needed to protect electronic circuits and portable telecommunication devices and to eliminate cross-talk between devices and device components. Here, we show that a two-dimensional (2D) transition metal carbonitride, Ti3CNTx MXene, with a moderate electrical conductivity, provides a higher shielding effectiveness compared with more conductive Ti3C2Tx or metal foils of the same thickness. This exceptional shielding performance of Ti3CNTx was achieved by thermal annealing and is attributed to an anomalously high absorption of electromagnetic waves in its layered, metamaterial-like structure. These results provide guidance for designing advanced EMI shielding materials but also highlight the need for exploring fundamental mechanisms behind interaction of electromagnetic waves with 2D materials.
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Details
- Title
- Anomalous absorption of electromagnetic waves by 2D transition metal carbonitride Ti3CNTx (MXene)
- Creators
- Aamir Iqbal - Korea Inst Sci & Technol KIST, Mat Architecturing Res Ctr, Seoul 02792, South KoreaFaisal Shahzad - Korea Inst Sci & Technol KIST, Mat Architecturing Res Ctr, Seoul 02792, South KoreaKanit Hantanasirisakul - Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USAMyung-Ki Kim - Korea Univ, KU KIST Grad Sch Converging Sci & Technol, Seoul 02841, South KoreaJisung Kwon - Korea Univ, KU KIST Grad Sch Converging Sci & Technol, Seoul 02841, South KoreaJunpyo Hong - Korea Inst Sci & Technol KIST, Mat Architecturing Res Ctr, Seoul 02792, South KoreaHyerim Kim - Korea Inst Sci & Technol KIST, Mat Architecturing Res Ctr, Seoul 02792, South KoreaDaesin Kim - Korea Inst Sci & Technol KIST, Mat Architecturing Res Ctr, Seoul 02792, South KoreaYury Gogotsi - Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USAChong Min Koo - Korea Inst Sci & Technol KIST, Mat Architecturing Res Ctr, Seoul 02792, South Korea
- Publication Details
- Science (American Association for the Advancement of Science), Vol.369(6502), pp.446-450
- Publisher
- The American Association for the Advancement of Science; Washington
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Identifiers
- 991014970036204721
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- Web of Science research areas
- Materials Science, Multidisciplinary