Anomalous absorption of electromagnetic waves by 2D transition metal carbonitride Ti3CNT x (MXene)

Aamir Iqbal; Faisal Shahzad; Kanit Hantanasirisakul; Myung-Ki Kim; Jisung Kwon; Junpyo Hong; Hyerim Kim; Daesin Kim; Yury Gogotsi; Chong Min Koo

doi:10.1126/science.aba7977

Anomalous absorption of electromagnetic waves by 2D transition metal carbonitride Ti₃CNT _x (MXene)

Science. 2020 Jul 24;369(6502):446-450. doi: 10.1126/science.aba7977.

Authors

Aamir Iqbal^{1

2

3}, Faisal Shahzad¹, Kanit Hantanasirisakul³, Myung-Ki Kim⁴, Jisung Kwon⁴, Junpyo Hong¹, Hyerim Kim^{1

4}, Daesin Kim^{1

4}, Yury Gogotsi⁵, Chong Min Koo^{6

2

4}

Affiliations

¹ Materials Architecturing Research Centre, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea.
² Division of Nano & Information Technology, KIST School, University of Science and Technology, Seoul 02792, Republic of Korea.
³ Department of Materials Science and Engineering and A. J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, PA 19104, USA.
⁴ KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea.
⁵ Department of Materials Science and Engineering and A. J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, PA 19104, USA. [email protected] [email protected].
⁶ Materials Architecturing Research Centre, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea. [email protected] [email protected].

PMID: 32703878
DOI: 10.1126/science.aba7977

Abstract

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, Ti₃CNT _x MXene, with a moderate electrical conductivity, provides a higher shielding effectiveness compared with more conductive Ti₃C₂T _x or metal foils of the same thickness. This exceptional shielding performance of Ti₃CNT _x 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.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.
Research Support, Non-U.S. Gov't