Electromagnetic Shielding of Monolayer MXene Assemblies

Miniaturization of electronics demands electromagnetic interference (EMI) shielding of nanoscale dimension. The authors report a systematic exploration of EMI shielding behavior of 2D Ti3C2Tx MXene assembled films over a broad range of film thicknesses, monolayer by monolayer. Theoretical models are...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2020-03, Vol.32 (9), p.e1906769-n/a
Main Authors: Yun, Taeyeong, Kim, Hyerim, Iqbal, Aamir, Cho, Yong Soo, Lee, Gang San, Kim, Myung‐Ki, Kim, Seon Joon, Kim, Daesin, Gogotsi, Yury, Kim, Sang Ouk, Koo, Chong Min
Format: Article
Language:English
Subjects:
2D materials
electromagnetic interference shielding
Electromagnetic radiation
Electromagnetic shielding
Electronic devices
Materials science
Miniaturization
Monolayers
MXene
MXenes
nanomaterials
Portable equipment
Reflection
self‐assembly
Thickness
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Summary:Miniaturization of electronics demands electromagnetic interference (EMI) shielding of nanoscale dimension. The authors report a systematic exploration of EMI shielding behavior of 2D Ti3C2Tx MXene assembled films over a broad range of film thicknesses, monolayer by monolayer. Theoretical models are used to explain the shielding mechanism below skin depth, where multiple reflection becomes significant, along with the surface reflection and bulk absorption of electromagnetic radiation. While a monolayer assembled film offers ≈20% shielding of electromagnetic waves, a 24‐layer film of ≈55 nm thickness demonstrates 99% shielding (20 dB), revealing an extraordinarily large absolute shielding effectiveness (3.89 × 106 dB cm2 g−1). This remarkable performance of nanometer‐thin solution processable MXene proposes a paradigm shift in shielding of lightweight, portable, and compact next‐generation electronic devices. Self‐assembly of monolayer MXene and systematic exploration of the electromagnetic interference shielding behavior of 2D Ti3C2Tx MXene are presented. Theoretical models explain the shielding mechanism below skin depth. A monolayer assembled MXene film (2.3 nm) and 24‐layer film (≈55 nm) offer ≈20% and 99% shielding, respectively. The extraordinarily large absolute shielding effectiveness reaches 3.89 × 106 dB cm2 g−1.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201906769