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Hierarchically Porous and Interconnected Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> MXene Networks via Interface-Directed Functionalization for Lithium-Sulfur Batteries.

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Fabrication of Ti3C2 MXene Microelectrode Arrays for In Vivo Neural Recording
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Electromagnetic Shielding of Monolayer MXene Assemblies.

Taeyeong Yun1, Hyerim Kim2,3, Aamir Iqbal2,4

  • 1National Creative Research Initiative Centre for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST Institute for Nanocentury, Daejeon, 34141, Korea.

Advanced Materials (Deerfield Beach, Fla.)
|January 24, 2020
PubMed
Summary

Thin films of 2D titanium carbide (Ti3C2Tx) MXene offer exceptional electromagnetic interference (EMI) shielding. Even a thin, 55 nm film achieves 99% shielding, promising advanced protection for compact electronics.

Keywords:
2D materialsMXeneelectromagnetic interference shieldingnanomaterialsself-assembly

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Condensed Matter Physics

Background:

  • Miniaturization of electronic devices necessitates effective nanoscale electromagnetic interference (EMI) shielding.
  • Traditional shielding materials often lack the required thinness or efficiency for next-generation electronics.

Purpose of the Study:

  • To systematically investigate the EMI shielding performance of 2D Ti3C2Tx MXene films.
  • To explore the relationship between film thickness and shielding effectiveness at the nanoscale.

Main Methods:

  • Fabrication of 2D Ti3C2Tx MXene films with controlled, monolayer-by-monolayer thickness.
  • Experimental characterization of EMI shielding over a wide range of frequencies.
  • Application of theoretical models to elucidate shielding mechanisms, including surface reflection and bulk absorption.

Main Results:

  • A single-layer MXene film provided approximately 20% electromagnetic wave shielding.
  • A 24-layer film (approx. 55 nm thickness) achieved 99% shielding (20 dB).
  • An exceptionally high absolute shielding effectiveness of 3.89 × 10^6 dB cm²/g was demonstrated.

Conclusions:

  • Solution-processable MXene films offer a groundbreaking approach for lightweight and compact EMI shielding.
  • These findings pave the way for advanced shielding solutions in portable and miniaturized electronic devices.
  • The study highlights the potential of 2D materials in addressing critical challenges in modern electronics.