Maximized internal scattering in heterostack Ti3C2Tx MXene/graphene oxide film for effective electromagnetic interference shielding

Gang San Lee, Yeo Hoon Yoon, Aamir Iqbal, Jisung Kwon, Taeyeong Yun, Suchithra Padmajan Sasikala, Tufail Hassan, Jin Goo Kim, Jun Tae Kim, Chan Woo Lee, Myung Ki Kim, Chong Min Koo, Sang Ouk Kim

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Two-dimensional (2D) MXenes have attracted significant attention in electromagnetic interference (EMI) shielding applications due to their excellent metallic conductivity, high surface area, 2D geometry, tunable surface chemistry, and solution processability. In this study, we present a straightforward way of introducing multiple nanoscale interfaces into Ti3C2T x MXenes using insulating graphene oxide (GO) intercalants to enhance internal scattering, resulting in improved EMI shielding effectiveness (SE). The amine-functionalized MXene with positive surface charge and negatively charged GO flakes are electrostatically self-assembled to form a 2D/2D heterostack of MXene/GO nanosheets. The resultant 2D/2D alternating heterostack of MXene/GO bearing multiple internal interfaces with significant impedance mismatch enhances the internal scattering of incident electromagnetic (EM) waves. Interestingly, despite their inferior electrical conductivity, the MXene/GO heterostack films exhibit higher EMI SE values than the randomly mixed hybrid films, and even outperform pristine MXene films. These MXene/GO heterostack films with enhanced absorption of EM waves via the strong internal scattering effect suggest a valuable pathway toward practical EMI shielding with thin and lightweight features.

Original languageEnglish
Article number035022
Journal2D Materials
Volume10
Issue number3
DOIs
Publication statusPublished - 2023 Jul

Bibliographical note

Publisher Copyright:
© 2023 IOP Publishing Ltd.

Keywords

  • MXene
  • assembly
  • electromagnetic interference shielding
  • graphene oxide
  • heterostack
  • interfaces
  • internal scattering

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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