J. Mater. Sci. Technol. ›› 2024, Vol. 186: 28-36.DOI: 10.1016/j.jmst.2023.10.046

Special Issue: Electronic materials 2024 Films and coatings 2024 Graphene 2024 Electromagnetic interference shielding materials

• Research Article • Previous Articles     Next Articles

PEDOT:PSS-patched magnetic graphene films with tunable dielectric genes for electromagnetic interference shielding and infrared stealth

Jin-Cheng Shu1, Yu-Ze Wang1, Mao-Sheng Cao*   

  1. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
  • Received:2023-08-31 Revised:2023-10-18 Accepted:2023-10-18 Published:2024-07-01 Online:2023-12-19
  • Contact: *E-mail address: caomaosheng@bit.edu.cn (M.-S. Cao).
  • About author:1These authors contributed equally to this work.

Abstract: The intelligent era brings electronics closer to humans, but also produces a large scale of electromagnetic (EM) radiation simultaneously, which causes serious harm to health and high sophisticated equipment. Exploring the underlying response logic of EM materials is urgently needed to face the challenge of EM interference (EMI) and secondary EM pollution better. Herein, PEDOT:PSS-patched magnetic graphene films are fabricated by vacuum-assisted molecular patching engineering, with tunable EM wave response. Based on the observation of micro-nano structure, the dielectric genes are visually revealed, which offers a bran-new horizon for the optimization of EM properties. Impressively, the constructed films achieve double band shielding toward gigahertz wave and infrared radiation. The optimal EMI shielding efficiency exceeds 99 %, and covers the entire X-band. Meanwhile, the green shielding index rises from 0.3 to 0.6, indicating that it is a potential green EMI shielding materials. Furthermore, the periodic macroscopic interfaces and the inherent thermal anisotropy endow the films with thermal insulation and flexible infrared stealth functions in simulated thermal environments. This work refreshes the insight into multi-band shielding, providing a new idea to EM energy governance.

Key words: PEDOT:PSS-patched magnetic graphene films, Vacuum-assisted molecular patching engineering, Dielectric genes, Electromagnetic interference shielding, Thermal stealth