Issue 13, 2025

Ultrathin and high-performance electromagnetic wave absorbers enabled by phase-engineered FeSiAl@1T/2H MoS2 interfaces

Abstract

With society progressing toward intelligent systems and the escalating challenges of electromagnetic radiation, the demand for advanced electromagnetic wave (EMW)-absorbing materials has intensified. The prevalent methodology combines magnetic components with dielectric matrices to harness interfacial synergy, enabling concurrent optimization of impedance matching and enhancement in functionality. With better understanding of absorption mechanisms, there has been an increase in microscopic studies. Herein, we demonstrate a hydrothermal route for synthesizing mixed-phase molybdenum disulfide (MoS2-1T/2H) composites with magnetic FeSiAl particles, forming a core–shell FeSiAl@1T/2H MoS2 architecture containing 61% metastable 1T phase. This design leverages the phase-dependent electronic contrast between metallic 1T and semiconducting 2H phases of MoS2. Phase-engineering strategies enable the adjustment of conductive loss and the creation of heterogeneous interfaces, broadening the loss mechanisms and enhancing impedance matching (Z). Achieving an optimal balance between dielectric loss and Z is crucial for improving EMW absorption (EMWA) performance. The material exhibited a minimum reflection loss (RLmin) of −65.6 dB at 1.77 mm and a maximum effective absorption bandwidth (EABmax) of 5.57 GHz at 1.91 mm, offering significant insights into the development of ultra-thin, high-efficiency EMW absorbers. Radar cross-section (RCS) simulations with CST Studio Suite confirmed a 34.0 dB m2 reduction for flat model at 15.81 GHz, providing foundational guidelines for multifrequency adaptive EMWA material engineering.

Graphical abstract: Ultrathin and high-performance electromagnetic wave absorbers enabled by phase-engineered FeSiAl@1T/2H MoS2 interfaces

Supplementary files

Transparent peer review

To support increased transparency, we offer authors the option to publish the peer review history alongside their article.

View this article’s peer review history

Article information

Article type
Paper
Submitted
14 Jan 2025
Accepted
25 Feb 2025
First published
28 Feb 2025

Nanoscale, 2025,17, 8161-8169

Ultrathin and high-performance electromagnetic wave absorbers enabled by phase-engineered FeSiAl@1T/2H MoS2 interfaces

K. Xie, Y. Han, Q. Zhang, F. Chen and Q. Fu, Nanoscale, 2025, 17, 8161 DOI: 10.1039/D5NR00175G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements