Depolarization-field-regulated MXene/MoSe₂ heterostructures via geometry and phase engineering for electromagnetic wave absorption.

Authors

Ge Wang, Yunpeng Shen, Xiong Lv, Faxiang Qin, Changfeng Li

Published in

Materials horizons. Oct 26, 2026. Epub Oct 26, 2026.

Abstract

Interfacial polarization is a key loss mechanism in dielectric electromagnetic wave absorbers, yet most core-shell heterostructures have been optimized mainly through compositional complexity rather than spatial interface design. Here, we report a depolarization-field-guided strategy to regulate interfacial polarization in MXene/MoSe₂ heterostructures by coupling geometry engineering with phase modulation. Three representative architectures-lamellar, hollow spherical, and hollow tubular MXene/MoSe₂-were constructed to clarify the role of interface geometry. Discrete dipole approximation simulations reveal that the hollow tubular configuration substantially lowers the depolarization factor and extends the effective axial interface, leading to intensified local electric fields and enhanced polarized charge accumulation. Further regulation of the 1T/2H MoSe₂ phase ratio generates metal-semiconductor heterointerfaces that promote charge redistribution and polarization relaxation. As a result, the optimized hollow tubular MXT-MoSe₂-2 absorber delivers a minimum reflection loss of -61.40 dB at 2.0 mm and an effective absorption bandwidth of 6.10 GHz. This work establishes geometry/phase co-design as an effective route for manipulating depolarization fields and interfacial charge transport in high-performance electromagnetic wave absorbing materials.

PMID:
42930232
Bibliographic data and abstract were imported from PubMed on 26 Oct 2026.

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