Modulating electromagnetic response through the regulation of built-in electric fields

IF 11.2 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Science & Technology Pub Date : 2025-06-23 DOI:10.1016/j.jmst.2025.03.110

Chenming Liang, Zhiling Hou, Martin C. Koo, Feifei Xu, Shuang Bai, Yunxia Bai, Yu Zhang, Bo Cai, Peiyan Zhao, Guangsheng Wang

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Abstract

The construction of built-in electric fields (BIEF) in heterogeneous structures represents an effective approach for optimizing the electromagnetic (EM) parameters of composite materials. However, effectively regulating the BIEF intensity within the material matrix to better address the issues of dielectric constant frequency dependence and impedance mismatch remains a significant challenge. In this manuscript, a novel material Co@N-TiO2/TiN (Co@NTT), which utilizes doping to regulate the strength of the BIEF is meticulously fabricated. Both experimental and theoretical results confirm the interface charge redistribution induced by the strong BIEF, which not only effectively modulates the EM parameters but also subtly optimizes impedance matching. It exhibits good absorption capability across multiple frequency bands, with a minimum reflection loss of −62.2 dB in the C band and −67.4 dB in the Ku band. This work paves the way for the development of functional materials with tailored EM properties through space charge engineering.

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通过调节内置电场来调制电磁响应

在非均相结构中构建内置电场是优化复合材料电磁参数的有效途径。然而，如何有效地调节材料基体内的BIEF强度以更好地解决介电常数频率依赖和阻抗失配问题仍然是一个重大挑战。本文精心制备了一种利用掺杂调节BIEF强度的新型材料Co@N-TiO2/TiN （Co@NTT）。实验和理论结果都证实了强BIEF引起的界面电荷重分布不仅有效地调节了电磁参数，而且巧妙地优化了阻抗匹配。它具有良好的多频段吸收能力，在C波段和Ku波段的反射损耗分别为- 62.2 dB和- 67.4 dB。这项工作为通过空间电荷工程开发具有定制EM特性的功能材料铺平了道路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Materials Science & Technology 工程技术-材料科学：综合

CiteScore

20.00

自引率

11.00%

发文量

995

审稿时长

13 days

期刊介绍： Journal of Materials Science & Technology strives to promote global collaboration in the field of materials science and technology. It primarily publishes original research papers, invited review articles, letters, research notes, and summaries of scientific achievements. The journal covers a wide range of materials science and technology topics, including metallic materials, inorganic nonmetallic materials, and composite materials.