物理化学学报 >> 2026, Vol. 42 >> Issue (6): 100271.doi: 10.1016/j.actphy.2026.100271

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分子偶极工程调控MXene/ZnO异质结构的介电性能

王嘉浩1,2, 蔡博1,2, 孙博文1,*(), 侯志灵3, 杨树豪1,2, 杨青林1, 赵培炎2, 李文萍4,*(), 张宇2,5, 王广胜1,2,*()   

  1. 1 北京航空航天大学国际创新研究院(北京航空航天大学国际创新学院), 浙江 杭州 311115
    2 北京航空航天大学化学学院, 北京 100191
    3 北京工业大学物理与光电工程学院, 北京 100124
    4 北京航空航天大学物理学院, 北京 100191
    5 西北工业大学化学与化工学院, 陕西 西安 710072
  • 收稿日期:2026-01-16 修回日期:2026-02-26 录用日期:2026-02-27 发布日期:2026-04-21
  • 通讯作者: Email: sunbw@buaa.edu.cn (孙博文)liwp@buaa.edu.cn (李文萍)wanggsh@buaa.edu.cn (王广胜)

Molecular dipole engineering for tailored dielectric properties in MXene/ZnO heterostructures

Jia-Hao Wang1,2, Bo Cai1,2, Bowen Sun1,*(), Zhi-Ling Hou3, Shu-Hao Yang1,2, Qinglin Yang1, Pei-Yan Zhao2, Wen-Ping Li4,*(), Yu Zhang2,5, Guang-Sheng Wang1,2,*()   

  1. 1 Hangzhou International Innovation Institute, Beihang University, Hangzhou 311115, Zhejiang Province, China
    2 School of Chemistry, Beihang University, Beijing 100191, China
    3 School of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing 100124, China
    4 School of Physics, Beihang University, Beijing 100191, China
    5 School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, Shaanxi Province, China
  • Received:2026-01-16 Revised:2026-02-26 Accepted:2026-02-27 Published:2026-04-21
  • Contact: Email: sunbw@buaa.edu.cn (Bowen Sun)liwp@buaa.edu.cn (Wen-Ping Li)wanggsh@buaa.edu.cn (Guang-Sheng Wang)

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摘要：

由于异质材料的结构较为复杂，通过调控其极化效应来优化介电性能仍具有挑战性。本研究通过分子接枝诱导偶极子重新取向，实现了对界面极化强度的精准调控。实验证明，这些偶极子的取向可以有效调节界面极化：–CF3基团增强了电荷转移和极化损耗，而–NH2基团则抑制这些效应。经–CF3修饰优化的MXene/ZnO复合材料最小反射损耗达到−66.7 dB，有效吸收带宽为5.05 GHz，表现出了卓越的电磁波吸收性能。该工作通过界面偶极子工程展示了一种精确调控电磁参数的新策略，为先进吸波材料的设计提供了新思路。

关键词: 介电参数, 偶极矩, 界面极化, 硅烷偶联剂, 氧化锌量子点

Abstract:

The optimization of dielectric properties through controlling polarization effects in heterogeneous materials remains challenging due to structural complexity. This work demonstrates the precise regulation of interface polarization strength through molecular grafting-induced dipole reorientation. Experimental analyses confirm that the orientation of these dipoles effectively modulates the interfacial polarization: the –CF3 group enhances, while the –NH2 group suppresses electron transfer and polarization loss effects. The optimized MXene/ZnO modified with –CF3 composite exhibits exceptional electromagnetic wave absorption performance, achieving a minimum reflection loss of −66.7 dB and an effective absorption bandwidth of 5.05 GHz. This work demonstrates a novel strategy for the precise tuning of electromagnetic parameters through interfacial dipole engineering, offering new insights for the design of advanced electromagnetic wave-absorbing materials.

Key words: Dielectric parameters, Dipole moment, Interface polarization, Silane coupling agents, ZnO quantum dots