【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。更多还原

【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.更多还原