Magnetic-Dielectric Synergy in One-Dimensional Metal Heterostructures for Enhanced Low-Frequency Microwave AbsorptionOA
Microwave absorption(MA)materials often face poor synergy between impedance matching and attenuation in the low-frequency range.Balancing permittivity and permeability through magnetic-dielectric synergy is a promising strategy to address this issue.To realize the synergy,herein,Sn whiskers with an in situ oxide layer served as substrates for magnetic-loss-active CoNi nanosheet growth,forming a hierarchical CoNi@SnO_(2)@Sn(CNS)heterostructure.The CNS absorber achieves a minimum reflection loss(RL_(min))value of-62.29 dB with an effective absorption bandwidth(EAB)of 2.2 GHz,covering the entire C-band with 70%absorption at only 2.61 mm thickness.The nanosheet design of CoNi enhances magnetic anisotropy to promote natural resonance,while the conductive Sn core and abundant Sn/SnO_(2) and CoNi/SnO_(2) heterointerfaces facilitate conduction loss and dielectric polarization.When composited into a thermoplastic polyurethane(TPU)matrix,the resulting CNS/TPU-2 film(20 wt%CNS)exhibits an RL_(min) value of-61.04 dB and a 2.5 GHz EAB.Its in-plane and through-plane thermal conductivities reach 2.41 and 0.51 W m^(-1) K^(-1),representing 4.1 and 2.6 times those of pure TPU films,respectively,facilitating heat dissipation from protected devices.This work provides valuable insights into magnetic-dielectric synergy for low-frequency MA of 1D metal-based materials,offering promising potential for 5G communications and flexible electronics.
Feiyue Hu;Peigen Zhang;Pei Ding;Shuo Zhang;Bingbing Fan;Ali Saffar Shamshirgar;Wei Zheng;Wenwen Sun;Longzhu Cai;Haijiao Xie;Qiyue Shao;Johanna Rosen;ZhengMing Sun
State Key Laboratory of Engineering Materials for Major Infrastructure,School of Materials Science and Engineering,Southeast University,Nanjing 211189,People’s Republic of ChinaState Key Laboratory of Engineering Materials for Major Infrastructure,School of Materials Science and Engineering,Southeast University,Nanjing 211189,People’s Republic of ChinaState Key Laboratory of Engineering Materials for Major Infrastructure,School of Materials Science and Engineering,Southeast University,Nanjing 211189,People’s Republic of ChinaState Key Laboratory of Engineering Materials for Major Infrastructure,School of Materials Science and Engineering,Southeast University,Nanjing 211189,People’s Republic of ChinaSchool of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,People’s Republic of China Department of Engineering,Faculty of Environment,Science and Economy,University of Exeter,Exeter EX44QF,UKMaterials Design Division,Department of Physics,Chemistry and Biology(IFM),Linköping University,58183 Linköping,SwedenState Key Laboratory of Engineering Materials for Major Infrastructure,School of Materials Science and Engineering,Southeast University,Nanjing 211189,People’s Republic of ChinaState Key Laboratory of Engineering Materials for Major Infrastructure,School of Materials Science and Engineering,Southeast University,Nanjing 211189,People’s Republic of ChinaState Key Laboratory of Millimeter Waves,School of Information Science and Engineering,Southeast University,Nanjing 210096,People’s Republic of ChinaHangzhou Yanqu Information Technology Co.,Ltd,Hangzhou 310003,People’s Republic of ChinaState Key Laboratory of Engineering Materials for Major Infrastructure,School of Materials Science and Engineering,Southeast University,Nanjing 211189,People’s Republic of ChinaMaterials Design Division,Department of Physics,Chemistry and Biology(IFM),Linköping University,58183 Linköping,SwedenState Key Laboratory of Engineering Materials for Major Infrastructure,School of Materials Science and Engineering,Southeast University,Nanjing 211189,People’s Republic of China
通用工业技术
Low frequency microwave absorptionMagnetic-dielectric synergyMAX phaseCoNi@SnO_(2)@Sn heterostructureThermal conductivity
《Nano-Micro Letters》 2026 (5)
P.371-390,20
supported by the National Natural Science Foundation of China(52171033,52431003,U23A20574)the Fundamental Research Funds for the Central Universities(2242025K20004)the SEU Innovation Capability Enhancement Plan for Doctoral Students(CXJH_SEU 24148,CXJH_SEU 25036).
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