One-dimensional (1D) ZnFe₂O₄@SiO₂ (ZS) nanochains were prepared with Stöber method under external magnetic field. Then, 1D ZS nanochains were covered with a uniform polydopamine (PDA) shell, and the pyrolysis process was completed to obtain 1D ZnFe₂O₄@SiO₂@C (ZSC) nanochains. Finally, 1D flower-like ZnFe₂O₄@SiO₂@C@NiCo₂O₄ (ZSCNC) nanochains were fabricated through a simple hydrothermal method. The carbon layer with strong dielectric loss enabled the 1D ZSC nanochains to achieve an ultra-wide effective absorption bandwidth (EAB) of 6.22 GHz. Compared with the above nanochains, the 1D ZSCNC nanochains showed more excellent microwave absorption (MA) properties because of the unique 1D flower-like architectures having large surfaces and multiple interfaces. The sample loaded with 30 wt% 1D flower-like ZSCNC nanochains showed strong MA performances with a minimum reflection loss (RL) value of −54.29 dB (11.14 GHz) and an EAB of 5.66 GHz (11.94–17.60 GHz) at the thickness of 2.39 mm. The 1D flower-like ZSCNC nanochains with strong absorption, broad absorption bandwidth (almost the entire Ku band) and thin layer has a good application prospect for the absorption of electromagnetic waves in Ku band.

在外部磁场下，采用Stöber方法制备了一维（1D）ZnFe ₂ O ₄ @SiO ₂（ZS）纳米链。然后，用均匀的聚多巴胺（PDA）壳覆盖一维ZS纳米链，完成热解过程，获得一维ZnFe ₂ O ₄ @SiO ₂ @C（ZSC）纳米链。最后，一维花状ZnFe ₂ O ₄ @SiO ₂ @ C @ NiCo ₂ O ₄（ZSCNC）纳米链是通过简单的水热法制备的。具有强介电损耗的碳层使一维ZSC纳米链能够实现6.22 GHz的超宽有效吸收带宽（EAB）。与上述纳米链相比，一维ZSCNC纳米链由于具有大表面和多个界面的独特一维花朵状结构，显示出更优异的微波吸收（MA）性能。负载了30 wt％一维花状ZSCNC纳米链的样品表现出很强的MA性能，其最小厚度为-54.29 dB（11.14 GHz）的最小反射损耗（RL）值和5.66 GHz（11.94-17.60 GHz）的EAB。 2.39毫米 一维花状ZSCNC纳米链，吸收力强，