Fabrication of low-dimensional ternary Co₃ZnC/Co/CNT composites and numerical simulation of metamaterials for electromagnetic wave absorption

The growing complexity of electromagnetic (EM) interference has driven significant demand for next-generation absorbers that combine lightweight, flexibility, and good electromagnetic attenuation capability. The low-dimensional ternary Co₃ZnC/Co/CNT composites with hollow structures have been synthesized through in-situ polymerization and high-temperature carbonization. The unique integration of low-dimensional nanostructures and multicomponent heterointerfaces confers exceptional EM absorption properties, achieving a reflection loss of −70.0 dB and significantly reducing radar cross section (RCS) scattering signals. It is particularly meaningful that the numerical simulation of Co₃ZnC/Co/CNT metamaterial reveals ultrawideband absorption performance, achieving 10.7 GHz (7.3–18.0 GHz) at a thickness of 4.5 mm and extending to 15 GHz (3.0–18.0 GHz) with a 10.5 mm. Moreover, the Co₃ZnC/Co/CNT composites retain meritorious EM absorption properties after flexible film formation, broadening their usability and application scope. These investigations will provide seminal insights encompassing theoretical validation, experimental synthesis, and practical application for the next generation of absorbers.