Epsilon-near-zero and magnetically driven properties for medium-entropy FeCoNi alloy particle-doped CNTs and their derivatives

IF 23.2 2区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES
Xinxue Tang, Yunchen Long, Jing Zhong, Zheng Zhang, Fei Yin, Zhonghai Ni, Ken Cham-Fai Leung, Kai Sun, Runhua Fan, Juan Song
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引用次数: 0

Abstract

Remarkably low permittivity at plasma frequency for epsilon-near-zero (ENZ) materials has garnered significant interest. This study reports a flexible magnetically driven radio frequency ENZ material. Cobalt nanoparticles, cobalt–nickel, and iron-cobalt–nickel alloy nanoparticles were in situ synthesized on the inner walls of carbon nanotubes (denoted as Co@CNTs, CoNi@CNTs, and FeCoNi@CNTs) and subsequently incorporated into thin films with waterborne polyurethane (PU). Notably, in the FeCoNi@CNTs-PU film, the real permittivity transfers from negative to positive, achieving ENZ performance at 45 MHz. Additionally, the findings indicate a gradual decrease in plasma frequency associated with the alloying process. The underlying mechanisms have been investigated through theoretical calculations, which reveal that as metals are synthesized and alloyed on the inner walls of CNTs, the band structure experiences a flattening effect and non-parabolic enhancement, leading to an increase in effective electron mass. Furthermore, the FeCoNi@CNTs-PU film exhibits exceptional magnetic driving capabilities and flexibility. This positions ENZ materials as promising candidates for applications in magnetically driven actuators and implantable electronic devices.

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来源期刊
CiteScore
26.00
自引率
21.40%
发文量
185
期刊介绍: Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field. The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest. Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials. Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.
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