Lightweight epsilon-near-zero aerogel at radio frequency with water evaporation performance

IF 23.2 2区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES
Haikun Wu, Jing Zhong, Yunchen Long, Minhui Zhao, Zheng Zhang, Rui Yin, Juan Song, Peng Xie, Qing Hou, Ken Cham-Fai Leung, Runhua Fan, Kai Sun
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Abstract

Epsilon-near-zero (ENZ) materials, due to their unique physical properties, exhibit significant applications in the fields of perfect absorption, high-order harmonics, etc., and have achieved breakthroughs in performance when combined with a variety of electronic devices. Here, lightweight radio frequency ENZ aerogel is designed for the first time, via fabricating polyurethane/high-entropy alloy@carbon (PU/HEA@C) aerogel through entropy engineering strategy, which is an important step in the integration with radio frequency electronic devices. In addition, PU/Cu@C and PU/CoNiCu@C aerogels are also prepared, and their dielectric properties are investigated. With the increase of entropy, the plasma frequency of the aerogel gradually decreases, and the ENZ performance at 24 MHz is achieved in PU/HEA@C aerogel. It is proved by theoretical calculation that with the increase of entropy, the band structure of the alloy becomes flatter, so the non-parabolicity is enhanced, indicating that the effective electron mass is increased, thereby resulting in the reduced plasma frequency of PU/HEA@C aerogel to radio frequency. Moreover, PU/HEA@C aerogel shows excellent water evaporation performance of 3.21 kg·m−2·h−1 under 1 sun irradiation, due to enhanced d-d interband transitions in HEA. This work provides new theoretical guidance for the realization of lightweight and multi-functional aerogels with ENZ performance.

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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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