Confined In-Situ Encapsulation of Co/C Composites with Increased Heterogeneous Interface Polarization for Enhanced Electromagnetic Performance
文献类型：期刊论文
| 作者 | Qiu, Jiahang1,4; Liang, Yan1,4; Xiang, Yao1,4; Zhang, Mu1,4; Zhao, Rongzhi5; Li, Xiaodong4; Ma, Song2; Luo, Zhengtang3; Zhang, Xuefeng5; Sun, Xudong1,4 |
| 刊名 | SMALL
 |
| 出版日期 | 2023-11-10 |
| 页码 | 13 |
| 关键词 | 1D structures dielectric loss microwave absorption yolk-shells |
| ISSN号 | 1613-6810 |
| DOI | 10.1002/smll.202308270 |
| 通讯作者 | Zhang, Mu(zhangm@mail.neu.edu.cn) ; Sun, Xudong(sunxd@mail.neu.edu.cn) |
| 英文摘要 | It is an urgent problem to realize reliable microwave absorption materials (MAMs) with low density. To address this issue, a series of controlled experiments w ere carried out, which indicated that the tubular structure enables excellent microwave absorption properties with a lower powder filling rate. This performance is attributable to the combined dielectric and magnetic loss mechanisms provided by Co/C and the interface polarization facilitated by multiple heterogeneous interfaces. Particularly, Co@C nanotubes, benefiting from the enhanced heterointerface polarization due to their abundant specific surface area and the reduced electron migration barrier induced by their 1D stacked structure, effectively achieved a dual enhancement of dielectric loss and polarization loss at lower powder filling ratios. Furthermore, the magnetic coupling effect of magnetic nanoparticle arrays in tubular structures is demonstrated by micromagnetic simulation, which have been few reported elsewhere. These propertied enable Co@C nanotubes to achieve minimum reflection loss and maximum effective absorption broadband values of 61.0 dB and 5.5 GHz, respectively, with a powder filling ratio of 20 wt% and a thickness of 1.94 mm. This study reveals the significance of designing 1D structures in reducing powder filling ratio and matching thickness, providing valuable insights for developing MAMs with different microstructures. Hollow structured 1D Co@C nanotubes are synthesized by utilizing CTAB micelle as sacrificial templates. These nanotubes possess a locally conductive network formed by their tubular structure, exceptional magnetic properties confirmed through micromagnetic simulation. Experimental outcomes and RCS simulation validate that the synergistic effect of multiple loss mechanisms and optimized impedance matching contributes to the outstanding electromagnetic wave absorption capabilities.image |
| 资助项目 | This work was supported by the National Natural Science Foundation of China (52072063), Research start-up fund of Foshan Graduate School of innovation of Northeastern University and the Scientific Research Project of Foshan Talents (200076622003).[52072063] ; National Natural Science Foundation of China ; Research start-up fund of Foshan Graduate School of innovation of Northeastern University[200076622003] ; Scientific Research Project of Foshan Talents |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001099352400001 |
| 出版者 | WILEY-V C H VERLAG GMBH |
| 资助机构 | This work was supported by the National Natural Science Foundation of China (52072063), Research start-up fund of Foshan Graduate School of innovation of Northeastern University and the Scientific Research Project of Foshan Talents (200076622003). ; National Natural Science Foundation of China ; Research start-up fund of Foshan Graduate School of innovation of Northeastern University ; Scientific Research Project of Foshan Talents |
| 源URL | [http://ir.imr.ac.cn/handle/321006/177435]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Zhang, Mu; Sun, Xudong |
| 作者单位 | 1.Northeastern Univ, Foshan Grad Sch Innovat, Foshan 528311, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China 3.Hong Kong Univ Sci & Technol, Dept Chem & Biol Engn, Kowloon, Clear Water Bay, Hong Kong 999077, Peoples R China 4.Northeastern Univ, Minist Educ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat, Shenyang 110819, Peoples R China 5.Hangzhou Dianzi Univ, Coll Mat & Environm Engn, Inst Adv Magnet Mat, Hangzhou 310012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qiu, Jiahang,Liang, Yan,Xiang, Yao,et al. Confined In-Situ Encapsulation of Co/C Composites with Increased Heterogeneous Interface Polarization for Enhanced Electromagnetic Performance[J]. SMALL,2023:13. |
| APA | Qiu, Jiahang.,Liang, Yan.,Xiang, Yao.,Zhang, Mu.,Zhao, Rongzhi.,...&Sun, Xudong.(2023).Confined In-Situ Encapsulation of Co/C Composites with Increased Heterogeneous Interface Polarization for Enhanced Electromagnetic Performance.SMALL,13. |
| MLA | Qiu, Jiahang,et al."Confined In-Situ Encapsulation of Co/C Composites with Increased Heterogeneous Interface Polarization for Enhanced Electromagnetic Performance".SMALL (2023):13. |
入库方式： OAI收割
来源：金属研究所
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