Confined In-Situ Encapsulation of Co/C Composites with Increased Heterogeneous Interface Polarization for Enhanced Electromagnetic Performance

doi:10.1002/smll.202308270

IMR OpenIR

	Confined In-Situ Encapsulation of Co/C Composites with Increased Heterogeneous Interface Polarization for Enhanced Electromagnetic Performance
	Qiu, Jiahang 1,2; Liang, Yan 1,2; Xiang, Yao 1,2; Zhang, Mu 1,2; Zhao, Rongzhi 3; Li, Xiaodong 1; Ma, Song 4; Luo, Zhengtang 5; Zhang, Xuefeng 3; Sun, Xudong 1,2
通讯作者	Zhang, Mu(zhangm@mail.neu.edu.cn) ; Sun, Xudong(sunxd@mail.neu.edu.cn)
	2023-11-10
发表期刊	SMALL
ISSN	1613-6810
页码	13
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
关键词	1D structures dielectric loss microwave absorption yolk-shells
资助者	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
DOI	10.1002/smll.202308270
收录类别	SCI
语种	英语
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
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:001099352400001
出版者	WILEY-V C H VERLAG GMBH
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/177436
专题	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, Minist Educ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat, Shenyang 110819, Peoples R China 2.Northeastern Univ, Foshan Grad Sch Innovat, Foshan 528311, Peoples R China 3.Hangzhou Dianzi Univ, Coll Mat & Environm Engn, Inst Adv Magnet Mat, Hangzhou 310012, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China 5.Hong Kong Univ Sci & Technol, Dept Chem & Biol Engn, Kowloon, Clear Water Bay, Hong Kong 999077, 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.