Multi-magnetic regulation of hollow CoNi microspheres via morphological evolution for ultrahigh electromagnetic wave absorption
- 1Technological Institute of Materials & Energy Science (TIMES) ; Shaanxi Key Laboratory of Liquid Crystal Polymer Intelligent Display ; Key Laboratory of Liquid Crystal Polymers based Flexible Display Technology in National Petroleum and Chemical Industry ; School of Materials and New Energy , Xijing University , Xi'an 710123 , China
- 2School of Chemistry and Chemical Engineering , Northwestern Polytechnical University , Xi'an 710129 , China
Abstract
Hollow cavity and multi-magnetic components are of great significance in adjusting impedance characteristics and realizing ultrahigh electromagnetic wave attenuation. Inspired by this thought, hollow CoNi microspheres are successfully fabricated by a sacrificial template strategy, in which the morphological evolution via the cation exchange reaction plays an indispensable role in regulating the multi-magnetic components. Results reveal that hollow cavity significantly balances the impedance matching and establishes more conductive networks for the enhancement of conduction loss, the cation exchange process promotes the morphological evolution from polyhedral structure to two-dimensional (2D) nanosheets and the compositional regulation from single to multi-magnetic components, and the formation of multiple hetero-interfaces induces strong interfacial polarization. As expected, the as-synthesized hollow CoNi microspheres display ultrahigh electromagnetic wave absorption, the maximum reflection loss is up to −62.9 dB and the absorption bandwidth achieves 7.5 GHz with only 15 wt.% filler loading. Moreover, the specific reflection loss and specific effective absorption bandwidth are higher than the vast majority of counterparts, demonstrating the potential practical applications in the field of electromagnetic stealth and protection.
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BibTeX
@article{song2026multimagnetic,
title = {{Multi-magnetic regulation of hollow CoNi microspheres via morphological evolution for ultrahigh electromagnetic wave absorption}},
author = {Wenqi Song and Chunyang Lan and Zhaona Du and Chenyu Wang and Panbo Liu},
journal = {Nano Research},
year = {2026},
month = jul,
doi = {10.26599/nr.2026.94909011},
url = {https://doi.org/10.26599/nr.2026.94909011},
note = {CC BY},
}
RIS
TY - JOUR
TI - Multi-magnetic regulation of hollow CoNi microspheres via morphological evolution for ultrahigh electromagnetic wave absorption
AU - Wenqi Song
AU - Chunyang Lan
AU - Zhaona Du
AU - Chenyu Wang
AU - Panbo Liu
PY - 2026
DA - 2026/07/14
JO - Nano Research
DO - 10.26599/nr.2026.94909011
UR - https://doi.org/10.26599/nr.2026.94909011
AB - Hollow cavity and multi-magnetic components are of great significance in adjusting impedance characteristics and realizing ultrahigh electromagnetic wave attenuation. Inspired by this thought, hollow CoNi microspheres are successfully fabricated by a sacrificial template strategy, in which the morphological evolution via the cation exchange reaction plays an indispensable role in regulating the multi-magnetic components. Results reveal that hollow cavity significantly balances the impedance matching and establishes more conductive networks for the enhancement of conduction loss, the cation exchange process promotes the morphological evolution from polyhedral structure to two-dimensional (2D) nanosheets and the compositional regulation from single to multi-magnetic components, and the formation of multiple hetero-interfaces induces strong interfacial polarization. As expected, the as-synthesized hollow CoNi microspheres display ultrahigh electromagnetic wave absorption, the maximum reflection loss is up to −62.9 dB and the absorption bandwidth achieves 7.5 GHz with only 15 wt.% filler loading. Moreover, the specific reflection loss and specific effective absorption bandwidth are higher than the vast majority of counterparts, demonstrating the potential practical applications in the field of electromagnetic stealth and protection.
SN - 1998-0000
SN - 1998-0124
ER -