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. 2022 Apr 6;14:96. doi: 10.1007/s40820-022-00830-8

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© The Author(s) 2022

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — Nanodomain variable capacitors and electromagnetic wave (EW) attenuation performance. a‑b HR-TEM and corresponding hologram images. c Charge density map. d Charge density profile along the white arrow and scheme of nanodomain variable capacitors (insert). e‑g The electromagnetic parameters, 3D RL values of Fe@PCS, Co@PCS, and CoFe@PCS. h 2D RL projection of CoFe@PCS. i-k Effective absorption bandwidth (< –10 dB) of Fe@PCS, Co@PCS, and CoFe@PCS. l EW-absorbing performance comparison of CoFe@PCS with other CoFe-based materials (see Table S2 in supporting information)