TY  - JOUR
AU  - Chang, Yukai
AU  - Xu, Yihao
AU  - Zhao, Huilan
AU  - Huo, Yingjie
AU  - Yan, Zhikai
AU  - Li, Penghui
AU  - Li, Shangsheng
AU  - Hu, Meihua
AU  - Wang, Libo
AU  - Hu, Qianku
AU  - Zhou, Aiguo
AU  - Che, Renchao
PY  - 2026
TI  - Tunable lateral size and hierarchical structure SiP2@Ni low-dimensional aggregates for enhanced electromagnetic wave absorption
JO  - Journal of Materiomics
SN  - 2352-8478
VL  - 12
IS  - 4
AB  - Simplifying the technology for regulating dielectric properties and enriching electromagnetic loss mechanisms of layered electromagnetic wave (EMW) absorption materials still faces challenges. Herein, we propose a simple and eco-friendly sieving strategy to control the lateral size (3–50 μm) of multilayered SiP2 flakes for regulating dielectric constants. Moreover, hierarchical-structured 2D SiP2@0D Ni nanoparticles/1D Ni chains low-dimensional aggregates are in-situ constructed on SiP2 flakes via a two-step hydrothermal method to enhance interfacial polarization and electromagnetic synergistic effects. When the lateral size was controlled at 11 μm (SiP2-300), the intrinsic SiP2 exhibits strong reflection loss (RL) value of −38.9 dB at 1.7 mm. Notably, the construction of 2D/0D/1D SiP2@Ni not only maintains a strong RL of −40.1 dB, but also shifts the corresponding absorption frequency from original Ku-band (11.8 GHz) to C-band (7.2 GHz). More importantly, the effective absorption bandwidth is broadened from 2.9 GHz to 4.1 GHz benefiting from the construction of electromagnetic synergy networks. Additionally, the radar cross section (RCS) value (29.14 dB⸱m2) evaluated by the computer simulation technology (CST) results for SiP2@Ni–S2 confirm the excellent dissipation ability. This study provides a new strategy for the application of layered absorbers with low-frequency, broadband and adjustable EMW properties.
UR  - https://doi.org/10.1016/j.jmat.2026.101213
DO  - 10.1016/j.jmat.2026.101213