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Page 4 of 16 Sun et al. Soft Sci. 2025, 5, 35 https://dx.doi.org/10.20517/ss.2025.21

Figure 1. (A) Schematic synthesis of annealed FeCoNi@ZnIn S microspheres with core-shell structure; SEM images of (B) ZnIn S , (C)
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4
2
FeCoNi, (D) FeCoNi@ZnIn S , (E) FCNZ-500, (F) FCNZ-600 and (G) FCNZ-700 microspheres; the particle size distribution of (H)
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FCNZ-500, (I) FCNZ-600 and (J) FCNZ-700 microspheres. SEM: Scanning electron microscope.
3+
2-
In , and S and then heated by an oil bath for 2 h. The ZnIn S nanosheets as a dielectric shell were grown
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on FeCoNi microspheres and subsequently annealed at different temperatures.
The resulting SEM images are displayed in Figure 1B-G. Pure ZnIn S is a flower-like microsphere
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assembled from numerous irregular nanosheets. Different diameters and sizes of flower-like microspheres
can be seen inside the cluster . Subsequently, ZnIn S nanosheets were grown on the rough FeCoNi
[35]
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microspheres, which indicates the core-shell FCNZ structure. At the same time, as the annealing
temperature increased, the microspheres gradually became smoother, and the average particle size gradually
increased [Figure 1H-J].