Figure 2.

Schematic illustration of the relationship between mesoscience and HoMS. The formation of HoMS is a result of the intricate interplay between diffusion and reaction, which has a profound impact on the number of shells, the thickness of shells, and the inter‐shell spacing. The building blocks and shell structures of HoMS create two distinct spatial boundaries. This multiscale variation allows for the system to minimize its energy, thereby significantly affecting the electronic structure, geometry, and physicochemical properties of HoMS. For energy/mass transfer in HoMS, the shells and cavities rule differently in withholding and transporting, respectively, thus creating a meso‐regime. By achieving optimal interaction after the compromise, this meso‐regime enables the achievement of enrichment effects, controlled release, and sequential responses.