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The Fabrication and Progress of Hollow Structures

The fabrication of hollow particles is one of the fastest-growing fields of materials research, owing to their potential applications in catalysis, chromatography, separation, coatings, protection of bioactive agents, microelectronics and electrooptics. As reported in recent studies, a variety of chemical and physicochemical methods have been employed to prepare hollow spheres with hierarchical and well-defined morphologies. For this, a basic understanding of the mechanism and recent advances in the fabrication of hollow spheres is discussed, along with outstanding challenges, issues, and potentially future opportunities. Evidently, it will enable the development in the fabrication of hollow particles with unique and tailored properties.