Sol-gel synthesis in selforganized media for silica materials is shown to result in complex silica morphologies. The composition, microstructure, and viscosity of the bicontinuous microemulsion used—the Figure illustrates such a microemulsion (silica and silicic acid are represented in the water phase and TEOS (tetraethoxysilane) in the oil)—are shown to affect profoundly the formation of interconnecting silica frameworks.
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Sims et al. (1998) studied this question.