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A schematic illustration of the synthesis of MSNs. Initially, surfactant micelles are formed which then self-assemble forming a lyotropic liquid-crystal phase. Condensation of the silica source around the surfactant template and subsequent surfactant template removal produces MCM-41. Here, tetraethyl orthosilicate (TEOS) is used as the silica source and cetyltrimethylammonium bromide (CTAB) as the surfactant template.
