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Schematic illustration of the pore structures of (A) 2D mesoporous silica, (B) 3DOM silica, and (C) molecular structure of indomethacin.
Notes: 2D mesoporous silica contains cylindrical mesopores arranged parallel to each other, while 3DOM silica contains spherical macropores connected by windows.
Abbreviation: 3DOM, three dimensional ordered macroporous.
