Synchrotron Radiation / Aqueous Solutions / Porous Materials / X Rays / Sol Gel Process / Nanostructures / Nanostructure / Structural Change / Structural Properties / Low Temperature / Soft X Ray / Electro-optic modulators / Sol gel / Aqueous Solution / Electrical And Electronic Engineering / Nanostructures / Nanostructure / Structural Change / Structural Properties / Low Temperature / Soft X Ray / Electro-optic modulators / Sol gel / Aqueous Solution / Electrical And Electronic Engineering