Water-based functionalization of mesoporous siliceous materials, Part 1: Morphology and stability of grafted 3-aminopropyltriethoxysilane

The formation of ladder-like APTES oligomers (characterized by NH2C3H6-SiO(OH) MS pattern of 119 Da) within aqueous and solvent-based grafting solutions results in an inhomogeneous morphology of the functionalized silica surface.143