Physicochemical and morphological properties of hydrated silicas precipitated following alkoxysilane surface modification

RETRACTED: Surface modification for stability of nano-sized silica colloids

“…However, the complex surface chemistry of silica tends to destabilize suspensions [6], especially for small particles which have a very high specific surface area [7]. While surface modification has been used extensively for improving colloidal stability [8], and various silanes have been used for such a purpose on colloidal silica [2,7,[9][10][11][12][13][14][15], some studies modified the surface of large colloidal particles (>100 nm in diameter) [10,13]. Other work reported strong aggregation especially in small particles [7,11,15], or did not consider dispersion behavior after modification [14].…”

Surface functionalization of silica-coated magnetic nanoparticles for covalent attachment of cholesterol oxidase

“…Amino-silane coupling agent 3-(2-aminoethylamino)-propyldimethoxymethylsilane or commercially recognized as AEAPS belongs to a wide family of silanes and was used for preparation of amino terminated silica-coated maghemite supports for binding different biocatalysts [29]. Derivation of free amino functional groups on the surface of silica-coated maghemite nanoparticles was achieved by silanation reaction.…”

Morphological studies of randomized dispersion magnetite nanoclusters coated with silica

“…Stöber process was first proposed in 1968 by Werner Stöber and co-workers to prepare amorphous silica [25]. Since then frequently studies have been carried out to investigate the preparation of silica microspheres, gelling properties, morphological properties and some other mechanism studies related to the formation of the silica particles [31][32][33][34]. Essentially, this method is based on the use of precursor TEOS which is to be mixed well in the alcohol-water solution under an alkaline condition at room temperature.…”