Stöber silica particles as basis for redox modifications: Particle shape, size, polydispersity, and porosity

Preparation of chitin–silica composites by in vitro silicification of two-dimensional Ianthella basta demosponge chitinous scaffolds under modified Stöber conditions

“…5) of both silicified samples, the chitin bands are suppressed by the strong silica bands at 1104 cm −1 and 474 cm −1 [21,[29][30][31]. The intensive absorption bands at 1104.94 cm −1 Fig.…”

“…At first, appropriate silica dispersions were synthesized independently by a modified Stöber method [20,21]. In general, silica was synthesized by heating of appropriate volume of ethanol solution (anhydrous, 99.8% Sigma-Aldrich, Germany) to a desired temperature.…”

“…To the best of our knowledge, preparation of chitinsilica composites via a base-catalyzed Stöber method has not been reported previously. Thanks to the possibility of easy control of the product properties (porosity, morphology and size), the Stöber method is one of the most popular routes for the synthesis of spherical silica particles [20][21][22].…”

Preparation of monolithic silica–chitin composite under extreme biomimetic conditions

“…6) [33][34][35][36]. The intense, broad band at 1000-1200 cm −1 in the spectra of silicified samples is difficult to interpret, because it is a combination of bands from the siloxane group vibrations [34,36] with C-O and C-O-C (ring) groups of the α-chitin [28,29].…”

Multifunctional silica nanoparticles for optical and magnetic resonance imaging

“…Spherical, nonporous, and monodisperse SiO 2 -NP, with an average diameter of about 100 nm, were synthesized by the St ö ber process (St ö ber et al, 1968 ;Plumere et al , 2012 ), and the exterior surface was further tailored by covalent bonding. In the first step, the surface of the bare SiO 2 -NP was functionalized with Si-H bonds (Plumere et al , 2009 ).…”