title: Hybrid silica-silicone nanocapsules obtained in catanionic vesicles. Cryo-TEM studies.
abstract: An effective way to obtain hollow hybrid silica-silicone nanocapsules of controlled diameter is presented. For that purpose a new precursor of silica-silicone material, tetra(triethoxysilylethyl) tetramethylcyclotetrasiloxane, was synthesized by hydrosilylation of vinyltriethoxysilane with tetramethylcyclotetrasiloxane. Mixture of dodecyltrimethylammonium bromide (DTAB) and sodium dodecylbenzenesulfonate (SDBS) in the cationic (the DTAB/SDBS system) rich region of the phase diagram was used to form the vesicular templates. The hybrid silica-silicone nanocapsules was obtained in base-catalyzed polymerization/polycondensation processes of the precursor inside of vesicle membrane. The shape and morphology of the silica-silicone nanocapsules was evaluated using transmission cryo-electron microscopy (cryo-TEM). Cryo-TEM reveals formation of discrete hollow shells of diameter consisted with the sizes of equilibrium vesicles used for templating.
authors.affiliation: Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland.
authors.forename: Mariusz
authors.initials: M
authors.lastname: Kepczyński
authors.forename: Jan
authors.initials: J
authors.lastname: Bednar
authors.forename: Joanna
authors.initials: J
authors.lastname: Lewandowska
authors.forename: Magdalena
authors.initials: M
authors.lastname: Staszewska
authors.forename: Maria
authors.initials: M
authors.lastname: Nowakowska