In-Situ X-ray Scattering Study of Continuous Silica-Surfactant Self-Assembly during Steady-State Dip Coating
نویسندگان
چکیده
Department of Chemical and Nuclear Engineering and Center for Micro-Engineered Materials, UniVersity of New Mexico, Albuquerque, New Mexico, Sandia National Laboratories, Albuquerque, New Mexico, UniVersité du Maine, Faculté des Sciences, UMR 6087, CNRS 72085, Le Mans, Cedex 09, France, Institute of Materials Chemistry, Vienna UniVersity of Technology, Vienna, Austria, and AdVanced Photon Source, Argonne National Laboratory, Argonne, Ilinois
منابع مشابه
In situ fluorescence probing of the chemical and structural changes during formation of hexagonal phase cetyltrimethylammonium bromide and lamellar phase CTAB/ Poly(dodecylmethacrylate) sol–gel silica thin films
Surfactant-templated mesostructured sol–gel films formed by evaporation induced self assembly (EISA) exhibit highly-ordered hexagonal, lamellar, and cubic structures. The steady-state dip-coating configuration allows both the chemistry and the dynamics of the EISA process to be traced in real time because the steps involved in the formation of the mesostructured material are separated both spat...
متن کاملWall thickness and core radius determination in surfactant templated silica thin films using GISAXS and X-ray reflectivity
– X-ray reflectometry and GISAXS (grazing angle small angle scattering) are combined to investigate the morphology and structural parameters of a surfactant templated 2D hexagonal thin-film silica mesophase. It is shown that X-ray reflectivity measurements contain invaluable information about the radius of the cylindrical rods and the distance between their cores. The reflectivity data are anal...
متن کاملPeering into the self-assembly of surfactant templated thin-film silica mesophases.
It is now recognized that self-assembly is a powerful synthetic approach to the fabrication of nanostructures with feature sizes smaller than achievable with state of the art lithography and with a complexity approaching that of biological systems. For example, recent research has shown that silica/surfactant self-assembly combined with evaporation (so-called evaporation induced self-assembly E...
متن کاملSilica nanoparticle crystals and ordered coatings using lys-sil and a novel coating device.
Silica nanoparticles with a narrow particle size distribution and controlled diameters of 10-20 nm are synthesized via hydrolysis and hydrothermal aging of tetraethylorthosilicate in an aqueous L-lysine solution. Cryo-transmission electron microscopy (cryo-TEM) reveals that the silica nanoparticles assemble to form close-packed nanoparticle crystals over short length scales on carbon-coated gri...
متن کاملOptical Patterning of Photosensitive Thin Film Silica Mesophases
Photosensitive films incorporating molecular photoacid generators compartmentalized within a silica-surfactant mesophase were prepared by an evaporationinduced self-assembly process. UV-exposure promoted localized acid-catalyzed siloxane condensation, enabling selective etching of unexposed regions, thereby serving as a cresistIess’ technique to prepare patterned mesoporous silica. We also demo...
متن کامل