Abstract
Abstract The cooperative self-organization of surfactant molecules with reactive silicate species is a key factor in the synthesis of mesoporous materials. Mesostructured films can be produced by exploiting similar self-assembly phenomena at the surface of a solid substrate in contact with a liquid solution; however, in this approach, the properties of the resulting film are strongly influenced by chemical and physical properties of the solid. Alternately, films can be synthesized at vapor/liquid or liquid/liquid interfaces and then transferred to solid substrates. Confinement of the reaction environment to a fluid/ fluid interface provides an additional level of control over the structural evolution that occurs during the reaction, while avoiding undesired influences from a solid phase. This paper presents two examples of mesostructured silica films synthesized at fluid/liquid interfaces: 1) ultrathin films, produced at a gas/liquid interface, having highly regular stripes on two discrete length scales; 2) relatively thick mesoporous silica/collagen composite films, synthesized at a liquid/liquid interface, that are partially crystalline.
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