Mesostructured films

Grosso, D., Babonneau, F., Sanchez, C., Soler-Ulia, G., Crepaldi, E. L., Albouy, P. A., Amenitsch, H., Balkenende, A. R. and Brunet-Bruneau, A. (2003). A first insight in the mechanisms involved in the self-assembly of 2D-hexagonal templated Si02 and TiOj mesostructured films during dip-coating. J. Sol-Gel Sci. Technol. 26(1-3), 561-565. 

Coating Process and Self-Assembly of Mesostructured Films... 

Once the film is stable, the surfactant template must be removed to create the mesoporous film from the nonporous mesostructured film. However, upon removal of the template, films may contract and crack, and therefore care must be taken during removal to yield continuous and well-ordered films. 

The mesostructured films were produced by supramolecular templating a silica precursor (TEOS, 98% Merck) with Pluronic F127 (EOxPOyEOx, EO = ethylene oxide, PO = propylene oxide, x = 106, y = 70, BASF) pj. TEOS was prehydrolized in ethanol at 70 °C below the isoelectric point of silica (pH = 2). The pH was adjusted by drop-wise addition of 1 M HCl. In parallel, Pluronic... 

Electrodeposition or pulsed-laser deposition techniques are additional possibilities for forming thin mesostructured films. These techniques have mainly been applied to non-silica mesostructured films such as niobia or platinum, but also hexagonally oriented mesoporous silica films were prepared by pulsed-laser deposition. ... 

Figure 2.2 Schematic of a cross-section along the pore of a mesostructured film showing the functionalisation of surfactant templated silica in different locations using functional alkoxysdanes. White boxes show pairs of molecules incorporated simultaneously into silica films by Minoofar et al. Reprinted with permission from Minoofar, P.N. Hernandez, R. Chia, S. Dunn, B. Zink, J.I. Franville, A.-C., Placement and Characterization of Pairs of Luminescent Molecules in Spatially Separated Regions of Nanostructured Thin Films, J. Am. Chem. Soc., 124, 14388-14396. Copyright 2002 American Chemical Society...

Film deposition via EISA allows straightforward patterning methods to be used to determine the distribution of the mesostructured film on a... 

Mizoshita, N., Goto, Y., Tani, T., and Inagaki, S. 2008. Highly fluorescent mesostructured films that consist of oligo(phenylenevinylene)-silica hybrid frameworks. Adv. Funct. Mater. 18 3699-3705. 

Innocenzi P, Martucd A, GugUelmi M, Bearzotti A, Traversa E (2001) Electrical and structural characterisation of mesoporous sUica thin films as humidity sensors. Sens Actuators B Chem 76 299-303 Innocenzi P, Falcaro P, Bertolo JM, Bearzotti A, Amenitsch H (2005) Electrical responses of silica mesostructured films to changes in environmental humidity and processing conditions. J Non-Cryst Solids 351 1980-1986 Jacobs PA (1977) Carboniogenic activity of zeolites. Elsevier Scientific, New York... 

A series of in situ studies on the growth of mesostructured silicate-surfactant films at the air/water interface was done by the group of Brown (1997, 1998), Holt (1999) and Ruggles (1999, 2000). Initial X-ray reflectivity (XRR) studies indicated formation of the mesostructured film occurred after a lengthy induction period (10-24 hours) at... 

Edler K.J., Goldar A., Brennan T., Roser S.J. Spontaneous mesostructured film growth in polyelectrolyte-surfactant solutions. Chem. Comm. 2003b 1724-1725 Edler K.J., Goldar A., Hughes A.V., Roser S.J., Mann S. Structural studies on surfactant-templated silica films grown at the air/water interface. Microporous Mesoporous Mata-. 2001 44/45 661-670... 

Innocenzi, P., Kidchob, T., Falcaro, P., and Takahashi, M. (2008) Patterning techniques for mesostructured films. Chem. Mater, 20, 607—614. 

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