Mesoporous thin film

Solid-State NMR investigation of formation of mesoporous thin films and powders... 

The fraction of octahedrally coordinated aluminium species is much larger in thermally treated aluminophosphate mesoporous thin films than in thermally treated powders. The difference between thin films and powders might be due to a substrate effect that could retard the formation of a well-defined aluminophosphate framework. Indeed, it has been... 

Although the idea of applying mesoporous thin films of Ti02 (or other suitable oxides) prepared by self-assembly strategies in combination... 

Boissiere, C. Grosso, D. Lepoutre, S. Nicole, L. Bruneau, A. B. Sanchez, C. 2005. Porosity and mechanical properties of mesoporous thin films assessed by environmental ellipsometric porosimetry. Langmuir 21 12362-12371. 

Fuertes, M. C. Lopez-Alcaraz, F. J. Marchi, M. C. Troiani, H. E. Luca, V. Miguez, H. Soler-Illia, G. 2007. Photonic crystals from ordered mesoporous thin-film functional building blocks. Adv. Fund. Mater. 17 1247-1254. 

Crepaldi, E. L. Soler-Illia, G. Grosso, D. Sanchez, M. 2003. Nanocrystallised titania and zirconia mesoporous thin films exhibiting enhanced thermal stability. New J. Chem. 27 9-13. 

Tang J, Wu Y, McFarland EW, Stucky GD (2004) Synthesis and photocatalytic properties of highly crystalline and ordered mesoporous thin film. Chem Commun 14 1670-1671... 

Porphyrin-based self-assembled molecular squares 389 can form mesoporous thin films in which the edge of a square, thus the size of the cavity, can be adjusted by appropriate choice of substituents [8]. Fibers that form coil-coiled aggregates with distinct, tunable helicity are built from crown ethers bearing porphyrins 390 [9]. In addition to the porphyrin applications discussed in Sections 6.3.2.2 and 6.4, dendrimer metalloporphyrins 391 to be applied in catalysis [10] and the water-soluble dendritic iron porphyrin 319 modelling globular heme proteins [11] can be mentioned. 

Kavan L., Rathousky J., Gratzel M., Shklover V., Zukal A. (2001) Mesoporous thin film Ti02 electrodes, Microporous Mesoporous Mater., 44-45(6), 653-659. 

Wark, M., Tschirch, J., Bartels, O., Bahnemann, D. and Rathousky, J. (2005). Photocatalytic activity of hydrophobized mesoporous thin films of Ti02. Microporous Mesoporous Mater. 84(1-3), 247-253. 

The luminescence of a thin film coated with [Re(CO)3(/u.-4,4 -bipyridine)Cl]4 was quenched by nitrobenzene vapor because of electron transfer. Recently, mesoporous thin films of [Re(CO)3(/u.-L)Cl]4 (L = 4,4 -pyrazine or 4,4 -bipyridine) have been utilized as sensors for volatile organic compounds (VOCs). The host-guest interaction between the rhenium cyclophanes and VOCs was confirmed by quartz crystal microbalance studies. 

GENERAL METHODS FOR SYNTHESIS OF MESOPOROUS THIN FILMS... 

The most prevalent cationic surfactant used for mesoporous thin film synthesis is cetyltrimethylammonium bromide (CTAB). It is a large head group cationic surfactant and has been shown to produce 3-D cubic (Pm3n), 3-D hexagonal (P6 /mmc), and 2-D hexagonal mesostructures The resulting pore size of the... 

Clark T, Ruiz JD, Fan El, Brinker CJ, Swanson BJ, Parikh AN. 2000. A new application of uv ozone treatment in the preparation of substrate supported, mesoporous thin films. Chem Mater 12 3879 3884. 

Fig. 4.1 Preparation of mesoporous thin film polymer templates on suitable substrates, a Substrate surface modification tailoring a neutral surface, b Copolymer film deposition and phase transition to the double-gyroid morphology during thermal annealing, c Selective degradation of PLA yields the mesoporous template...

For further details on the preparation of mesoporous siHcas and carbons, organic-inorganic hybrid materials (PMOs), and mesoporous thin films, the reader is referred to several reviews [179]. 

Scheme 2 Depiction of size-selective permeation through a mesoporous thin film.

To date, research efforts regarding protective thin films have primarily focused on compact textures. In fact, smdies have confirmed that mesoporous thin films could confer corrosion protection for magnesium alloys. Furthermore, a mesoporous structure is beneficial to the integrity of the outer surface. This mesoporous structure could effectively release stress in the thin film and ameliorate the mismatch between the substrate and coating thus, crack-free thin films can be successfully prepared. In addition, smdies have reported that mesoporous thin films can easily induce apatite formation and have high bone-forming ability owing to the enhancement of cell activity and protein adsorption. ... 

Grazing incidence small-angle X-ray scattering Mesoporous thin films Critical reflectivity angle dependence on eleetron density (Renaud et al. 2009) (Maehara et al. 2000 Chamard et al. 2001)... 

In this case we addressed the preparation of ordered mesoporous thin films of rutile Ti02 nanocrystals embedded in amorphous Ta205 [200]. Non-silica oxides with ordered mesoporous structures are supposed to exhibit superior properties over nonporous counterparts in applications involving surface reactions requiring high specific surface area as well as highly accessible pores [201-204]. 

Litzelman SJ, Rothschild A, TuUer HL (2005) The electrical properties and stability of SrTi, jFe, jjOj 5 thin films for automotive oxygen sensor applications. Sens Actuators B 108 231-237 Liu P, Lee S-H, Tracy CE, Turner JA, Pitts JR, Deb SK (2003) Electrochromic and chemochromic performance of mesoporous thin-film vanadium oxide. Solid State Ionics 165 223-228 Liu RQ, Xie YH, Wang JD, Li ZJ, Wang BH (2006) Synthesis of ammonia at atmospheric pressure with Ce M Oj-delta (M=La, Y, Gd, Sm) and their proton conduction at intermediate temperature. Solid State Ionics 177 73-76 Logothetis EM (1980) Resistive-type exhaust gas sensors. Ceram Eng Sd Proc 2 281-301... 

Formation of Ordered Mesoporous Thin Films Through Templating... 

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