Electrodeposited silica

Figure 12.23 Optical images of (a, d) mild red color were peeled off. (g, h) Cross-steel/epoxy, (b, e) mild steel/phosphate/epoxy, sectional images of mild steel/electrodepos-and (c, f) mild steel/electrodeposited silica/ ited silica/epoxy paint on ITO. (Adapted with epoxy after cross-cut adhesion tape test (a-c) permission from Ref [78].) and Machu test (d-f).The areas marked with...

Sibottier, E., Sayen, S., Gaboriaud, F., and Walcarius, A. (2006) Factors affecting the preparation and properties of electrodeposited silica thin films functionalized with amine or thiol groups. Langmuir, 22, 8366-8373. 

D and 3-D metal nanowire thin films[263] with tunable 3-10 nm wire diameters have been obtained by electrodeposition into mesoporous silica thin-film templates, resulting in nanowire arrays that reflect the pore structure of the template. Removal of silica is achieved via annealing followed by etching to leave mechanically strong freestanding metal nanowire films. 

Wang D, Zhou WL, McCaughy BF, Hampsey JE, Ji Z, Jiang Y-B, HuifangXu TJ, Schmehl RH, O Connor C, Brinker CJ, Lu Y (2003) Electrodeposition of metaUic nanowire thin films using mesoporous silica templates. Adv Mater 15 130-133... 

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. ... 

Silica, silver, bioactive glass, heparin, and CaSiOs have been incorporated into the electrodeposition process of chitosan and HA to try and improve performance of composite coatings for biomedical implants that interface with bone tissue [116, 119, 134, 139, 149]. While the electrodeposition methods and mechanical and adhesion strength of the coatings are commonly reported in these studies, little biological data has been gathered on the response of cells or tissues to these composite coatings. 

Electrodeposition of silicon can be achieved from PC baths containing tetra-alkylammonium chlorides and SiHClj as the Si source Deposits on a variety of materials including low-cost substrates such as the Ti-6 Al-4 V alloy or coated fused silica were made. Both surface morphology and current decay resulting from the increase of electrical resistance of the growing Si film can be controlled by the cation size of the supporting electrolyte, R NCl. Bound hydrogen (SiH or SiH) can be driven off at 470 °C. The amorphous Si film exhibits photoconduction and photovoltaic properties and offers an inexpensive route for solar cell applications. 

EISA. The mechanism in each case has been the subject of much research and the current understanding of each mechanism is described below. The other two methods to produce mesoporous templated materials are electrodeposition,which has been successfully used to produce surfactant templated porous metal films from high concentration surfactant solutions, and nanocasting, where a surfactant templated silicate is used as a sacrificial template to generate further porous materials by coating the silica structure in another oxide or carbon precursors. The second material is sintered or solidified, and the silicate removed by HE or high pH solvent wash. This is discussed further in Section 2.10. 

Microcomposite formation of PPTA film with silica The electrodeposited PPTA film was dried at 100°C to 5 wt% of absorbed water, which was soaked in an ethanol solution of tetraethyl orthosilicate (TEOS) at 60 C for one day. Cross-linking polycondensation of silanol derived from TEOS and water... 

Several recent reports describe using clay or other inorganic fillers to form CP composites. Polyani-line-polypyrrole composite coatings containing clay or yttria stabilized zirconia were electrodeposited onto AA 2024-T3 [158], with improved corrosion resistance of the substrate. Similarly, particulate-filled polyaniline and polypyrrole films on AA 2024-T3 were prepared electrochemically using a variety of fillers, including clay, carbon black, short carbon fiber, zirconia, and silica [159]. Again, enhanced corrosion performance for these composites was observed. 

Based on colloidal monolayers of polystyrene spheres, we have prepared various two-dimensional nano-structured arrays by solution routes and electrodeposition. Many ordered structured arrays generated using these methods are of surface roughness on the nano- and micro-scales, and could be superhydrophobic or superhydrophilic. The nano-devices based on such nano-structured arrays would be waterproof and selfcleaning, in addition to their special device functions. In this article, taking silica, ZnO and gold as examples of the insulators, semiconductors and metals, respectively, we report some of our recent results to demonstrate controlled wettability and superhydrophobicity of two-dimensional ordered nano-stmctured arrays with centimeter square-size based on colloidal monolayers. 

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