Metallo-organic decomposition

Solution Deposition of Thin Films. Chemical methods of preparation may also be used for the fabrication of ceramic thin films (qv). MetaHo-organic precursors, notably metal alkoxides (see Alkoxides, metal) and metal carboxylates, are most frequently used for film preparation by sol-gel or metallo-organic decomposition (MOD) solution deposition processes (see Sol-GEL technology). These methods involve dissolution of the precursors in a mutual solvent control of solution characteristics such as viscosity and concentration, film deposition by spin-casting or dip-coating, and heat treatment to remove volatile organic species and induce crystaHhation of the as-deposited amorphous film into the desired stmcture. 

One key in dehning structural evolution, and thus, the resulting characteristics of the hnal him, is the chemical reactions that occur (intended or otherwise) during solution preparation. These reactions have been investigated in great detail for a variety of material systems, and the basic reaction chemistry for the more common processes is well understood. This chemistry lends itself to categorization into three divisions sol-gel, chelate, and metallo-organic decomposition (MOD) processes. These processes and their associated reaction chemistries are discussed below, prior to discussion of the role of solution species nature on structural evolution. 

The third general classification of solution synthesis approaches used for inorganic electronic thin film fabrication is referred to as metallo-organic decomposition, or MOD for short.23-29,37,38,85 Historically long-chain carboxylate compounds, such as lead 2-ethylhexanoate, zirconium neodecanoate, and titanium di-methoxy di-neodecanoate have been used.23-29,85 Both commercially available precursors and in-house synthesized starting reagents have been used. 

Vest, G. Vest, R. 1984. Metallo-organic decomposition (MOD) silver metallization for photovoltaics. JPL Proceedings of the 23rd Project Integration Meeting (NASA Center for AeroSpace Information Pasadena, CA). (Document ID. 19850006969). 

Wang, Y. and Santiago-Aviles, J.J. 2004. Synthesis of lead zirconate titanate nanofibres and the Fourier-transform infrared characterization of their metallo-organic decomposition process. Nanotechnolosv 15 32-36. 

Parelec PARMOD Drill, laser, or photodielectric Metallo-organic decomposition, Cu or Ag... 

Platinum Platinum-coated titanium is the most important anode material for impressed-current cathodic protection in seawater. In electrolysis cells, platinum is attacked if the current waveform varies, if oxygen and chlorine are evolved simultaneously, or if some organic substances are present Nevertheless, platinised titanium is employed in tinplate production in Japan s. Although ruthenium dioxide is the most usual coating for dimensionally stable anodes, platinum/iridium, also deposited by thermal decomposition of a metallo-organic paint, is used in sodium chlorate manufacture. Platinum/ruthenium, applied by an immersion process, is recommended for the cathodes of membrane electrolysis cells. ... 

Deposition occurs at much lower temperature (260-340°C) by the decomposition of metallo-organic compounds such as copper acetylacetonate, Cu(C5H202)2 or by the hydrogen reduction of the copper chelate, Cu(C5HFg02)2 at and more recently of... 

Since gold has a relatively low melting point, high-temperature reactions are notpossible. Itis deposited by the decomposition of metallo-organics suchasthefollowing ]... 

CVD Reactions. The rhodium halides, like those of the other platinum group metal s, are volatile with a decomposition pointtoo close to the vaporization point to make them usable for CVD transport. The metal is commonly produced by the decomposition of metallo-organic precur-... 

Titanium can also be produced by the thermal decomposition of metallo-organics such as tris-(2.2 bipyridine) titanium at < 600°C. The deposit tends to retain impurities such as C, N2, and... 

Solution-Liquid-Solid (SLS) growth of semiconductor nanowires by Wang etal. (2006). The synthesis proceeds by a solution-based catalysed growth mechanism in which nanometer-scale metallic droplets catalyse the decomposition of metallo-organic precursors and crystalline nanowire growth. 

The following approaches will be addressed (1) H202-assisted decomplexation of metallo-organic salts for ion-exchange, (2) om-pot synthesis of metal-exchanged-zeolites, and finally (3) room-temperature detemplation of parous solids (zeolites and mesoporous materials). The Fe-catalysts are comptued on the basis of their NaO-decomposition performance, both in pure N20/He and under simulated industrial conditions for nitric acid plants containing O2, NO and H2O. 

The thermal decompositions of inorganic and metallo-organic compounds can provide simpler synthetic routes for many materials. For instance, Nelis et al. 

Vapor-phase fibers are produced by the catalytic decomposition of a hydrocarbon such as methane or benzene. The seed catalysts are iron particles or iron metallo-organics such as ferrocene, (C5H5)2Fe. Growth occurs in the temperature range of 1000 -1150°C. 

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