Metal-containing precursors thermolysis

A rare case is copolymerization of several different MCMs. Ihe resulting polymers can contain mixed units of various types. This is particularly true for the development of high-temperature superconducting (HTSC) ceramics that are based on synthesized prepolymers. One of the methods that is used is the copolymerization of MCM acrylates (and perhaps maleinates) or acrylamide complexes ofY, Ba, or Cu and the synthesis of superconducting bismufli cuprates (e.g., Bi2Sr2Ca -i Cu 02n+4-5 where n = l-3) by copolymerization of the corresponding metal-containing monomers. Thermolysis of these polymeric precursors affords a finely... 

Another way of the metallocomposite production by the precursor thermolysis is the metal carbonyl decomposition in the halide-containing matrices. Using the above-mentioned classification, such methods can be related to the passive ones. The PETF modifications can be performed by Fe or Mn ... 

The method of preparing superparamagnetic particles developed by Charmot [109] uses hydrophobic non-porous polystyrene seed particles of narrow size distribution. A seeded polymerization is carried out to increase the particle size (1.35 pm) and a terpolymer is formed around the seed particles by a dispersion polymerization of styrene, DVB and 4-vinylpyridine in toluene. The toluene containing cobalt precursor swells the latex particles, which results in a homogeneous distribution of the metal precursor. A thermolysis reaction is conducted in the presence of 4-vinylpyridine, and the release of carbon monoxide indicates the decomposition of the metal salt into cobalt. The main problem of this method is the particle surface deformation during the evolution of carbon monoxide. The amount of crosslinker, however, cannot be reduced below a certain level without significantly modifying the properties of the particles. 

CdS Nanoparticles Thermal decomposition has been one of the most efficient pathways for synthesizing CdS nanoparticles. In a typical thermolysis process, a cadmium thiolate powder is heated so as to nucleate CdS particles which are then grown to the desired size by controlled reaction of precursor molecules. Some of the major synthesis methods used are summarized in Table 2. A single source precursor made by reacting cadmium metal ions and a molecule containing the sulphur in a complexing solution of trioctylphosphine (TOP), trioctylphosphineoxide (TOPO), hexadecylamine (HDA), tetradecylamine (TDA) trioctylamine (TOA) or dodecylamine (DA) has been used to produce CdS nanoparticles [197-201]. 

---