Chemical deposition conductive fibres

In the method of chemical deposition, conductive materials are deposited through chemical methods, thus the conductivity properties are obtained exclusively at the surface of the fibre. 

Conductive fibres obtained through chemical deposition of coatings... 

An alternative to chemical polymerisation for coating is electropolymerisation of monomers at electrodes performed either in aqueous, or in organic solutions. However, electro-polymerisation is strongly restricted by the use of conducting materials because an activation potential needs to be applied, and an electrical current should be able to flow in the electrodes. This implies that the initial fibre to be coated should already have conductive properties which limits the use of this method52. Frequently, electropolymerisation is used as a finishing touch after fibres have been treated with a chemical deposition, the latter providing the conductive properties to the fibre necessary to perform electro-polymerisation. 

Polymerization of pyrrole has also been carried out chemically by mixing the monomer with a homogeneous oxidant (Fe ) in solution. Mermillod et al [61] found that poly(pyrrole) synthesized in water by action of Fe ( 104)3 produces particles in solution as well as films on the reactor walls. The material was electrochemically identical with electropolymerized product. Gregory et al [62] chemically deposited very uniform films of poly(pyrrole) on textile fibres and woven glass cloth. Gottesfeld et al [63] found that chemically deposited films were uniform and could serve as a conducting substrate for metallization structures for microelectronic circuitry. Hillman et al [64] studied the electrodeposition of poly(vinylfer-rocene) with the quartz crystal microbalance. 

The hot-wall CVD process has a number of advantages over the cold-wall CVD process. These advantages are as follows (1) the thickness uniformity of the coating is better since the deposition temperature and temperature uniformity can be easily controlled in a relatively small chemical reaction chamber and (2) there is no requirement for the fibre and coating to be electrically conductive, hence this technique can be used to coat a large number of materials. 

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