Chemical vapour deposition physical properties

Two-dimensional (2D) nanocrystals are now recognised as a new form of matter with unusual physical properties and a number of potential exciting applications. Recent developments in the field of two-dimensional nanocrystals such as the chemical modification of graphene and the isolation of monolayers of molybdenum disulfide and boron nitride are reviewed. The different techniques that have been employed to prepare the materials such as mechanical and solution exfoliation, and chemical vapour deposition are discussed briefly. The techniques employed to characterise these 2D materials are described and their properties discussed. Potential engineering applications of 2D materials in fields such as nanocomposites and catalysis are then described. 

In this chapter, we have discussed methods for obtaining of pol)4mides, chemical properties and physical parameters that are related with obtaining nanosized films by vapour deposition. It was discussed possibilities for the solid state synthesis of polyimides in thin film and applied microwave s)mthesis. The studies show that can be obtained homogeneous films without defects on the surface and volmne of layers with controlled density, thickness and dielectric properties. The developments of pol)mer chemistry produce polyimide films with covalent bonded chromophore to the chain. One of these achievements is our development a method for solid state s)mthesis of azo-pol3rimide. 

Polymer films produced by a glow discharge often possess chemical and physical properties that are superior to conventionally polymerized materials [110,111]. They are prepared by a totally dry vapour phase deposition process and may be conformally coated onto virtually any substrate, thereby completely changing the surface properties of the substrate. Further, the substrate may be cleaned by the plasma prior to deposition and, under the correct conditions, it is often possible to graft the deposited polymeric film to the underlying substrate. 

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