Organic materials most important feature

However, there are indications that some structures are favorable for the material deposition more than others. According to the growth and the deposition mechanisms described in Chapter 5, the most important feature of organic molecules, which determines the ease of material deposition in LCVD, is the presence or absence of chemical structures that split to form diradicals by the energy transfer reaction with electrons or excited species in the luminous gas phase. The double bonds, triple bonds, and cyclic structures are the major chemical structures that create the reactive species that could proceed via cycle II of the growth and the deposition mechanisms (Figure 5.3). Without these structures, molecules depend on hydrogen abstraction or the detachment of simple stable species such as HF and HCl to create free radicals. 

Various organic solvents have been applied for the synthesis of inorganic materials. Because most of inorganic synthesis researchers are not familiar with organic solvents, some important features are summarized here. 

The antibodies that function best in chromatography are not necessarily the same ones that are optimal in quantitative assays. Quantitative assays are competition assays, and for these assays, the highest affinity antibodies offer the g test sensitivity, while for affinity chromatography the reversibility of the binding, allowing recoveiy of the analyte from Ae column, may be the most important feature. In addition, the literature for me immunoaffinity purification of proteins indicates that pH 3 or 2M KSCN buffers are often sufficient to recover bound material, but the recovery of organic compounds often requires more harsh conditions, such as 50% Me0H/H20 or 50% DMSO/H2O (8i2). 

The important feature of polymers based on vinyl monomers is their transparency in the visible part of the spectrum. This is why the most important articles produced from these materials are organic glasses, which are used in the aircraft, automobile and ship-building industries as engineering materials, and also in civil engineering, and the optical, chemical, food industries, etc. The main technical characteristics of poly (methyl methacrylate) are given in Table 1.1. 

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