Spin casting technique

Figure 27 Sketch of the preparation of well-defined micellar monolayers by (a) spreading, (b) dipping/pull-casting, or (c) spin-casting-techniques...

Spin-casting techniques have also been used to prepare imprinted thin films. Makote and Collinson recently prepared metal oxide thin films imprinted with recognition sites for dopamine [18], The dopamine template was loaded at 4 mole % in a sol with a 10 1 ratio of tetramethoxysilane and phenyltrimethoxysilane. The prepared film had a thickness of ca. 450 nm. CV analysis found that 90% of the templates could be removed by washing the films with pH 7 phosphate buffer. The opened receptor sites offered selective binding for related molecules containing catechol amines, such as dopamine, epinephrine and norepinephrine, as determined by CV. The use of phenyltrimethoxysilane turns out to be an essential ingredient for the gel matrix and is believed to provide some complementary affinity for the catechol amines via hydrophobic and/or 7i-stacking interactions. 

Polymer Synthesis and Film Processing. T-AZODIOL and TDI or PDI in equivalent molar ratios were reacted in dimethylacetamide solution at 85°C for 20 - 30 min under nitrogen atmosphere to prepare T-polymer or T-polymer 2, respectively. Similarly, L-polymer and L-polymer 2 were prepared from AZODIOL with TDI and PDI, respectively. Molecular structures of these polymers are shown in Figure 2. A spin-casting technique was employed to prepare thin films for SHG measurements. 

With the slumping technique and the spin casting technique, the material consumed can be reduced drastically in comparison with the conventional technique, especially for workpieces with a large camber. Figure 4.19 shows the most economical manufacturing techniques for different diameters, thicknesses, and apertures. 

Fig. 4.19. The most economical manufacturing techniques for thin menisci for two relative apertures (f l, f 2) (A) conventional technique, (B) slumping technique, (C) spin casting technique...

Survey of the Manufacturing Cycle, The spin casting technique is used for the... 

The quality of the glass to be fed into the mould had to be improved for the manufacturing of the 8 m mirror substrates. In the spin casting technique, there is no longer the possibility to avoid glass faults such as bubbles, solid inclusions, crystals, and striae in the final machining, as there is with the conventional technique. 

Polysiloxane-based LSCEs are generally synthesized following the procedure in three steps developed for the first time by Kupfer and Finkelmann (1991). In the first step of the process, the different monomers, i.e. mesogen/s, cross-linker/s and comonomer/s, react through their terminal olefin with the Si-H groups of the main polysiloxane backbone via a Pt-catalysed hydrosilylation reaction which takes place at 50(X) rpm at 70 °C for 2 h by means of the spin-casting technique. It should... 

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