SiOx, grafting

Block Copolymers Grafted from SiOx and Au Surfaces. 124... 

By also using the LASIP procedure, grafted PS-b-PI and PBd-b-PS block copolymers have been prepared (Fig. 7) [72]. Using silane and thiol-DPE initiators, polymerization was carried out on the SiOx and Au surface by sequential addition of monomers. Typically, after allowing this first reaction to reach completion, the second monomer was added to the living anion, and polymerization of the second block was allowed to proceed. The polymerization was also investigated by SPS [80], AFM, ellipsometry, FT-IR, and XPS. The schematic diagram for the reaction on Au surfaces and the formation of the block copolymers is shown in Fig. 6. The results are summarized in Table 2. 

Figure 16 Glass temperature of atactic PMMA measured by ellipsometry (filled symbols) and by dielectric spectroscopy (open symbols) as afunction of the layer thickness for different substrates (a) hydrophilic Si/SiOx, (b) hydrophobic gold substrate, (c) hydrophobic hexamethyidisilazane surface, and (d) covalent grafting of PMMA chains (PMMA brushes) on the Si/SiO substrate. From Erber, M., Tress, M., Mapesa, E. U., Serghei, A., Eichhom, K.-J.,...

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