Abstract
New ATRP and NMRP initiator molecules were synthesized, which were grafted on silica wafer surfaces and served for initiating the formation of polymer brushes via the grafting-from method. Two of the new initiators bore ATRP and NMRP moieties in the same molecule. These double initiators were used to produce binary polymer brushes with switchable surface properties: styrene was first polymerized via ATRP at 40°C and 4-vinylpyridine was polymerized thereafter at 110°C via NMRP. The brushes achieved in this way exhibited smooth surfaces differing in the thickness of the brush layers by less than 10% (at different areas of the wafers) and could be switched from hydrophobic to hydrophilic and vice versa.
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