HETEROGENEOUS SURFACES OF STRUCTURED HAIRY-ROD POLYMER-FILMS - PREPARATION AND METHODS OF FUNCTIONALIZATION

We report a versatile technique for the formation of a biofunctionaliz ed micrometer scale pattern on solids which is based on Langmuir-Blodg ett multilayers of hairy-rod polymers stabilized by partial photochemi cal cross-linking. Three types of polymer patterns consisting of hydro phobic and hydrophilic domains are generated. These structured films a re locally functionalized in two ways: (1) by activating the hairy-rod cushions with active esters and (2) by the deposition of a lipid mono layer onto the hydrophobic domains. For the latter procedure use is ma de of the fact that lipid monolayers are only assembled over domains w ith matched polarity. The fluidity and continuity of the monolayer dom ains was analyzed by lateral diffusion measurements on the basis of ph otobleaching techniques. The polarity of the domains is monitored by t he interference contrast microscopic observation of water microdrops d eposited on the structured hairy-rod films.