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Preparation of heterogeneous nanoand microstructures by self-assembly and self-organization is one of the research interests in surface science with a large potential. Soft matter, like polymers are well suited to modify and functionalize surface properties over a wide range. Applications range from control of cell adhesion to the preparation of lithographic masks for semiconductor electronics. Spin-coating of block-copolymers or polymer blends has been used to prepare periodic structures on patterned [1, 2], and non-patterned substrates [3]. On the other hand, dewetting has been used to form periodic structures of polymer microdomes on substrates [4]. Here we study a polymer blend to fabricate a new morphology of phase-separated structures on substrates: isolated polymer microdomes in which the upper parts consist of polystyrene and the lower part of poly(methylmethacrylate).

Dewetting of Polymer Blends and Formation of Phase-Separated Polymer Domes