Abstract
A simple and well-ordered fabrication procedure for polymeric thin filmswith nanopores and nanogrooves is described. By utilizing the neutralsurface of self-assembled monolayers (SAMs) of commercially available3-(p-methoxyphenyl)propyltrichlorosilane (MPTS), the cylindrical microdomains of PMMA of the asymmetricpolystyrene-b-poly(methylmethacrylate) (PS-b-PMMA) block copolymer were oriented perpendicular to the surface dueto the balanced interfacial interactions of the blocks with the surface. Thinfilms with perpendicularly oriented lamellae without mixed lamellae couldalso be fabricated by simply using a binary blend of the same asymmetricPS-b-PMMA diblock copolymer and PMMA homopolymer in the wet-brush regimeup to 50% of the total PMMA weight fraction on the same neutral surface.Nanotemplates with arrays of nanopores and nanogrooves were fabricated byselective removal of PMMA domains via ultraviolet (UV) irradiation and sequentialwashing. SAMs of MPTS on a substrate with aluminium oxide surface were alsofabricated and were used to fabricate nanoporous thin film. A thin film ofPS-b-PEO with perpendicularly oriented poly(ethylene oxide) (PEO) domains on the SAMs ofMPTS is also demonstrated.
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