Authors Minko, S. ; Müller, M. ; Usov, D. ; Scholl, A. ; Froeck, C. ; Stamm, M.
Title Lateral versus Perpendicular Segregation in Mixed Polymer Brushes
Date 10.01.2002
Number 10101
Abstract Grafting of incompatible polymers on a substrate prevents macrophase separation and the chains self-assemble laterally. Mixed brushes are exposed to different solvents and the morphology is observed via atomic force and x-ray photoemission microscopy. In a nonselective solvent the different species segregate into parallel cylinders ("ripple structure"). Upon exposure to a selective solvent, we encounter a transition to a "dimple" structure, in which the unfavored component forms clusters. Simultaneously, we observe an enhanced perpendicular segregation. The experimental observations are compared to self-consistent field calculations, where qualitative agreement is found.
Publisher Physical Review Letters
Wikidata Q61609134
Citation Physical Review Letters 88 (2002) 35502, 1-4
Tags surface separation layer films thin

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