AFM study of phase-separated morphology in immiscible blend thin films |
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Authors: | Seo Young-Soo Kim Eusung Kwon Soo Yong Jing Huaiyu Shin Kwanwoo |
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Affiliation: | Department of Nano Science & Technology, Sejong University, Seoul 143-737, Republic of Korea. |
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Abstract: | Phase-separation behavior of polystyrene (PS) and poly(methyl methacrylate) (PMMA) 1:1 blend film has been studied as a function of film thickness and component by adding PS-b-PMMA diblock copolymer. After annealing, PS is phase-separated into circular-shaped bumps on a PMMA layer. The bump number is inversely proportional to the film thickness in log-log plot while the slope is invariable for the blends with and without 5% PS-b-PMMA diblock copolymer. The bump size and inter-bump spacing are also affected by both the film thickness and addition of the block copolymer. |
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Keywords: | Polymer thin film Nanopatterning Scanning probe microscopy Nanostructures |
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