dc.citation.conferencePlace |
US |
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dc.citation.title |
2017 APS March Meeting |
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dc.contributor.author |
Kim, Dong Hyup |
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dc.contributor.author |
Kim, So Youn |
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dc.date.accessioned |
2023-12-19T19:36:07Z |
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dc.date.available |
2023-12-19T19:36:07Z |
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dc.date.created |
2017-10-24 |
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dc.date.issued |
2017-03-17 |
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dc.description.abstract |
Block copolymers (BCPs) can be self-assembled forming periodic nanostructures, which have been employed in many applications. While general agreements exist for the phase diagrams of BCP self-assembly in bulk or thin films, a fundamental understanding of BCP structures at the air/water interface still remain elusive. The current study explains morphology transition of BCPs with relative fraction of each block at the air/water interface: block fraction is the only parameter to control the morphology. In this study, we show morphology transitions from spherical to cylindrical and planar structures with neat polystyrene-b-poly(2-vinylpyridine) (PS-b-P2VP) via reducing the spreading area of BCP solution at the air/water interface. For example, PS-b-P2VP in a fixed block fraction known to form only spheres can experience sphere to cylinder or lamellar transitions depending on the spreading area at the air/water interface. Suggesting a new parameter to control the interfacial assembly of BCPs, a complete phase diagram is drawn with two paramters: relative block fraction and spreading area. We also explain the morphology transition with the combinational description of dewetting mechanism and spring effect of hydrophilic block. |
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dc.identifier.bibliographicCitation |
2017 APS March Meeting |
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dc.identifier.uri |
https://scholarworks.unist.ac.kr/handle/201301/39411 |
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dc.language |
영어 |
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dc.publisher |
American Physical Society |
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dc.title |
General Mechanism of Morphology Transition and Spreading Area-dependent Phase Diagram of Block Copolymer Self-assembly at the Air/Water Interface |
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dc.type |
Conference Paper |
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dc.date.conferenceDate |
2017-03-13 |
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