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Bicyclic Topology Transforms Self-Assembled Nanostructures in Block Copolymer Thin Films

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Title: Bicyclic Topology Transforms Self-Assembled Nanostructures in Block Copolymer Thin Films
Authors: Ree, Brian J. Browse this author
Satoh, Yusuke Browse this author
Isono, Takuya Browse this author
Satoh, Toshifumi Browse this author →KAKEN DB
Keywords: topological block copolymers
phase separated nanostructures
topological alteration
thin film morphology
unidirectional orientation
grazing incidence
X-ray scattering
Issue Date: 9-Sep-2020
Publisher: American Chemical Society
Journal Title: Nano letters
Volume: 20
Issue: 9
Start Page: 6520
End Page: 6525
Publisher DOI: 10.1021/acs.nanolett.0c02268
Abstract: Ongoing efforts in materials science have resulted in linear block copolymer systems that generate nanostructures via the phase separation of immiscible blocks; however, such systems are limited with regard to their domain miniaturization and lack of orientation control. We overcome these limitations through the bicyclic topological alteration of a block copolymer system. Grazing incidence X-ray scattering analysis of nanoscale polymer films revealed that bicyclic topologies achieve 51.3-72.8% reductions in domain spacing when compared against their linear analogue, which is more effective than the theoretical predictions for conventional cyclic topologies. Moreover, bicyclic topologies achieve unidirectional orientation and a morphological transformation between lamellar and cylindrical domains with high structural integrity. When the near-equivalent volume fraction between the blocks is considered, the formation of hexagonally packed cylindrical domains is particularly noteworthy. Bicyclic topological alteration is therefore a powerful strategy for developing advanced nanostructured materials for microelectronics, displays, and membranes.
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright c American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see, see].
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 佐藤 敏文

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