Symmetry-breaking in double gyroid block copolymer films by non-affine distortion
DC Field | Value | Language |
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dc.contributor.author | Jo, S. | - |
dc.contributor.author | Park, H. | - |
dc.contributor.author | Jun, T. | - |
dc.contributor.author | Kim, K. | - |
dc.contributor.author | Jung, H. | - |
dc.contributor.author | Park, S. | - |
dc.contributor.author | Lee, B. | - |
dc.contributor.author | Lee, S. | - |
dc.contributor.author | Ryu, D.Y. | - |
dc.date.accessioned | 2021-12-02T08:42:05Z | - |
dc.date.available | 2021-12-02T08:42:05Z | - |
dc.date.created | 2021-08-31 | - |
dc.date.issued | 2021-06 | - |
dc.identifier.issn | 2352-9407 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/128842 | - |
dc.description.abstract | Soft-matter bicontinuous networks find a double gyroid structure from block copolymer (BCP) self-assembly. A gyroid structure composed of dissimilar blocks has proven its potential as a soft crystal capable of tuning structural periodicity and symmetry, of which the lattice dimension is variable with molecular weight of the polymer. Using an asymmetric polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA), here we show that the self-assembled gyroid films formed via a solvent vapor annealing (SVA) process undergo unique structural distortion due to directional deformation immediately upon deswelling. During the SVA process with PS-b-PMMA films, transient cylinders developed from the as-cast morphology transform into a cubic gyroid structure in a swollen state. Rapid and spontaneous deswelling processes ̶ the manners in which the films contract along the z-direction while retaining an enlarged lateral dimension of the cubic form ̶ lead to triclinic gyroid structures with z-directional contraction ratios (Cz) of 2.5 and 2.0, respectively. Our X-ray analysis reveals that the deswelling process of the swollen gyroid films produces a notable symmetry-breaking in non-affine gyroid structure that elicits several forbidden reflections such as {110} and {200} reflections. For further characterization of the symmetry-breaking, we delineate the structural features of noncubic gyroid films by computing electron-density difference maps assisted with X-ray measurements. Level-set approach is accordingly developed to quantitate the structural characteristics of the maps in terms of inversion symmetry-breaking, suggesting its possible application to optical Weyl photonic crystals. © 2021 Elsevier Ltd | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | Elsevier Ltd | - |
dc.title | Symmetry-breaking in double gyroid block copolymer films by non-affine distortion | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Lee, S. | - |
dc.identifier.doi | 10.1016/j.apmt.2021.101006 | - |
dc.identifier.scopusid | 2-s2.0-85102883350 | - |
dc.identifier.wosid | 000667468400071 | - |
dc.identifier.bibliographicCitation | Applied Materials Today, v.23 | - |
dc.relation.isPartOf | Applied Materials Today | - |
dc.citation.title | Applied Materials Today | - |
dc.citation.volume | 23 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.subject.keywordPlus | THIN-FILMS | - |
dc.subject.keywordPlus | SOLVENT | - |
dc.subject.keywordPlus | MORPHOLOGIES | - |
dc.subject.keywordAuthor | Gyroid | - |
dc.subject.keywordAuthor | Non-affine distortion | - |
dc.subject.keywordAuthor | Solvent vapor annealing | - |
dc.subject.keywordAuthor | Symmetry-breaking | - |
dc.subject.keywordAuthor | Weyl point | - |
dc.subject.keywordAuthor | Z-directional contraction | - |
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