| 학회 |
한국고분자학회 |
| 학술대회 |
2022년 봄 (04/06 ~ 04/08, 대전컨벤션센터) |
| 권호 |
47권 1호 |
| 발표분야 |
고분자구조 및 물성 |
| 제목 |
Non-affinely distorted Double Gyroid structures in Solvent-vapor-annealed Polystyrene-b-Poly(methyl methacrylate) Films |
| 초록 |
In this study, we investigate symmetry-breaking nature of double gyroid structure in solvent-vapor-annealed polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA) films. During the optimized solvent vapor annealing process, as-cast morphology transforms into a cubic gyroid structure via transient cylinders in a swollen state. Immediately upon rapid deswelling, however, the PS-b-PMMA films undergo a contraction along the direction normal to the substrate. Interestingly, we reveal the non-affine distortion in the contracted gyroid structure by grazing-incidence small-angle X-ray scattering patterns that involve diffraction spots forbidden in a cubic gyroid structure. We further elucidate the symmetry-breaking features of gyroid structures by close observation of electron density difference maps. Moreover, level-set reconfiguration based on X-ray results suggest inversion symmetry-breaking in the PS-b-PMMA gyroid films that can lead to possible application of optical Weyl photonic crystals. |
| 저자 |
조승연1, 박해동2, 전태석1, 이병두3, 이승우2, 류두열1
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| 소속 |
1연세대, 2고려대, 3Argonne National Laboratory |
| 키워드 |
double gyroid; block copolymer; self-assembly; symmetry-breaking; non-affine distortion
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| E-Mail |
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