Topological Defects in Nematic Elastomers, Gels and Membranes
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459.57 MB,
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About this item
| Description: |
Uchida, N (Tohoku University)
Thursday 27 June 2013, 09:45-10:30 |
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| Created: | 2013-07-01 12:07 |
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| Collection: | The Mathematics of Liquid Crystals |
| Publisher: | Isaac Newton Institute |
| Copyright: | Uchida, N |
| Language: | eng (English) |
| Distribution: |
World
(downloadable)
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| Explicit content: | No |
| Aspect Ratio: | 16:9 |
| Screencast: | No |
| Bumper: | UCS Default |
| Trailer: | UCS Default |
| Abstract: | We review the structure and mechanical properties of topological defects in nematic elastomers and membranes. Nematic elastomers crosslinked in the isotropic phase (isotropic-genesis polydomains) exhibit anomalously soft mechanical response, which is explained by anisotropic orientational correlation in the polydomain state. In contrast, nematic-genesis polydomains show large mechanical stress due to memory of initial defect distributions. Orientation-curvature coupling in nematic membranes causes a correlation pattern similar to that of isotropic-genesis polydomains, which results in low-energy defected states and anomalously slow ordering kinetics. The notion of relative orientational correlation function is introduced to characterize the multi-defect states in these and other materials. |
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