Viscoelasticity of lyotropic smectics
| ISSN: |
1089-7690
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| Source: |
AIP Digital Archive
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| Topics: |
Physics
Chemistry and Pharmacology
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| Notes: |
We study theoretically the contribution of thermal fluctuations to the linear rheological spectrum of lyotropic smectic A phases at low frequencies. The fluctuations are treated at the Gaussian level; their hydrodynamics is controlled by the undulation/baroclinic mode. In the layer-over-layer sliding geometry, we find an anomalous elasticity varying as ||ω||; the corresponding viscous drag is enhanced logarithmically. For other shear geometries we find contributions to the dissipation and elasticity that are in practice small (though formally divergent when the layer spacing is taken to zero). The connection between these results and those given previously for thermotropic smectics, and for block copolymers, is discussed. We outline the possible experimental significance of our findings for the rheology of both aligned and polydomain smectics.
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| Type of Medium: |
Electronic Resource
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| URL: |
| _version_ | 1798289783432151042 |
|---|---|
| autor | Lu, C.-Y. D. Cates, M. E. |
| autorsonst | Lu, C.-Y. D. Cates, M. E. |
| book_url | http://dx.doi.org/10.1063/1.467377 |
| datenlieferant | nat_lic_papers |
| hauptsatz | hsatz_simple |
| identnr | NLZ219156670 |
| issn | 1089-7690 |
| journal_name | The Journal of Chemical Physics |
| materialart | 1 |
| notes | We study theoretically the contribution of thermal fluctuations to the linear rheological spectrum of lyotropic smectic A phases at low frequencies. The fluctuations are treated at the Gaussian level; their hydrodynamics is controlled by the undulation/baroclinic mode. In the layer-over-layer sliding geometry, we find an anomalous elasticity varying as ||ω||; the corresponding viscous drag is enhanced logarithmically. For other shear geometries we find contributions to the dissipation and elasticity that are in practice small (though formally divergent when the layer spacing is taken to zero). The connection between these results and those given previously for thermotropic smectics, and for block copolymers, is discussed. We outline the possible experimental significance of our findings for the rheology of both aligned and polydomain smectics. |
| package_name | American Institute of Physics (AIP) |
| publikationsjahr_anzeige | 1994 |
| publikationsjahr_facette | 1994 |
| publikationsjahr_intervall | 8009:1990-1994 |
| publikationsjahr_sort | 1994 |
| publikationsort | College Park, Md. |
| publisher | American Institute of Physics (AIP) |
| reference | 101 (1994), S. 5219-5228 |
| search_space | articles |
| shingle_author_1 | Lu, C.-Y. D. Cates, M. E. |
| shingle_author_2 | Lu, C.-Y. D. Cates, M. E. |
| shingle_author_3 | Lu, C.-Y. D. Cates, M. E. |
| shingle_author_4 | Lu, C.-Y. D. Cates, M. E. |
| shingle_catch_all_1 | Lu, C.-Y. D. Cates, M. E. Viscoelasticity of lyotropic smectics We study theoretically the contribution of thermal fluctuations to the linear rheological spectrum of lyotropic smectic A phases at low frequencies. The fluctuations are treated at the Gaussian level; their hydrodynamics is controlled by the undulation/baroclinic mode. In the layer-over-layer sliding geometry, we find an anomalous elasticity varying as ||ω||; the corresponding viscous drag is enhanced logarithmically. For other shear geometries we find contributions to the dissipation and elasticity that are in practice small (though formally divergent when the layer spacing is taken to zero). The connection between these results and those given previously for thermotropic smectics, and for block copolymers, is discussed. We outline the possible experimental significance of our findings for the rheology of both aligned and polydomain smectics. 1089-7690 10897690 American Institute of Physics (AIP) |
| shingle_catch_all_2 | Lu, C.-Y. D. Cates, M. E. Viscoelasticity of lyotropic smectics We study theoretically the contribution of thermal fluctuations to the linear rheological spectrum of lyotropic smectic A phases at low frequencies. The fluctuations are treated at the Gaussian level; their hydrodynamics is controlled by the undulation/baroclinic mode. In the layer-over-layer sliding geometry, we find an anomalous elasticity varying as ||ω||; the corresponding viscous drag is enhanced logarithmically. For other shear geometries we find contributions to the dissipation and elasticity that are in practice small (though formally divergent when the layer spacing is taken to zero). The connection between these results and those given previously for thermotropic smectics, and for block copolymers, is discussed. We outline the possible experimental significance of our findings for the rheology of both aligned and polydomain smectics. 1089-7690 10897690 American Institute of Physics (AIP) |
| shingle_catch_all_3 | Lu, C.-Y. D. Cates, M. E. Viscoelasticity of lyotropic smectics We study theoretically the contribution of thermal fluctuations to the linear rheological spectrum of lyotropic smectic A phases at low frequencies. The fluctuations are treated at the Gaussian level; their hydrodynamics is controlled by the undulation/baroclinic mode. In the layer-over-layer sliding geometry, we find an anomalous elasticity varying as ||ω||; the corresponding viscous drag is enhanced logarithmically. For other shear geometries we find contributions to the dissipation and elasticity that are in practice small (though formally divergent when the layer spacing is taken to zero). The connection between these results and those given previously for thermotropic smectics, and for block copolymers, is discussed. We outline the possible experimental significance of our findings for the rheology of both aligned and polydomain smectics. 1089-7690 10897690 American Institute of Physics (AIP) |
| shingle_catch_all_4 | Lu, C.-Y. D. Cates, M. E. Viscoelasticity of lyotropic smectics We study theoretically the contribution of thermal fluctuations to the linear rheological spectrum of lyotropic smectic A phases at low frequencies. The fluctuations are treated at the Gaussian level; their hydrodynamics is controlled by the undulation/baroclinic mode. In the layer-over-layer sliding geometry, we find an anomalous elasticity varying as ||ω||; the corresponding viscous drag is enhanced logarithmically. For other shear geometries we find contributions to the dissipation and elasticity that are in practice small (though formally divergent when the layer spacing is taken to zero). The connection between these results and those given previously for thermotropic smectics, and for block copolymers, is discussed. We outline the possible experimental significance of our findings for the rheology of both aligned and polydomain smectics. 1089-7690 10897690 American Institute of Physics (AIP) |
| shingle_title_1 | Viscoelasticity of lyotropic smectics |
| shingle_title_2 | Viscoelasticity of lyotropic smectics |
| shingle_title_3 | Viscoelasticity of lyotropic smectics |
| shingle_title_4 | Viscoelasticity of lyotropic smectics |
| sigel_instance_filter | dkfz geomar wilbert ipn albert |
| source_archive | AIP Digital Archive |
| timestamp | 2024-05-06T08:06:19.668Z |
| titel | Viscoelasticity of lyotropic smectics |
| titel_suche | Viscoelasticity of lyotropic smectics |
| topic | U V |
| uid | nat_lic_papers_NLZ219156670 |