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Curvature-induced lipid segregation |
| Zheng Bin (郑斌)a b, Meng Qing-Tian (孟庆田)a, Robin L. B. Selingerc, Jonathan V. Selingerc, Ye Fang-Fu (叶方富)b |
a College of Physics and Electronics, Shandong Normal University, Jinan 250014, China;
b Beijing National Laboratory for Condensed Matter Physics and Key Laboratory of Soft Matter Physics of Chinese Academy of Sciences, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
c Liquid Crystal Institute, Kent State University, Kent, OH 44242, USA |
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Abstract We investigate how an externally imposed curvature influences lipid segregation on two-phase-coexistent membranes. We show that the bending-modulus contrast of the two phases and the curvature act together to yield a reduced effective line tension. On largely curved membranes, a state of multiple domains (or rafts) forms due to a mechanism analogous to that causing magnetic-vortex formation in type-II superconductors. We determine the criterion for such a multi-domain state to occur; we then calculate respectively the size of the domains formed on cylindrically and spherically curved membranes.
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Received: 03 April 2015
Revised: 08 April 2015
Accepted manuscript online:
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PACS:
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87.16.dt
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(Structure, static correlations, domains, and rafts)
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64.75.St
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(Phase separation and segregation in thin films)
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61.30.Dk
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(Continuum models and theories of liquid crystal structure)
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Corresponding Authors:
Ye Fang-Fu
E-mail: fye@iphy.ac.cn
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| About author: 87.16.dt; 64.75.St; 61.30.Dk |
Cite this article:
Zheng Bin (郑斌), Meng Qing-Tian (孟庆田), Robin L. B. Selinger, Jonathan V. Selinger, Ye Fang-Fu (叶方富) Curvature-induced lipid segregation 2015 Chin. Phys. B 24 068701
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