Curvature-induced lipid segregation  

作　　者：郑斌 孟庆田 Robin L.B.Selinger Jonathan V.Selinger 叶方富 

机构地区：[1]College of Physics and Electronics,Shandong Normal University [2]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 [3]Liquid Crystal Institute,Kent State University

出　　处：《Chinese Physics B》2015年第6期95-99,共5页中国物理B（英文版）

基　　金：Project supported by the Hundred-Talent Program of the Chinese Academy of Sciences(FY);the National Science Foundation of USA via Grant DMR-1106014(RLBS,JVS)

摘　　要：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.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.

关 键 词：CURVATURE phase separation lipid membrane RAFTS 

分 类 号：O484[理学—固体物理]