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We use a series of molecular dynamics simulations, and analytical theory, to demonstrate that a system of hard spheres confined to a narrow cylindrical channel exhibits a continuous phase transition from an isotropic fluid at low densities,…

软凝聚态物质 · 物理学 2014-09-18 Mahdi Zaeifi Yamchi , Richard K. Bowles

We consider the lateral diffusion of a protein interacting with the curvature of the membrane. The interaction energy is minimized if the particle is at a membrane position with a certain curvature that agrees with the spontaneous curvature…

软凝聚态物质 · 物理学 2008-12-10 Stefan M. Leitenberger , Ellen Reister-Gottfried , Udo Seifert

When considering flows in biological membranes, they are usually treated as flat, though more often than not, they are curved surfaces, even extremely curved, as in the case of the endoplasmic reticulum. Here, we study the topological…

流体动力学 · 物理学 2021-05-27 Rickmoy Samanta , Naomi Oppenheimer

The biological function of membranes is closely related to their softness, which is often studied through the membranes' thermally-driven fluctuations. The analysis commonly assumes that the relaxation rate of a pure bending deformation is…

软凝聚态物质 · 物理学 2024-07-09 Hammad A. Faizi , Rony Granek , Petia M. Vlahovska

Dynamic organization of the cytoskeletal filaments and rod-like proteins in the cell membrane and other biological interfaces occurs in many cellular processes. Previous modeling studies have considered the dynamics of a single rod on fluid…

流体动力学 · 物理学 2022-06-17 Wenzheng Shi , Moslem Moradi , Ehssan Nazockdast

We present a method for simulating fluid vesicles with in-plane orientational ordering. The method involves computation of local curvature tensor and parallel transport of the orientational field on a randomly triangulated surface. It is…

生物物理 · 物理学 2015-05-18 N. Ramakrishnan , P. B. Sunil Kumar , John H. Ipsen

Motivated by recent experiments on biomimetic membranes exposed to several aqueous phases, we theoretically study the morphology of a membrane in contact with a liquid droplet formed via aqueous phase separation. We concentrate on membranes…

软凝聚态物质 · 物理学 2012-02-07 Halim Kusumaatmaja , Reinhard Lipowsky

The shapes of cell membranes are largely regulated by membrane associated, curvature active, proteins. We use a numerical model of the membrane with elongated membrane inclusions, recently developed by us, which posses spontaneous…

生物物理 · 物理学 2013-02-08 N. Ramakrishnan , P. B. Sunil Kumar , John H. Ipsen

We study the mobility of extended objects (rods) on a spherical liquid-liquid interface to show how this quantity is modified in a striking manner by both the curvature and the topology of the interface. We present theoretical calculations…

软凝聚态物质 · 物理学 2009-11-13 Mark L. Henle , R. McGorty , A. D. Dinsmore , Alex J. Levine

We found that the order for the crumpling transition of an intrinsic curvature model changes depending on the distance between two boundary vertices fixed on the surface of spherical topology. The model is a curvature one governed by an…

统计力学 · 物理学 2007-05-23 H. Koibuchi

Biological membranes are host to proteins and molecules which may form domain-like structures resulting in spatially-varying material properties. Vesicles with such heterogeneous membranes can exhibit intricate shapes at equilibrium and…

软凝聚态物质 · 物理学 2023-06-22 Prerna Gera , David Salac , Saverio E. Spagnolie

How condensed-matter simulations depend on the number of molecules being simulated ($N$) is sometimes itself a valuable piece of information. Liquid crystals provide a case in point. Light scattering and $2d$-IR experiments on…

软凝聚态物质 · 物理学 2024-12-20 Eleftherios Mainas , Richard M. Stratt

Morphological change of bilayer membrane in vivo is not a spontaneous procedure but modulated by various types of proteins in general. Most of these modulations are associated with the localization of related proteins in the crowded lipid…

定量方法 · 定量生物学 2016-06-30 Michael Mikucki , Y. C. Zhou

The dynamics of membrane undulations inside a viscous solvent is governed by distinctive, anomalous, power laws. Inside a viscoelastic continuous medium these universal behaviors are modified by the specific bulk viscoelastic spectrum. Yet,…

软凝聚态物质 · 物理学 2018-02-20 Rony Granek , Haim Diamant

An interface description and numerical simulations of model A kinetics are used for the first time to investigate the intra-surface kinetics of phase ordering on corrugated surfaces. Geometrical dynamical equations are derived for the…

统计力学 · 物理学 2015-06-25 Oliver Schoenborn , Rashmi C. Desai

Spatiotemporal patterns in multicellular systems are important to understanding tissue dynamics, for instance, during embryonic development and disease. Here, we use a multiphase field model to study numerically the behavior of a…

软凝聚态物质 · 物理学 2025-02-13 Michael Chiang , Austin Hopkins , Benjamin Loewe , M. Cristina Marchetti , Davide Marenduzzo

We construct a coarse-grained effective two-dimensional (2d) hydrodynamic theory as a theoretical model for a coupled system of a fluid membrane and a thin layer of a polar active fluid in its ordered state that is anchored to the membrane.…

软凝聚态物质 · 物理学 2012-11-15 Niladri Sarkar , Abhik Basu

The adhesion dynamics of a membrane confined between two permeable walls is studied using a two-dimensional hydrodynamic model. The membrane morphology decomposes into adhesion patches on the upper and the lower walls and obeys a nonlinear…

软凝聚态物质 · 物理学 2014-09-16 Thomas Le Goff , Paolo Politi , Olivier Pierre-Louis

We use direct numerical simulations and scaling arguments to study coarsening in binary fluid mixtures with a conserved order parameter in the droplet-spinodal regime -- the volume fraction of the droplets is neither too small nor symmetric…

统计力学 · 物理学 2021-09-21 Akshay Bhatnagar , Prasad Perlekar , Dhrubaditya Mitra

In this paper, I study the coarsening dynamics of two-dimensional dry foam sandwiched by deformable membranes. The time-varying deformation of the confining membranes gives rise to a significant alteration in the evolution of polygonal…

软凝聚态物质 · 物理学 2009-06-02 Hiroyuki Shima
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