Hydrodynamics of quantized shape transitions of lipid domains
Hydrodynamics of quantized shape transitions of lipid domains
复制标题
脂质结构域量子化形状转变的流体动力学
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
H. Mcconnell
中科院分区：
文献类型：
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作者：
H. Stone;H. Mcconnell
近圆形的液体域的脂质在空气-水界面的时间依赖性的扭曲进行了研究分析占线张力和静电效应在单层和粘性效应在单层和亚相流体。形状变化的一个驱动力来自分子偶极子之间的静电排斥。这种力与有利于圆形形状的线张力相反。小振幅扰动的增长率被确定为失真（方位角）对称数n，域半径，偶极密度差和线张力之间的脂质域和周围的脂质层，和单层和底层液体的粘度的函数。对于代表性的参数值，扰动增长率是独立的单层粘度，只取决于亚相粘度。
The time-dependent distortions of nearly circular liquid domains of lipids at the air-water interface are studied analytically by accounting for line tension and electrostatic effects in the monolayer and viscous effects in both the monolayer and subphase fluid. One driving force for the shape changes arises from the electrostatic repulsions between molecular dipoles. This force is opposed by a line tension that favors circular shapes. The growth rate of small amplitude disturbances is determined as a function of the distortion (azimuthal) symmetry number n, the domain radius, the dipole density difference and line tension between the lipid domain and the surrounding lipid layer, and the viscosities of the monolayer and underlying liquid. For representative parameter values, the disturbance growth rate is independent of the monolayer viscosity and depends only on the subphase viscosity.