Bending elasticity of surfactant films: the role of the hydrophobic tails
Bending elasticity of surfactant films: the role of the hydrophobic tails
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表面活性剂薄膜的弯曲弹性：疏水尾部的作用
DOI：
10.1103/physrevlett.85.337
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发表时间：
2000
影响因子：
8.6
通讯作者：
A. Würger
中科院分区：
文献类型：
--
作者：
A. Würger
我们研究了尾部对两亲层弹性常数的贡献。对于稠密系统，由吸引的货车德瓦耳斯相互作用产生的项占优势，而在较低密度下，液体层的平移熵是必不可少的。膜的刚性kappa和高斯弯曲弹性常数kappa i都随烃链的密度而强烈变化;对于致密系统，它们的数量级为100 kT，比率kappa i/kappa = -2/3。在较低密度下，相互作用和熵贡献的部分抵消导致kT量级的弹性常数，其比率接近于微乳液观察到的值-2。
We study the tail contributions to the elastic constants of an amphiphilic layer. For dense systems the terms arising from the attractive van der Waals interactions prevail, whereas the translational entropy of the liquid layer is essential at lower density. Both the membrane rigidity kappa and the Gaussian bending elastic constant kappa; strongly vary with the density of the hydrocarbon chains; for dense systems, they are of the order 100kT with a ratio kappa;/kappa = -2 / 3. At lower density, partial cancellation of interaction and entropic contributions leads to elastic constants of the order of kT, with a ratio close to the value -2 observed for microemulsions.