UNIVERSALITY IN INTERACTING MEMBRANES - THE EFFECT OF COSURFACTANTS ON THE INTERFACIAL RIGIDITY
UNIVERSALITY IN INTERACTING MEMBRANES - THE EFFECT OF COSURFACTANTS ON THE INTERFACIAL RIGIDITY
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DOI：
10.1103/physrevlett.62.1134
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发表时间：
1989-03-06
影响因子：
8.6
通讯作者：
SMITH, GS
中科院分区：
文献类型：
--
作者：
SAFINYA, CR;SIROTA, EB;SMITH, GS
报道了流体Lα相中多膜体系的同步辐射X射线散射研究。通过将共表面活性剂分子嵌入到模型生物膜(二肉豆蔻基磷酰胆碱)体系中，我们极大地降低了流体双层的弯曲刚性。这种效应导致了从微观驱动到波动诱导的膜间相互作用的普遍机制的交叉。对碳氢链长在5到12之间的同系助表面活性剂的研究，使我们能够将kc的这种降低归因于膜的变薄。
We report on synchrotron x-ray scattering studies of multimembrane systems in the fluid L α phase. By embedding cosurfactant molecules in a model biological membrane (di-myristoyl-phosphoridyl-choline) system, we dramatically reduce the bending rigidity of the fluid bilayer. This effect leads to a crossover from a microscopically driven to a fluctuation-induced universal regime for intermembrane interactions. Studies of a homologous cosurfactant series, with varying hydrocarbon chain length between 5 and 12, allow us to attribute this reduction in k c to the thinning of the membrane.