X-ray and neutron surface scattering for studying lipid/polymer assemblies at the air–liquid and solid–liquid interfaces

Jaroslaw Majewski , Tonya L. Kuhl , Joyce Y. Wong , Gregory S. Smith
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引用次数: 28

Abstract

Simple mono- and bilayers, built of amphiphilic molecules and prepared at air–liquid or solid–liquid interfaces, can be used as models to study such effects as water penetration, hydrocarbon chain packing, and structural changes due to head group modification. In the paper, we will discuss neutron and X-ray reflectometry and grazing incidence X-ray diffraction techniques used to explore structures of such ultra-thin organic films in different environments. We will illustrate the use of these methods to characterize the morphologies of the following systems: (i) polyethylene glycol-modified distearoylphosphatidylethanolamine monolayers at air–liquid and solid–liquid interfaces; and (ii) assemblies of branched polyethyleneimine polymer and dimyristoylphophatidylcholine lipid at solid–liquid interfaces.

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x射线和中子表面散射在气-液和固-液界面研究脂质/聚合物组件
两亲分子在气-液或固-液界面上制备的简单单层和双层,可以作为研究水渗透、烃链填充和头基修饰引起的结构变化等影响的模型。在本文中,我们将讨论中子和x射线反射法以及掠入射x射线衍射技术用于探索不同环境下这种超薄有机薄膜的结构。我们将说明使用这些方法来表征以下系统的形态:(i)在空气-液体和固体-液体界面上聚乙烯乙二醇修饰的二硬脂酰磷脂酰乙醇胺单层;支化聚乙烯亚胺聚合物和二肉芽酰基磷脂酰胆碱脂在固液界面的组装。
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