Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland.
Soft Matter. 2017 Nov 8;13(43):7848-7855. doi: 10.1039/c7sm01645j.
The surface properties of polyelectrolyte multilayers (PEMs) obtained via sequential adsorption of oppositely charged polyions from their solutions and used as cushions for supported lipid bilayers were investigated. Five types of polyelectrolytes were used: cationic polyethyleneimine (PEI), poly(diallyldimethylammonium)chloride (PDADMAC), and poly-l-lysine hydrobromide (PLL); and anionic polysodium 4-styrenesulfonate (PSS) and poly-l-glutamic acid sodium (PGA). The wettability and surface free energy of the PEMs were determined by contact angle measurements using sessile drop analysis. Electrokinetic characterisation of the studied films was performed by streaming potential measurements of selected multilayers and the structure of the polyelectrolyte multilayer was characterized by synchrotron X-ray reflectometry. The examined physicochemical properties of the PEMs were correlated with the kinetics of the formation of supported lipid bilayers atop the PEM cushion.
通过从溶液中顺序吸附带相反电荷的聚离子来获得的聚电解质多层（PEM）的表面性质，并将其用作支撑脂质双层的缓冲垫进行了研究。使用了五种类型的聚电解质：阳离子聚乙烯亚胺（PEI）、聚二烯丙基二甲基氯化铵（PDADMAC）和聚-l-赖氨酸氢溴酸盐（PLL）；阴离子聚对苯乙烯磺酸钠（PSS）和聚-l-谷氨酸钠（PGA）。通过使用静滴分析的接触角测量来确定 PEM 的润湿性和表面自由能。通过选择的多层的流动电势测量对研究膜的电动特性进行了表征，并且通过同步加速器 X 射线反射计对聚电解质多层的结构进行了表征。用 PEM 垫顶的支撑脂质双层的形成动力学对 PEM 的检查理化性质进行了关联。
