Surface energy of phospholipid bilayers and the correlation to their hydration

被引：9

作者：

Klapper, Yvonne ^{[1
,2
,3
]}

Vranceanu, Marcel ^{[1
]}

Ishitsuka, Yuji ^{[2
,3
]}

Evans, David ^{[2
,3
]}

Scheider, Dominic ^{[1
]}

Nienhaus, Gerd Ulrich ^{[2
,3
,4
]}

Leneweit, Gero ^{[1
]}

机构：

[1] Assoc Promot Canc Therapy, Carl Gustav Carus Inst, D-75223 Niefern Oschelbronn, Germany

[2] Karlsruhe Inst Technol, Ctr Funct Nanostruct, D-76131 Karlsruhe, Germany

[3] Karlsruhe Inst Technol, Inst Appl Phys, D-76131 Karlsruhe, Germany

[4] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2013年 / 390卷

关键词：

SLB; PEG; Surface energy; Contact angle measurement; Hydration; CONTACT-ANGLE MEASUREMENTS; SUPPORTED LIPID-BILAYERS; PEG; NANOTECHNOLOGY; SIMULATION; PRESSURE; ANTIBODY; TENSION;

D O I：

10.1016/j.jcis.2012.09.027

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Supported lipid bilayers (SLBs) were prepared on glass and silicon slides grafted with polyethylene glycol (PEG) and covalently bound cholesteryl anchors to fix the lipid bilayer on the surface. Phospholipid bilayers and bilayers modified by addition of covalently bound PEG were investigated. Using contact angle measurements, the surface energy components of bilayer surfaces were analyzed using van Oss' and Owens-Wendt's methods. A quantitative correlation between the polar proton acceptor component of the surface energies and the respective hydration densities was proven for SLBs of pure lipids. We could show that the presence of PEG in the SLB produces a significant change of the proton acceptor component. Regarding the correlation between the surface energies and the hydration densities of SLBs with PEG, we were able to show a dependency on the PEG conformation. (C) 2012 Elsevier Inc. All rights reserved.

引用

页码：267 / 274

页数：8

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