Titel
Supported polymer/lipid hybrid bilayers formation resembles a lipid-like dynamic by reducing the molecular weight of the polymer
Autor*in
Francesca Cavallini
Department of Molecular Sciences and Nanosystems, Cà Foscari University of Venice
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Abstract
Amphiphilic block copolymers form self-assembled bilayers even in combination with phospholipids. They represent an attractive alternative to native lipid-based membrane systems for supported bilayer formation with applications in biomedical research, sensoring and drug delivery. Their enhanced stability and excellent mechanical properties are linked to their higher molecular weight which generates thicker bilayers. Hypothesis: It is hypothesized that reducing the molecular weight of the polymer facilitates the formation of a thinner, more homogeneous polymer/lipid hybrid bilayer which would benefit the formation of supported bilayers on silicon oxide. Experiment: We investigated hybrid bilayers composed of mixtures of 1-palmitoyl-2-oleoyl-glycero-3-phosphocholine and increasing amounts of a low molecular weight polybutadiene-b-polyethylene oxide copolymer (1050 g/mol). By assessing the bilayer thickness and the molecular packing behavior we sought to demonstrate how reducing the polymer molecular weight increases the tendency to form supported hybrid bilayers in a lipid-like manner. Findings: The formation of a supported hybrid bilayers occurs at polymer contents <70 mol% in a lipid-like fashion and is proportional to the cohesive forces between the bilayer components and inversely related to the bilayer hydrophobic core thickness and the extended brush regime of the PEGylated polymeric headgroup.
Stichwort
Supported bilayerQCM-DSANSHybrid lipid-polymer bilayerLangmuir filmsAmphiphilic copolymer
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
Erschienen in
Titel
Biochimica et Biophysica Acta (BBA) - Biomembranes
Band
1863
Ausgabe
1
ISSN
0005-2736
Erscheinungsdatum
2021
Publication
Elsevier BV
Projekt
Kod / Identifikator
I 2085-B20
Erscheinungsdatum
2021
Zugänglichkeit
Rechteangabe
© 2020 The Authors
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