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Title:Lipid layers on polyelectrolyte multilayer supports
Authors:ID Fischlechner, Martin (Author)
ID Zaulig, Markus (Author)
ID Meyer, Stefan (Author)
ID Estrela-Lopis, Irina (Author)
ID Cuéllar, Luis (Author)
ID Irigoyen, Joseba (Author)
ID Pescador, Paula (Author)
ID Brumen, Milan (Author)
ID Messner, Paul (Author)
ID Moya, Sergio (Author)
ID Donath, Edwin (Author)
Files:URL http://dx.doi.org/10.1039/b805754k
 
Language:English
Work type:Unknown
Typology:1.01 - Original Scientific Article
Organization:FNM - Faculty of Natural Sciences and Mathematics
Abstract:The mechanism of formation of supported lipid layers from phosphatidylcholine and phosphatidylserine vesicles in solution on polyelectrolyte multilayers was studied by a variety of experimental techniques. The interaction of zwitterionic and acidic lipid vesicles, as well as their mixtures, with polyelectrolyte supports was followed in real time by micro-gravimetry. The fabricated lipid-polyelectrolyte composite structures on top of multilayer coated colloidal particles were characterized by flow cytometry and imaging techniques. Lipid diffusion over the macroscopic scale was quantified by fluorescence recovery after photobleaching, and the diffusion was related to layer connectivity. The phospholipid-polyelectrolyte binding mechanism was investigated by infrared spectroscopy. A strong interaction of polyelectrolyte primary amino groups with phosphate and carboxyl groups of the phospholipids, leading to dehydration, was observed. Long-range electrostatic attraction was proven to be essential for vesicle spreading and rupture. Fusion of lipid patches into a homogeneous bilayer required lateral mobility of the lipids on the polyelectrolyte support. The binding of amino groups to the phosphate group of the zwitterionic lipids was too weak to induce vesicle spreading, but sufficient for strong adsorption. Only the mixture of phosphatidylcholine and phosphatidylserine resulted in the spontaneous formation of bilayers on polyelectrolyte multilayers. The adsorption of phospholipids onto multilayers displaying quarternary ammonium polymers produced a novel 3D lipid polyelectrolyte structure on colloidal particles.
Keywords:biophysics, lipids, lipid layers, electrolytes, multilayer supports
Year of publishing:2008
PID:20.500.12556/DKUM-35744 New window
UDC:577.115:53.082.75
ISSN on article:1744-683X
COBISS.SI-ID:16347912 New window
NUK URN:URN:SI:UM:DK:MSZNVRRZ
Publication date in DKUM:07.06.2012
Views:1862
Downloads:77
Metadata:XML DC-XML DC-RDF
Categories:Misc.
:
FISCHLECHNER, Martin, ZAULIG, Markus, MEYER, Stefan, ESTRELA-LOPIS, Irina, CUÉLLAR, Luis, IRIGOYEN, Joseba, PESCADOR, Paula, BRUMEN, Milan, MESSNER, Paul, MOYA, Sergio and DONATH, Edwin, 2008, Lipid layers on polyelectrolyte multilayer supports. Soft matter [online]. 2008. [Accessed 2 April 2025]. Retrieved from: http://dx.doi.org/10.1039/b805754k
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Record is a part of a journal

Title:Soft matter
Publisher:Royal Society of Chemistry
ISSN:1744-683X
COBISS.SI-ID:19616551 New window

Secondary language

Language:English
Keywords:biofizika, lipidi, lipidne plasti, elektroliti


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