Surface energy of phospholipid bilayers and the correlation to their hydration.
J Colloid Interface Sci
; 390(1): 267-74, 2013 Jan 15.
Article
in En
| MEDLINE
| ID: mdl-23084557
ABSTRACT
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.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Phospholipids
/
Polyethylene Glycols
/
Silicon
/
Lipid Bilayers
Language:
En
Journal:
J Colloid Interface Sci
Year:
2013
Document type:
Article
Affiliation country:
Germany