Linked Life Data

17988162

Source:http://linkedlifedata.com/resource/pubmed/id/17988162

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
25
pubmed:dateCreated
2007-11-27
pubmed:abstractText
End-tethered polymer chains usually adopt mushroomlike structures on the surface when their density is low. The behaviors of these surface-attached hemicoils are described by existing polymer theory. Dolan and Edwards derived the free energy of a single polymer chain confined between two planar surfaces. Their theory was used to approximate the steric interaction free energy, E, of two identical surfaces bearing polymers in the mushroom regime and to compare with experimental data obtained from surface force measurements. However, because of a mislabeled plot in the original paper, experimental force profiles did not seem to fit the free energy approximation satisfactorily. We have correctly relabeled the involved plot and derived a new simple expression for E. In order to verify this expression, we have performed experiments on PEG45 polymers incorporated in lipid bilayers using a surface force apparatus. The measured force profiles are in perfect agreement with the prediction. We show that such measurements can be used to determine the local density of grafted polymer with good precision.
pubmed:commentsCorrections
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0743-7463
pubmed:author
pubmed:issnType
Print
pubmed:day
4
pubmed:volume
23
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
12541-8
pubmed:dateRevised
2008-3-27
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Confinement free energy of surfaces bearing end-grafted polymers in the mushroom regime and local measurement of the polymer density.
pubmed:affiliation
Laboratoire de Physique Statistique de l'Ecole Normale Supérieure, Associé aux Universités Paris 6 et Paris 7, CNRS UMR 8550, 24 rue Lhomond, 75005, Paris, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't