TY - JOUR
T1 - Temperature dependence of the organization and molecular interactions within phospholipid/diacetylene Langmuir films
AU - Gaboriaud, F.
AU - Volinsky, R.
AU - Berman, A.
AU - Jelinek, R.
N1 - Funding Information:
R.J. is grateful to the Reimund Staedler Minerva Center for Mesoscopic Macromolecular Engineering, funded through the BMBF, and the Israel Science Foundation (Grant 678/01) for generous assistance. R.J. and F.G. are grateful for funding through the Arc-en-Ciele Program (2003–2004).
PY - 2005/7/1
Y1 - 2005/7/1
N2 - Surface pressure-area isotherms and Brewster angle microscopy images of mixed binary films of dimyristoylphosphatidylcholine (DMPC) and the diacetylene 10,12-tricosadiynoic acid (TRCDA) were recorded at different temperatures and mole ratios to investigate the molecular interactions and cooperative properties of the films. The experiments revealed that segregation, on the one hand, and significant intermolecular interactions, on the other hand, both contribute to the thermodynamic properties of the phospholipids and the diacetylene assemblies. In particular, the data demonstrate that higher temperatures and greater percentage of DMPC promote repulsion between the liquid-condensed phospholipid monolayer and the TRCDA domains. In contrast, at high TRCDA mole ratios, film contraction occurred (lower molecular areas) due to TRCDA multilayer formation (at high temperature) or intermolecular affinities (at low temperature).
AB - Surface pressure-area isotherms and Brewster angle microscopy images of mixed binary films of dimyristoylphosphatidylcholine (DMPC) and the diacetylene 10,12-tricosadiynoic acid (TRCDA) were recorded at different temperatures and mole ratios to investigate the molecular interactions and cooperative properties of the films. The experiments revealed that segregation, on the one hand, and significant intermolecular interactions, on the other hand, both contribute to the thermodynamic properties of the phospholipids and the diacetylene assemblies. In particular, the data demonstrate that higher temperatures and greater percentage of DMPC promote repulsion between the liquid-condensed phospholipid monolayer and the TRCDA domains. In contrast, at high TRCDA mole ratios, film contraction occurred (lower molecular areas) due to TRCDA multilayer formation (at high temperature) or intermolecular affinities (at low temperature).
KW - Brewster angle microscopy
KW - Langmuir films
KW - Phospholipid films
KW - Polydiacetylene
UR - http://www.scopus.com/inward/record.url?scp=19444369103&partnerID=8YFLogxK
U2 - 10.1016/j.jcis.2005.01.110
DO - 10.1016/j.jcis.2005.01.110
M3 - Article
AN - SCOPUS:19444369103
SN - 0021-9797
VL - 287
SP - 191
EP - 197
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
IS - 1
ER -