Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2006-02-21
Physics
Condensed Matter
Soft Condensed Matter
7 pages, 6 figures
Scientific paper
10.1143/JPSJ.76.054602
A swollen phase, in which the mean repeat distance of lipid bilayers is larger than the other phases, is found between the liquid-crystalline phase and the interdigitated gel phase in DPPC aqueous solution. Temperature, pressure and ethanol concentration dependences of the structure were investigated by small-angle neutron scattering, and a bending rigidity of lipid bilayers was by neutron spin echo. The nature of the swollen phase is similar to the anomalous swelling reported previously. However, the temperature dependence of the mean repeat distance and the bending rigidity of lipid bilayers are different. This phase could be a precursor to the interdigitated gel phase induced by pressure and/or adding ethanol.
Hishida Mafumi
Nagao Makoto
Nobutou H.
Seto Hideki
Takeda Takaaki
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