title: Thermomechanic-electrical coupling in phospholipid monolayers near the critical point.
abstract: Lipid monolayers have been shown to represent a powerful tool in studying mechanical and thermodynamic properties of lipid membranes as well as their interaction with proteins. Using Einstein's theory of fluctuations we here demonstrate that an experimentally derived linear relationship both between transition entropy S and area A as well as between transition entropy and charge q implies a linear relationships between compressibility κT, heat capacity cπ, thermal expansion coefficient αT, and electric capacity CT. We demonstrate that these couplings have strong predictive power as they allow calculating electrical and thermal properties from mechanical measurements. The precision of the prediction increases as the critical point TC is approached.
authors.affiliation: Experimental Physics I, University of Augsburg, Universitätstsr. 1, D-86159 Augsburg, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Steppich
authors.forename: J
authors.initials: J
authors.lastname: Griesbauer
authors.forename: T
authors.initials: T
authors.lastname: Frommelt
authors.forename: W
authors.initials: W
authors.lastname: Appelt
authors.forename: A
authors.initials: A
authors.lastname: Wixforth
authors.forename: M F
authors.initials: MF
authors.lastname: Schneider
mesh_terms: D015060:1,2-Dipalmitoylphosphatidylcholine / Q000737:chemistry; D000465:Algorithms; D001703:Biophysics / Q000379:methods*; D002151:Calorimetry / Q000379:methods; D004134:Dimyristoylphosphatidylcholine / Q000737:chemistry; D005229:Fatty Acids, Monounsaturated / Q000737:chemistry; D006358:Hot Temperature; D008055:Lipids / Q000737:chemistry; D008566:Membranes / Q000737:chemistry; D010715:Phosphatidylglycerols / Q000737:chemistry; D010743:Phospholipids / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D015203:Reproducibility of Results; D013696:Temperature
chemical_list: D005229:Fatty Acids, Monounsaturated; D008055:Lipids; D010715:Phosphatidylglycerols; D010743:Phospholipids; D000644:Quaternary Ammonium Compounds; D015060:1,2-Dipalmitoylphosphatidylcholine; C002773:dimyristoylphosphatidylglycerol; C070046:1,2-dioleoyloxy-3-(trimethylammonium)propane; D004134:Dimyristoylphosphatidylcholine