Phase diagram of a lipid monolayer on the surface of water

Journal Article · Mon Jul 09 04:00:00 EDT 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.65.191· OSTI ID:6667393

Lin, B; Shih, M C; Bohanon, T M ^[1]; Ice, G E ^[2]; Dutta, P ^[3]

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1. Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208 (USA)
2. Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN (USA)
3. Department of Physics and Astronomy, Northwestern University, Evanston, IL (USA)

The monolayer isotherms of heneicosanoic acid show a variety of features in the range 1--8 {degree}C; such features are often assumed to be solid-fluid or fluid-fluid transitions. Using x-ray diffraction (and searching for in-plane and off-plane peaks) we find (a) two distinct distorted-hexagonal (DH) solids at high pressures, both with essentially vertical chains; (b) two distinct tilted-DH solids at intermediate pressures; and (c) an expanded solid at the lowest pressures. All plateaus'' in these isotherms are in-plane structural transitions; all kinks'' are solid-solid tilting transitions.

• DOE Contract Number: FG02-84ER45125
• OSTI ID: 6667393
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 65:2; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
CHAINS
COHERENT SCATTERING
DATA
DIAGRAMS
DIFFRACTION
DISPERSIONS
EXPERIMENTAL DATA
FILMS
HYDROGEN COMPOUNDS
INFORMATION
INTERFACES
ISOTHERMS
LIPIDS
MEDIUM TEMPERATURE
NUMERICAL DATA
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHASE DIAGRAMS
PRESSURE DEPENDENCE
SCATTERING
SUSPENSIONS
THIN FILMS
WATER
X-RAY DIFFRACTION