Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 108, Issue 14, Pages 5522-5525Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1014100108
Keywords
-
Categories
Funding
- US-Israel Binational Science Foundation, Jerusalem
- Department of Energy [DE-AC02-76CH0016]
Ask authors/readers for more resources
Hydrophobicity, the spontaneous segregation of oil and water, can be modified by surfactants. The way this modification occurs is studied at the oil-water interface for a range of alkanes and two ionic surfactants. A liquid interfacial monolayer, consisting of a mixture of alkane molecules and surfactant tails, is found. Upon cooling, it freezes at T-s, well above the alkane's bulk freezing temperature, T-b. The monolayer's phase diagram, derived by surface tensiometry, is accounted for by a mixtures-based theory. The monolayer's structure is measured by high-energy X-ray reflectivity above and below T-s. A solid-solid transition in the frozen monolayer, occurring approximately 3 degrees C below T-s, is discovered and tentatively suggested to be a rotator-to-crystal transition.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available