Very long range attractive forces between uncharged hydrocarbon and fluorocarbon surfaces in water
A new method has been used to carry out accurate measurements of the hydrophobic interaction between uncharged hydrocarbon and fluorocarbon monolayer-coated surfaces in a surface force apparatus. The measurable range of the attraction between these deposited monolayers extends to a separation of 80 nm in conductivity water and can be approximated by an exponential function with two decay lengths of 2-3 and 13-16 nm, respectively. There is only a slight difference in the strength of the interaction between the fluorocarbon and hydrocarbon surfaces, in contrast to the significant difference in hydrophobicity as measured by the advancing contact angle of water. The authors suggest that the much shorter range attractive forces measured between monolayer adsorbed from solution are due to the formation of partial bilayers. They speculate that the very long range hydrophobic interaction found here is related to the metastability of water films between very hydrophobic surfaces.
- Research Organization:
- Australian National Univ., Canberra
- OSTI ID:
- 5306861
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 92:6; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
DATA
DISTANCE
EXPERIMENTAL DATA
FILMS
FLUID MECHANICS
HYDROCARBONS
HYDRODYNAMICS
HYDROGEN COMPOUNDS
INFORMATION
INTERACTION RANGE
INTERFACES
MATERIALS
MECHANICS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXYGEN COMPOUNDS
SHIELDING MATERIALS
WATER