Adsorption of counterions to a stearate monolayer spread at the water-air interface: A synchrotron x-ray study

Journal Article · Mon Dec 26 00:00:00 EST 1988 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.61.2941· OSTI ID:6623193

Bloch, J M; Yun, W B; Yang, X; Ramanathan, M; Montano, P A; Capasso, C

The near-total-external fluorescence technique was used to measure in situ the adsorption of a metal ion from a subphase solution to the liquid-air interface. For a monolayer formed by the spreading of stearic acid on a 10/sup -3/-mole/l solution of MnCl/sub 2/, the ratio of Mn ions segregated to the interface to the number of stearate molecules on the surface was determined as 0.6 +- 0.2. Surface extended x-ray-absorption fine-structure experiments revealed local order of Mn ions at the surface in the condensed phase but no order showed in the expanded phase. We explain these findings using a self-consistent Poisson-Boltzmann calculation.

• Research Organization: Exxon Research and Engineering Company, Clinton Township, Annandale, New Jersey 08801
• OSTI ID: 6623193
• Journal Information: Phys. Rev. Lett.; (United States), Vol. 61:26
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AIR
SURFACE PROPERTIES
MANGANESE CHLORIDES
ADSORPTION
MANGANESE IONS
QUANTITY RATIO
SEGREGATION
WATER
ABSORPTION SPECTRA
FINE STRUCTURE
IN-SITU PROCESSING
INTERFACES
SOLUTIONS
SYNCHROTRON RADIATION
THIN FILMS
X-RAY FLUORESCENCE ANALYSIS
BREMSSTRAHLUNG
CHARGED PARTICLES
CHEMICAL ANALYSIS
CHLORIDES
CHLORINE COMPOUNDS
DISPERSIONS
ELECTROMAGNETIC RADIATION
FILMS
FLUIDS
GASES
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
IONS
MANGANESE COMPOUNDS
MANGANESE HALIDES
MIXTURES
NONDESTRUCTIVE ANALYSIS
OXYGEN COMPOUNDS
PROCESSING
RADIATIONS
SORPTION
SPECTRA
TRANSITION ELEMENT COMPOUNDS
X-RAY EMISSION ANALYSIS
360102* - Metals & Alloys- Structure & Phase Studies
360602 - Other Materials- Structure & Phase Studies