On the helium‐alkali halide surface potential: Surface corrugation vs ionic size

1985 ◽  
Vol 83 (1) ◽  
pp. 417-422 ◽  
Author(s):  
L. Miglio ◽  
F. Quasso ◽  
G. Benedek
Keyword(s):  
Surface Potential ◽  
Alkali Halide ◽  
Potential Surface ◽  
Surface Corrugation ◽  
Ionic Size

The properties of a family of two-headed surfactant systems: the 4-alkyl-3-sulfosuccinates 2. Surface properties of alkyl sulfosuccinate micelles

1999 ◽  
Vol 77 (3) ◽  
pp. 340-347 ◽  
Author(s):  
Judith A MacInnis ◽  
Greg D Boucher ◽  
R Palepu ◽  
D Gerrard Marangoni
Keyword(s):  
Surface Properties ◽  
Surface Potential ◽  
Surface Charge Density ◽  
Potential Surface ◽  
Ultra Violet ◽  
Palisade Layer ◽  
Acid Base ◽  
Micellar Properties ◽  
Head Groups ◽  
Surface Potential Measurements

The micellar properties of a family of two-headed surfactants, the alkyl sulfosuccinates, were investigated employing fluorescence, ultra-violet spectroscopy, and acid-base titrations, as a function of the chain length of the surfactant. Polarity of the micellar interior was investigated using pyrene and the ionic probe 8-anilino-1-naphthalensulfonic acid ammonium salt (ANS). Pyrene I1/I3 ratios were used to probe the microenvironment of the probe in the palisade layer of the micelle. The pKa values of both of the anionic head groups were determined using acid-base titrations. Surface potential measurements were obtained from the measurement of the pKa of the hydrophobic indicator, 7-hydroxycoumarin, at the sulfosuccinate micellar interface. All of these results were used to examine the surface properties of the alkyl sulfosuccinate micelles and the polarity of the micellar interior.Key words: micellization, pKa, surface potential, surface charge density, 7-hydroxycoumarin, pyrene.

A how-to approach for estimation of surface/Stern potentials considering ionic size and polarization

The Analyst ◽  
2015 ◽  
Vol 140 (21) ◽  
pp. 7217-7224 ◽  
Author(s):  
Xinmin Liu ◽  
Feinan Hu ◽  
Wuquan Ding ◽  
Rui Tian ◽  
Rui Li ◽  
...  
Keyword(s):  
Surface Potential ◽  
Diffuse Layer ◽  
Stern Layer ◽  
Stern Potential ◽  
Ionic Size ◽  
The Relationship ◽  
Ionic Volume

Based on the effects of ionic volume in Stern layer and polarization in diffuse layer, the relationship between surface potential and Stern potential is quantified.

The effects of surface absorbed monolayer microdiffraction patterns

1988 ◽  
Vol 46 ◽  
pp. 680-681
Author(s):  
M. Pan ◽  
J.M. Cowley
Keyword(s):  
Surface Potential ◽  
Electron Probe ◽  
Potential Distribution ◽  
Crystal Surface ◽  
Normal Direction ◽  
Surface Image ◽  
Extended Surface ◽  
Gas Molecules ◽  
Surface Nature ◽  
Electron Microdiffraction

Electron microdiffraction patterns, obtained when a small electron probe with diameter of 10-15 Å is directed to run parallel to and outside a flat crystal surface, are sensitive to the surface nature of the crystals. Dynamical diffraction calculations have shown that most of the experimental observations for a flat (100) face of a MgO crystal, such as the streaking of the central spot in the surface normal direction and (100)-type forbidden reflections etc., could be explained satisfactorily by assuming a modified image potential field outside the crystal surface. However the origin of this extended surface potential remains uncertain. A theoretical analysis by Howie et al suggests that the surface image potential should have a form different from above-mentioned image potential and also be smaller by several orders of magnitude. Nevertheless the surface potential distribution may in practice be modified in various ways, such as by the adsorption of a monolayer of gas molecules.

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