The Electrical Double Layer and the Stability of Lyophobic Colloids.

Verwey, E. J. W.

doi:10.1021/cr60055a002

Cited by 68 publications

(35 citation statements)

References 43 publications

(56 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The senior author previously interpleted the response depression by the concept of the suppression of the electrokinetic potential due to an increase in ionic concentration of the solution (cf. VERWAY, 1935VERWAY, , 1950WATANABE, et al, 1961;WATANABE, 1964). Studies on the effects of the supporting electrolytes provided additional data which will support the above hypothesis.…”

Section: Discussionmentioning

confidence: 86%

Stimulation of the Chemoreceptors of the Sea Catfish by Dilute Electrolyte Solutions

Konishi

Hidaka

1967

Jpn.J.Physiol

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 86%

Stimulation of the Chemoreceptors of the Sea Catfish by Dilute Electrolyte Solutions

Konishi

Hidaka

1967

Jpn.J.Physiol

View full text Add to dashboard Cite

“…Since x-ray diffraction data do not give very exact information in regard to the constitution of the limits of the crystal lattices of the substances investigated when suspended in aqueous media, it is difficult to offer precise mechanisms explaining the behavior of the surfaces of the amino acids under discussion. A point of view which is derived from the analysis of the crystal structure and the electrophoretic behavior of the silver halides may be of service in this connection (reviewed by Abramson (23) and Verwey (24)). The reversal of the sign of charge of silver chloride crystals may be visualized by considering that at the limits of the crystal lattice one of each of the six ions of the lattice is lacking for each ion of Ag + and C1-.…”

Section: Discussionmentioning

confidence: 99%

Electrokinetic Phenomena

Abramson

Moyer

1938

Journal of General Physiology

View full text Add to dashboard Cite

1. Although the isoelectric points of dissolved cystine, tyrosine, and aspartic acid molecules lie at widely differing pH values, the isoelectric points of the surfaces of these substances in the crystalline state are all near pH 2.3. This was found to be true in solutions of hydrochloric acid and in acetate buffers of approximately constant ionic strength. 2. When suspended in gelatin, tyrosine and cystine crystals adsorb the protein and attain a surface identical in behavior with gelatin-coated quartz or collodion particles. 3. Aluminum ions at low concentrations reduce the electric mobilities of tyrosine crystals to zero in a manner analogous to their effect on other surfaces. 4. Alkyl benzene droplets also have their electric mobility reduced to zero at low pH values but, unlike the amino acids, a change in sign was never noticed. 5. The mobility of tyrosine crystals is independent of crystal length between 2–100µ. Below this size the mobilities are decreased. 6. These results are discussed in connection with the concept of the general definition of the isoelectric point and the behavior of certain insoluble proteins such as wool and silk fibroin.

show abstract

“…A classic example of this is the silver iodide (AgI) sol which was extensively used as the model colloid during the time when the DLVO theory was being established. (Verwey 1935). In the dispersing solution with excess amount of Ag + or I ---, the surface of the AgI nanoparticles is charged and the electrostatic repulsion between the charged surfaces stabilizes the particle suspension.…”

Section: Electrical Double Layer Interactionmentioning

confidence: 99%

Deposition of Silver Nanoparticles in Geochemically Heterogeneous Porous Media: Predicting Affinity from Surface Composition Analysis

Lin

Cheng

Bobcombe

et al. 2011

Environ. Sci. Technol.

View full text Add to dashboard Cite

This study focused on the effect of surface heterogeneity on the affinity of nanoparticle (for that surface) and the viability of using surface composition analysis to facilitate the prediction of such an affinity. The transport of the uncoated silver nanoparticles (AgNPs) in a porous medium composed of silica glass beads partially covered with iron oxide was studied and compared to that in a porous medium composed of unmodified glass beads (GB). It was found that at relative high pH (8.3) there existed only a small difference in AgNPs mobility in both porous media unless the ionic strength was sufficiently high while at lower pH (5) AgNPs had considerably lower affinity for the GB collectors compared to that of the iron oxide coated glass beads (FeO---GB) collectors, even at relative low ionic strengths. There was a linear correlation between the average nanoparticle affinity for media composed of mixtures of FeO---GB and GB collectors and the relative composition of those media as quantified by the mixing mass ratios of the two types of collectors, so that the average AgNPs affinity for these media is readily predicted from the mass (or surface) weighted average of affinities for each of the surface types. Using X---ray Photoelectron Spectroscopy (XPS) to quantify the composition of the collector surface appears to be a viable means to predict the affinity between the nanoparticles and a collector surface with known composition provided that a relevant correlation curve could be established from measured affinity between v the nanoparticles and collector surfaces with similar but different composition (i.e. surfaces with the same components but different proportion of each component). vi ContentsAbstract

show abstract

The Electrical Double Layer and the Stability of Lyophobic Colloids.

Cited by 68 publications

References 43 publications

Stimulation of the Chemoreceptors of the Sea Catfish by Dilute Electrolyte Solutions

Stimulation of the Chemoreceptors of the Sea Catfish by Dilute Electrolyte Solutions

Electrokinetic Phenomena

Deposition of Silver Nanoparticles in Geochemically Heterogeneous Porous Media: Predicting Affinity from Surface Composition Analysis

Contact Info

Product

Resources

About