Electrophoretic properties of dodecyltrimethylammonium bromide micelles in KBr solution

Sabaté, Raimon; Gallardo, Montserrat; Estelrich, Joan

doi:10.1002/(sici)1522-2683(20000201)21:3<481::aid-elps481>3.0.co;2-9

Cited by 26 publications

(25 citation statements)

References 15 publications

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“…[46][47][48][49] The zeta potential of a micelle is one of the most useful physicochemical properties of a micelle. Although there is a debate on whether the shear plane corresponds to the real surface or not, the rigorous definition of the micellar surface is of no physical significance because micelles are dynamic systems that are subject to continuous thermal perturbation.…”

Section: -45supporting

confidence: 88%

Hydration of Ions in Confined Spaces and Ion Recognition Selectivity

2009

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The hydration of ions in confined spaces, such as the interior of ion-exchange resins, micelles, and surface monolayers, is discussed on the basis of results obtained with X-ray absorption fine structure studies, electrophoresis, and ion-transfer voltammetry. The general trends are that anions are partly dehydrated therein, whereas cations are likely to keep their first hydration shells. For bromide ions, the hydration numbers under various circumstances have been determined. The extents of dehydration depend not only on the structure of the cationic sites electrostatically attracting bromide ions but also on whether the cationic sites are exposed to a solution or are effectively shielded from it. These findings will be useful for designing the systems for ionic recognition and separation.

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Section: -45supporting

confidence: 88%

Hydration of Ions in Confined Spaces and Ion Recognition Selectivity

2009

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“…Surfactants such as sodium dodecyl sulfate (SDS) have shown to inhibit the fibril formation,32–34 providing the surfactant is in micellar form. Given that the DTAB concentration was more than 60‐fold higher than that of Aβ and that the CMC of DTAB is less than 15 mmol · dm −3 ,35 the solution contains an excess of micelles over Aβ molecules. As can be observed in Figure 4, both curves have the same shape, with the only difference that the curve obtained with DTAB is delayed.…”

Section: Discussionmentioning

confidence: 99%

An autocatalytic reaction as a model for the kinetics of the aggregation of β‐amyloid

2003

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Alzheimer's disease is the commonest form of senile dementia, affecting almost 20 million people worldwide. This neurodegenerative disorder is characterized by amyloid deposition in senile plaques, composed primarily of fibrils of an aggregated peptide, beta-amyloid. Fibrillation of beta-amyloid is a nucleation-dependent polymerization process, which is controlled by two kinetics parameters: the nucleation rate and the elongation or growth rate. As the kinetics of fibrillation is strongly dependent on the presence of trace amounts of fibrils, we suggest that the aggregation of beta-amyloid is a model of autocatalytic reaction. A mathematical analysis, permitting quantitative monitoring of the kinetics of fibrillogenesis of beta-amyloid, nucleation, and elongation constants, is presented. The model was checked by applying it to the aggregation of the fragment 1-40 of the beta-amyloid. Understanding of these rate constants may facilitate the study of the effect of substances used for controlling fibril creation and growth. The disaggregating effect of dodecyl trimethylammonium bromide, a cationic surfactant, was easily quantified by means of the model.

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“…Over the years, and especially in the past decade, there have been quite a number of reports of premicelles, using a large variety of experimental techniques -steady-state and time-resolved fluorescence spectroscopy [26][27][28][29][30][31][32][33][34], fluorescence correlation spectroscopy (FCS) [35], UV absorption spectroscopy [36], dielectric relaxation spectroscopy [37], NMR [38], electrophoresis [39], and diffusion coefficient via radioactive labeling [40]. As an example, Fig.…”

Section: Metastable Premicelles and Stable Micellesmentioning

confidence: 99%

Free energy approach to micellization and aggregation: Equilibrium, metastability, and kinetics

Diamant

Andelman

2016

Current Opinion in Colloid & Interface Science

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We review a recently developed micellization theory, which is based on a free-energy approach and offers several advantages over the conventional one, based on mass action and rate equations. As all the results are derived from a single free-energy expression, one can adapt the theory to different scenarios by merely modifying the initial expression. We present results concerning various features of micellization out of equilibrium, such as the existence of metastable aggregates (premicelles), micellar nucleation and growth, transient aggregates, and final relaxation toward equilibrium. Several predictions that await experimental investigation are discussed.

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Electrophoretic properties of dodecyltrimethylammonium bromide micelles in KBr solution

Cited by 26 publications

References 15 publications

Hydration of Ions in Confined Spaces and Ion Recognition Selectivity

Hydration of Ions in Confined Spaces and Ion Recognition Selectivity

An autocatalytic reaction as a model for the kinetics of the aggregation of β‐amyloid

Free energy approach to micellization and aggregation: Equilibrium, metastability, and kinetics

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