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Advances in Colloid and Interface Science

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https://www.readbyqxmd.com/read/28803628/dominique-langevin-festschrift-four-decades-opening-gates-in-colloid-and-interface-science
#1
EDITORIAL
(no author information available yet)
No abstract text is available yet for this article.
August 5, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28800974/advances-in-the-synthesis-molecular-architectures-and-potential-applications-of-gemini-surfactants
#2
REVIEW
Renu Sharma, Ajar Kamal, Maryam Abdinejad, Rakesh Kumar Mahajan, Heinz-Bernhard Kraatz
Gemini surfactants have been the subject of intensive scrutiny by virtue of their unique combination of physical and chemical properties and being used in ordinary household objects to multifarious industrial processes. In this review, we summarize the recent developments of gemini surfactants, highlighting the classification of gemini surfactants based on the variation in headgroup polarity, flexibility/rigidity of spacer, hydrophobic alkyl chain and counterion along with potential applications of gemini surfactants, depicting the truly remarkable journey of gemini surfactants that has just come of age...
July 29, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28780963/effect-of-contact-angle-and-contact-angle-hysteresis-on-the-floatability-of-spheres-at-the-air-water-interface
#3
REVIEW
Dong-Xia Feng, Anh V Nguyen
The floatability of solid particles on the water surface governs many natural phenomena and industrial processes including film flotation and froth flotation separation of coal and valuable minerals. For many years, the contact angle (CA) has been postulated as the key factor in determining the particle floatability. Indeed, the maximum force (tenacity) supporting the flotation of fine spheres was conjectured to occur when the apical angle of the contact circle is equal to the contact angle. In this paper, the model predictions are reviewed and compared with experimental results...
July 28, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28807368/membrane-interactions-and-antimicrobial-effects-of-inorganic-nanoparticles
#4
REVIEW
Sara Malekkhaiat Häffner, Martin Malmsten
Interactions between nanoparticles and biological membranes are attracting increasing attention in current nanomedicine, and play a key role both for nanotoxicology and for utilizing nanomaterials in diagnostics, drug delivery, functional biomaterials, as well as combinations of these, e.g., in theranostics. In addition, there is considerable current interest in the use of nanomaterials as antimicrobial agents, motivated by increasing resistance development against conventional antibiotics. Here, various nanomaterials offer opportunities for triggered functionalites to combat challenging infections...
July 27, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28780961/natural-and-bioinspired-nanostructured-bactericidal-surfaces
#5
REVIEW
Abinash Tripathy, Prosenjit Sen, Bo Su, Wuge H Briscoe
Bacterial antibiotic resistance is becoming more widespread due to excessive use of antibiotics in healthcare and agriculture. At the same time the development of new antibiotics has effectively ground to a hold. Chemical modifications of material surfaces have poor long-term performance in preventing bacterial build-up and hence approaches for realising bactericidal action through physical surface topography have become increasingly important in recent years. The complex nature of the bacteria cell wall interactions with nanostructured surfaces represents many challenges while the design of nanostructured bactericidal surfaces is considered...
July 27, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28760412/interfacial-tension-of-reactive-liquid-interfaces-and-its-consequences
#6
REVIEW
Anaïs Giustiniani, Wiebke Drenckhan, Christophe Poulard
Dispersions of immiscible liquids, such as emulsions and polymer blends, are at the core of many industrial applications which makes the understanding of their properties (morphology, stability, etc.) of great interest. A wide range of these properties depend on interfacial phenomena, whose understanding is therefore of particular importance. The behaviour of interfacial tension in emulsions and polymer blends is well-understood - both theoretically and experimentally - in the case of non-reactive stabilization processes using pre-made surfactants...
July 24, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28764854/probing-foam-with-neutrons
#7
REVIEW
Alesya Mikhailovskaya, Li Zhang, Fabrice Cousin, François Boué, Pavel Yazhgur, François Muller, Cyprien Gay, Anniina Salonen
Foams are multiscale materials that have an enormous number of uses. As the relevant structural length-scales span from a few nanometres up to millimetres a number of characterisation methods need to be combined to obtain the full material structure. In this review we explain how foams can be explored using Small Angle Neutron Scattering (SANS). We remind the reader of the basics of SANS and contrast variation before we describe the different types of experiments that have been carried out on foams emphasising the specific role of neutrons in learning about the systems...
July 22, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28780962/applicability-of-the-gibbs-adsorption-isotherm-to-the-analysis-of-experimental-surface-tension-data-for-ionic-and-nonionic-surfactants
#8
REVIEW
L Martínez-Balbuena, Araceli Arteaga-Jiménez, Ernesto Hernández-Zapata, César Márquez-Beltrán
The Gibbs Adsorption Isotherm equation is a two-dimensional analogous of the Gibbs-Duhem equation, and it is one of the cornerstones of interface science. It is also widely used to estimate the surface excess concentration (SEC) for surfactants and other compounds in aqueous solution, from surface tension measurements. However, in recent publications some authors have cast doubt on this method. In the present work, we review some of the best available surface tension experimental data, and compare estimations of the SEC, using the Gibbs isotherm method (GIM), to direct measurements reported in the literature...
July 21, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28754382/recent-advances-in-studying-single-bacteria-and-biofilm-mechanics
#9
REVIEW
Catherine Even, Christian Marlière, Jean-Marc Ghigo, Jean-Marc Allain, Alba Marcellan, Eric Raspaud
Bacterial biofilms correspond to surface-associated bacterial communities embedded in hydrogel-like matrix, in which high cell density, reduced diffusion and physico-chemical heterogeneity play a protective role and induce novel behaviors. In this review, we present recent advances on the understanding of how bacterial mechanical properties, from single cell to high-cell density community, determine biofilm tri-dimensional growth and eventual dispersion and we attempt to draw a parallel between these properties and the mechanical properties of other well-studied hydrogels and living systems...
July 21, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28756970/phase-separated-surfactant-monolayers-exploiting-immiscibility-of-fluorocarbons-and-hydrocarbons-to-pattern-interfaces
#10
REVIEW
Matthew F Paige, Ala'a F Eftaiha
The mutual immiscibility of hydrogenated and fluorinated surfactants at interfaces frequently leads to phase-separation, which provides a useful and flexible method for patterning air-water and solid-air interfaces. In this article, we review recent advances in the use of hydrogenated-fluorinated surfactant mixtures to achieve interfacial patterning. For even relatively simple systems comprised of binary mixed monolayers of hydrogenated and perfluorinated fatty acids, a diverse range of film morphologies can be generated at the air-water interface and successfully transferred onto solid substrates...
July 20, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28755779/thermo-and-soluto-capillarity-passive-and-active-drops
#11
REVIEW
Yuri S Ryazantsev, Manuel G Velarde, Ramón G Rubio, Eduardo Guzmán, Francisco Ortega, Pilar López
A survey is provided of a variety of problems where a passive or an active drop experiences directed motion consequence of the action of an external or internal agent or a combination of both. An active drop is capable of reacting by engendering autonomous, self-propelled motion in favor or against the agent. The phenomena involved offer diverse complexity but one way or another the drop motion finally rests on thermo- or soluto-capillarity hence on interfacial tension gradients. Accordingly, here a minimal mathematical framework underlying such drop motions is provided when direct external temperature or solute gradients, illumination, internal heat generation or surface chemical reaction are incorporated into the physico-chemical-hydrodynamics...
July 20, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28754380/magnetocapillary-self-assemblies-locomotion-and-micromanipulation-along-a-liquid-interface
#12
REVIEW
G Grosjean, M Hubert, N Vandewalle
This paper presents an overview and discussion of magnetocapillary self-assemblies. New results are presented, in particular concerning the possible development of future applications. These self-organizing structures possess the notable ability to move along an interface when powered by an oscillatory, uniform magnetic field. The system is constructed as follows. Soft magnetic particles are placed on a liquid interface, and submitted to a magnetic induction field. An attractive force due to the curvature of the interface around the particles competes with an interaction between magnetic dipoles...
July 20, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28778342/films-of-bacteria-at-interfaces
#13
REVIEW
Liana Vaccari, Mehdi Molaei, Tagbo H R Niepa, Daeyeon Lee, Robert L Leheny, Kathleen J Stebe
Bacteria are often discussed as active colloids, self-propelled organisms whose collective motion can be studied in the context of non-equilibrium statistical mechanics. In such studies, the behavior of bacteria confined to interfaces or in the proximity of an interface plays an important role. For instance, many studies have probed collective behavior of bacteria in quasi two-dimensional systems such as soap films. Since fluid interfaces can adsorb surfactants and other materials, the stress and velocity boundary conditions at interfaces can alter bacteria motion; hydrodynamic studies of interfaces with differing boundary conditions are reviewed...
July 19, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28743366/the-enzymatic-sphingomyelin-to-ceramide-conversion-increases-the-shear-membrane-viscosity-at-the-air-water-interface
#14
REVIEW
Elisa R Catapano, Paolo Natale, Francisco Monroy, Iván López-Montero
Whereas most of lipids have viscous properties and they do not have significant elastic features, ceramides behave as very rigid solid assemblies, displaying viscoelastic behaviour at physiological temperatures. The present review addresses the surface rheology of lipid binary mixtures made of sphingomyelin and ceramide. However, ceramide is formed by the enzymatic cleavage of sphingomyelin in cell plasma membranes. The consequences of the enzymatically-driven ceramide formation involve mechanical alterations of the embedding membrane...
July 19, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28780230/self-assembly-phase-behaviour-and-structural-behaviour-as-observed-by-scattering-for-classical-and-non-classical-microemulsions
#15
REVIEW
Sylvain Prévost, Michael Gradzielski, Thomas Zemb
In this review, we discuss the conditions for forming microemulsions, systems which are thermodynamically stable mixtures of oil and water made stable by the presence of an interfacial film containing surface active molecules. There are several types of microemulsions, depending largely on the stiffness of the amphiphilic monolayer that separates the oily and the aqueous micro-domain. We first discuss and compare the phase behaviour of these different types, starting from the classical microemulsion made from a flexible surfactant film but then also moving on to less classical situations: this occurs when the interfacial film is stiff or when microemulsions are formed in the absence of a classical surfactant...
July 18, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28755780/dissipative-dynamics-of-fluid-lipid-membranes-enriched-in-cholesterol
#16
REVIEW
Laura R Arriaga, Ruddi Rodríguez-García, Lara H Moleiro, Sylvain Prévost, Iván López-Montero, Thomas Hellweg, Francisco Monroy
Cholesterol is an intriguing component of fluid lipid membranes: It makes them stiffer but also more fluid. Despite the enormous biological significance of this complex dynamical behavior, which blends aspects of membrane elasticity with viscous friction, their mechanical bases remain however poorly understood. Here, we show that the incorporation of physiologically relevant contents of cholesterol in model fluid membranes produces a fourfold increase in the membrane bending modulus. However, the increase in the compression rigidity that we measure is only twofold; this indicates that cholesterol increases coupling between the two membrane leaflets...
July 18, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28735885/surface-hydrodynamics-of-viscoelastic-fluids-and-soft-solids-surfing-bulk-rheology-on-capillary-and-rayleigh-waves
#17
REVIEW
Francisco Monroy
From the recent advent of the new soft-micro technologies, the hydrodynamic theory of surface modes propagating on viscoelastic bodies has reinvigorated this field of technology with interesting predictions and new possible applications, so recovering its scientific interest very limited at birth to the academic scope. Today, a myriad of soft small objects, deformable meso- and micro-structures, and macroscopically viscoelastic bodies fabricated from colloids and polymers are already available in the materials catalogue...
July 18, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28802479/emulsion-templated-vesicles-with-symmetric-or-asymmetric-membranes
#18
REVIEW
Yuting Huang, Shin-Hyun Kim, Laura R Arriaga
Emulsion droplets with well-controlled topologies are used as templates for forming vesicles with either symmetric or asymmetric membranes. This review summarizes the available technology to produce these templates, the strategies and critical parameters involved in the transformation of emulsion droplets into vesicles, and the properties of the generated vesicles, with a special focus on the composition and material distribution of the vesicle membrane. Here, we also address limitations in the field and point to future fundamental and applied research in the area...
July 17, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28754381/toward-the-development-of-biomimetic-injectable-and-macroporous-biohydrogels-for-regenerative-medicine
#19
REVIEW
Killian Flégeau, Richard Pace, Hélène Gautier, Gildas Rethore, Jerome Guicheux, Catherine Le Visage, Pierre Weiss
No abstract text is available yet for this article.
July 16, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28751064/structure-interfacial-film-properties-and-thermal-fluctuations-of-microemulsions-as-seen-by-scattering-experiments
#20
REVIEW
Julian Oberdisse, Thomas Hellweg
The physics of microemulsions and in particular Dominique Langevin's contributions to the understanding of microemulsion structure and bending properties using scattering techniques are reviewed. Among the many methods used by her and her co-workers, we particularly emphasize optical techniques and small angle neutron scattering (SANS), but also neutron spin echo spectroscopy (NSE). The review is then extended to more recent studies of properties of microemulsions close to surfaces, using reflectometry and grazing-incidence small angle neutron scattering (GISANS)...
July 16, 2017: Advances in Colloid and Interface Science
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