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Surface phase transitions in foams and emulsions
Publication date: Available online 2 October 2019Source: Current Opinion in Colloid & Interface ScienceAuthor(s): Nikolai Denkov, Slavka Tcholakova, Diana CholakovaAbstractSurface phase transitions in surfactant adsorption layers are known to affect the dynamic properties of foams and to induce surface nucleation in freezing emulsion drops. Recently, these transitions were found to play a role in several other phenomena, opening new opportunities for controlling foam and emulsion properties. This review presents a brief outlook of the emerging opportunities in this area. Three topics are emphasized: (1) The use of surfacta...
Source: Current Opinion in Colloid and Interface Science - October 2, 2019 Category: Chemistry Source Type: research

Coalescence in foams and emulsions: similarities and differences
Publication date: Available online 28 September 2019Source: Current Opinion in Colloid & Interface ScienceAuthor(s): Dominique LangevinAbstractCoalescence in emulsions and foams is far from being understood, despite of many years of investigations. The phenomenon is not easy to characterize because it is extremely rapid and coupled to several others, gravity effects, leading to vertical motion of drops/bubbles and ripening, leading to their growth. Coalescence implies the rupture of films between drops/bubbles and involves contributions from hydrodynamics, surface rheology, surface forces and thermal fluctuations. Differen...
Source: Current Opinion in Colloid and Interface Science - September 30, 2019 Category: Chemistry Source Type: research

Recent advances in studies of bubble-solid interactions and wetting film stability
Publication date: Available online 28 September 2019Source: Current Opinion in Colloid & Interface ScienceAuthor(s): Marta Krasowska, Kazimierz Malysa, David A. BeattieAbstractResearch in the area of bubble-solid interactions is reviewed and highlighted, with a focus on studies of wetting film drainage using theoretical approaches and experimental (interferometric) approaches, and also studies probing the stability of wetting films, where the stability has been affected by physical and chemical modification/factors. Significant advances have been made in recent years in the area of interferometry and force measurement of b...
Source: Current Opinion in Colloid and Interface Science - September 30, 2019 Category: Chemistry Source Type: research

Structural characterization of protein–polymer conjugates for biomedical applications with small-angle scattering
Publication date: August 2019Source: Current Opinion in Colloid & Interface Science, Volume 42Author(s): Jonathan K. Pokorski, Michael J.A. HoreAbstractProtein–polymer conjugates, typically consisting of one or more polymers covalently attached to a protein, are an increasingly common component in biotechnology. Polymers can increase circulation time, alter immune responses, and influence the self-assembly of proteins to which they are attached. To understand and take full advantage of the benefits that protein–polymer conjugates provide, there is a strong need for structural characterization of both the conjugates and...
Source: Current Opinion in Colloid and Interface Science - September 29, 2019 Category: Chemistry Source Type: research

Editorial overview X-Ray and Neutron Scattering Recent applications of x-ray and neutron scattering techniques in colloid and interfacial science, characterised by increasing diversity and complexity
Publication date: Available online 31 August 2019Source: Current Opinion in Colloid & Interface ScienceAuthor(s): Jeff Penfold, Norman J. Wagner (Source: Current Opinion in Colloid and Interface Science)
Source: Current Opinion in Colloid and Interface Science - September 26, 2019 Category: Chemistry Source Type: research

Lipid and surfactant self-assembly: significance of NMR in developing our understanding
Publication date: Available online 10 September 2019Source: Current Opinion in Colloid & Interface ScienceAuthor(s): Maura Monduzzi, Björn LindmanAbstractThis review, devoted to the memory of Kåre Larsson, deals with surfactant and lipid self-assembly. The focus is on the crucial role of NMR techniques in the understanding, at a molecular level, molecular dynamics and microstructure. The strength of NMR self-diffusion in determining size and shape of supramolecular aggregates as well as microstructural features, in terms of water-in-oil, oil-in-water and bicontinuity, is emphasized.Graphical abstract (Source: Current Opi...
Source: Current Opinion in Colloid and Interface Science - September 11, 2019 Category: Chemistry Source Type: research

Invited REVIEW for Current Opinion in Colloid & Interface Science for Memorial volume in honour of: Prof. Helmut Möhwald Interfacial Nanoarchitectonics for Molecular Manipulation and Molecular Machine Operation
Publication date: Available online 10 September 2019Source: Current Opinion in Colloid & Interface ScienceAuthor(s): Katsuhiko Ariga, Masaki Ishii, Taizo MoriAbstractThe nanoarchitectonics concept enables us to produce functional systems and materials from nano-scale units through nanotechnological approaches together with the processes including chemical syntheses, atom/molecule manipulations, self-assemblies, self-organizations, field-induced material regulations, and bio-related processes. Especially, manipulations of molecules (molecular machines) and sophisticated organization would be attractive targets in interfacia...
Source: Current Opinion in Colloid and Interface Science - September 10, 2019 Category: Chemistry Source Type: research

Recent Advances in Short Peptide Self-assembly: from Rational Design to Novel Applications
Publication date: Available online 3 September 2019Source: Current Opinion in Colloid & Interface ScienceAuthor(s): Xuzhi Hu, Mingrui Liao, Haoning Gong, Lin Zhang, Henry Cox, Thomas A. Waigh, Jian R. LuAbstractDue to their structural simplicity and robust self-assembled nanostructures, short peptides prove to be an ideal system to explore the physical processes of self-assembly, hydrogels, semi-flexible polymers, quenched disorder and reptation. Rational design in peptide sequences facilitates cost-effective manufacturing, but the huge number of possible peptides has imposed obstacles for their characterisation to establi...
Source: Current Opinion in Colloid and Interface Science - September 4, 2019 Category: Chemistry Source Type: research

Poiseuille and extensional flow small-angle scattering for developing structure–rheology relationships in soft matter systems
Publication date: August 2019Source: Current Opinion in Colloid & Interface Science, Volume 42Author(s): Avanish Bharati, Steven D. Hudson, Katie M. WeigandtAbstractAs the rheoscattering community has grown, so has the breadth of experiments both in terms of materials systems, and also in terms of flow types and analysis approaches. In this review, we seek to highlight important recent developments in rheoscattering that go beyond simple shear measurements. In particular, this review will focus on Poiseuille flow and extensional flow small-angle scattering and results from recent experiments that lead to the development of...
Source: Current Opinion in Colloid and Interface Science - September 1, 2019 Category: Chemistry Source Type: research

Recent applications of x-ray and neutron scattering techniques in colloid and interfacial science, characterised by increasing diversity and complexity
Publication date: Available online 31 August 2019Source: Current Opinion in Colloid & Interface ScienceAuthor(s): Jeff Penfold, Norman Wagner (Source: Current Opinion in Colloid and Interface Science)
Source: Current Opinion in Colloid and Interface Science - September 1, 2019 Category: Chemistry Source Type: research

Structural Characterization of Protein-Polymer Conjugates for Biomedical Applications with Small-Angle Scattering
Publication date: Available online 19 August 2019Source: Current Opinion in Colloid & Interface ScienceAuthor(s): Jonathan K. Pokorski, Michael J.A. HoreAbstractProtein-polymer conjugates, typically consisting of one or more polymers covalently attached to a protein, are an increasingly common component in biotechnology. Polymers can increase circulation time, alter immune responses, and influence the self-assembly of proteins to which they are attached. To understand and take full advantage of the benefits that protein-polymer conjugates provide, there is a strong need for structural characterization of both the conjugate...
Source: Current Opinion in Colloid and Interface Science - August 20, 2019 Category: Chemistry Source Type: research

Poiseuille and Extensional FlowSAS for Developing Structure-Rheology Relationships in Soft Matter Systems
Publication date: Available online 8 August 2019Source: Current Opinion in Colloid & Interface ScienceAuthor(s): Avanish Bharati, Steven D. Hudson, Katie M. WeigandtAbstractAs the rheoscattering community has grown, so have the breadth of experiments both in terms of materials systems, and also in terms of flow types and analysis approaches. In this review, we seek to highlight important recent developments in rheoscattering that go beyond simple shear measurements. In particular this review will focus on Poiseuille flow and extensional flow small angle scattering and results from recent experiments that lead to the develo...
Source: Current Opinion in Colloid and Interface Science - August 10, 2019 Category: Chemistry Source Type: research

Short-time dynamics of proteins in solutions studied by neutron spin echo
Publication date: Available online 6 August 2019Source: Current Opinion in Colloid & Interface ScienceAuthor(s): Yun LiuAbstractDynamics of proteins in solutions include translational, rotational, and internal motions that are linked to different protein properties. Because most proteins are small with the sizes just a few nanometers, the time scale for its short time dynamics usually range from a few nanoseconds to a few hundreds of nanoseconds, during which a protein usually does not rotate too much. Protein short-time dynamics have been shown to be useful to study liquid theories, protein cluster formation, gelation tra...
Source: Current Opinion in Colloid and Interface Science - August 7, 2019 Category: Chemistry Source Type: research

Rheology of particulate rafts, films, and foams
Publication date: October 2019Source: Current Opinion in Colloid & Interface Science, Volume 43Author(s): Olivier Pitois, Florence RouyerAbstractLiquid foam exhibits remarkable rheological behavior although it is made with simple fluids: it behaves similar to a solid at low shear stress but flows similar to a liquid above a critical shear stress. Such properties, which have been proved to be useful for many applications, are even enhanced by adding solid particles. Depending on their hydrophobicity and size, the particles can have different geometrical configurations at the mesoscopic scale, that is, at the air–liquid in...
Source: Current Opinion in Colloid and Interface Science - July 16, 2019 Category: Chemistry Source Type: research

Dielectric RheoSANS: a mutual electrical and rheological characterization technique using small-angle neutron scattering
Publication date: August 2019Source: Current Opinion in Colloid & Interface Science, Volume 42Author(s): Jeffrey J. Richards, John K. RileyAbstractDielectric RheoSANS is a new measurement technique that combines in situ electrical, mechanical, and scattering capabilities to probe the structure and dynamics of soft materials at equilibrium and under flow. This review summarizes the technique and presents data from model systems including conductive polymers, colloidal suspensions, and viscoelastic surfactant solutions. Finally, we identify several areas within soft matter that have historically combined dielectric, rheologi...
Source: Current Opinion in Colloid and Interface Science - June 13, 2019 Category: Chemistry Source Type: research