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Advances in Colloid and Interface Science

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https://www.readbyqxmd.com/read/28716186/formation-of-protein-surfactant-adsorption-layer-as-studied-by-dilational-surface-rheology
#1
REVIEW
Boris A Noskov, Michael M Krycki
The review discusses the mechanism of formation of protein/surfactant adsorption layers at the liquid - gas interface. The complexes of globular proteins usually preserve their compact structure a low surfactant concentrations. Therefore a simple kinetic model of the adsorption of charged compact nanoparticles is discussed first and compared with experimental data. The increase of surfactant concentrations results in various conformational transitions in the surface layer. One can obtain information on the changes of the adsorption layer structure using the dilational surface rheology...
July 6, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28728667/a-comparison-between-liquid-drops-and-solid-particles-in-partial-wetting
#2
REVIEW
Antonio Stocco, Maurizio Nobili
In this critical review we compare two geometries in partial wetting: a liquid drop on a planar substrate and a spherical particle at a planar liquid interface. We show that this comparison is far from being trivial even if the same physical interactions are at play in both geometries. Similarities and differences in terms of free energies and frictions will be discussed. Contact angle hysteresis, the impact of surface roughness and line pinning on wetting will be described and compared to selected experimental findings...
July 1, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28716187/impact-of-albumin-based-approaches-in-nanomedicine-imaging-targeting-and-drug-delivery
#3
REVIEW
Bharat Bhushan, Vitaly Khanadeev, Boris Khlebtsov, Nikolai Khlebtsov, P Gopinath
A major challenge in the field of nanomedicine is to transform laboratory innovations into commercially successful clinical products. In this campaign, a variety of nanoenabled approaches have been designed and investigated for their role in biomedical applications. The advantages associated with the unique structure of albumin imparts it with the ability to interact with variety of molecules, while the functional groups present on their surface provide base for large number of modifications making it as an ideal nanocarrier system...
July 1, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28688780/relationship-between-processing-history-and-functionality-recovery-after-rehydration-of-dried-cellulose-based-suspensions-a-critical-review
#4
REVIEW
Isabelle Déléris, Joël Wallecan
Cellulose-based suspensions have raised more and more attention due to their broad range of properties that can be used in paper industry and material science but also in medicine, nanotechnology and food science. Their final functionality is largely dependent on their processing history and notably the structural modifications that occur during drying and rehydration. The purpose of this work is to make a state-of-the-art contribution to the mechanisms involved in the process-structure-function relationships of cellulose-based hydrogels...
June 30, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28683861/micro-and-nanobubble-technologies-as-a-new-horizon-for-water-treatment-techniques-a-review
#5
REVIEW
Tatek Temesgen, Thi Thuy Bui, Mooyoung Han, Tschung-Il Kim, Hyunju Park
This review article organizes the studies conducted on the areas of microbubbles and nanobubbles with a special emphasis on water treatment. The basic definitions of bubble types and their size ranges are also presented based on the explanations of different researchers. The characterization parameters with state-of-the-art measuring and analysis techniques of microbubble and nanobubble technologies are summarized. Some major applications of these technologies in water-treatment processes are reviewed and briefly discussed...
June 27, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28668171/emerging-nanotechnology-based-strategies-for-diagnosis-and-therapeutics-of-urinary-tract-infections-a-review
#6
REVIEW
M S Kumar, A P Das
At present, various diagnostic and therapeutic approaches are available for urinary tract infections. But, still the quest for development of more rapid, accurate and reliable approach is an unending process. The pathogens, especially uropathogens are adapting to new environments and antibiotics day by day rapidly. Therefore, urinary tract infections are evolving as hectic and difficult to eradicate, increasing the economic burden to the society. The technological advances should be able to compete the adaptability characteristics of microorganisms to combat their growth in new environments and thereby preventing their infections...
June 26, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28662766/electrokinetic-transport-in-liquid-foams
#7
REVIEW
Oriane Bonhomme, Baptiste Blanc, Laurent Joly, Christophe Ybert, Anne-Laure Biance
Investigating electrokinetic transport in a liquid foam is at the confluence of two well developed research areas. On one hand, the study of electrokinetic flows (i.e. surface-driven flows generated close to a charged interface) is fairly well understood in regards the solid/liquid interface. On the other hand, the flow of liquid in a 3D deformable network, i.e a foam, under a volume force such as gravity has been thoroughly studied over the past decade. The overlapping zone of these two frameworks is of great interest for both communities as it gives rise to challenging new questions such as: what is the importance of the nature of the charged interface, created by mobile and soluble surfactants in the case of foam, on electrokinetic transport? How does a foam behave when submitted to a surface-driven flow? Can we compensate a volume-driven flow, i...
June 17, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28647040/synthesis-of-some-transition-metal-m-25mn-27co-28ni-29cu-30zn-47ag-48cd-sulfide-nanostructures-by-hydrothermal-method
#8
REVIEW
Hamid Emadi, Masoud Salavati-Niasari, Azam Sobhani
The design of nanostructures with favored shape, particle size and structure is one of the most important fields of nanoscience. To reach this target hydrothermal method is one of the most applicable methods which allow us to obtain favored structures by changing some parameters. This review focuses on synthesis of some transition metal sulfides by hydrothermal method because of technological importance of this group of material. The common sulfides of Mn, Co, Ni, Cu, Zn, Ag and Cd are introduced and a mechanism proposed for their synthesis...
June 16, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28641814/an-interferometric-technique-to-study-capillary-waves
#9
REVIEW
Laura Cantu', Antonio Raudino, Mario Corti
We describe a new interferometric technique to study gas-liquid and liquid-liquid interfaces. Bubbles and drops are subjected to an alternating electric field which excites capillary oscillations at the interface, if charged. Bubble or drop deformation is detected by the change of the internal optical path of a laser beam crossing perpendicular to the oscillation axis. Due to the closed geometry, a discrete spectrum of stationary oscillation frequencies (normal modes) is excited. The interferometric nature of the measurement and the resonant nature of the oscillation modes concur in allowing for high sensitivity, in the sub-nanometric region...
June 15, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28641813/sensors-and-bioassays-powered-by-upconverting-materials
#10
REVIEW
Diego Mendez-Gonzalez, Enrique Lopez-Cabarcos, Jorge Rubio-Retama, Marco Laurenti
In recent years, considerable efforts have been done to better understand the peculiar emission properties of upconverting materials due to their widespread applications in different and important technological fields such as upconversion-based photoactivated cancer therapies, photoactivated drug-delivery, magnetic resonance imaging contrast agents, bioimaging. However, one of the most promising applications of upconverting materials concerns the field of sensing, due to their unique emission properties. In fact, the minimal autofluorescence, blinking, photo-bleaching, and high photostability makes them an excellent alternative to organic dyes or quantum dots...
June 10, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28641812/continuum-based-models-and-concepts-for-the-transport-of-nanoparticles-in-saturated-porous-media-a-state-of-the-science-review
#11
REVIEW
Peyman Babakhani, Jonathan Bridge, Ruey-An Doong, Tanapon Phenrat
Environmental applications of nanoparticles (NP) increasingly result in widespread NP distribution within porous media where they are subject to various concurrent transport mechanisms including irreversible deposition, attachment/detachment (equilibrium or kinetic), agglomeration, physical straining, site-blocking, ripening, and size exclusion. Fundamental research in NP transport is typically conducted at small scale, and theoretical mechanistic modeling of particle transport in porous media faces challenges when considering the simultaneous effects of transport mechanisms...
June 7, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28606715/the-interaction-of-antimicrobial-peptides-with-membranes
#12
REVIEW
Oksana G Travkova, Helmuth Moehwald, Gerald Brezesinski
The interaction of antimicrobial peptides (AMPs) with biological membranes is in the focus of research since several years, and the most important features and modes of action of AMPs are described in this review. Different model systems can be used to understand such interactions on a molecular level. As a special example, we use 2D and 3D model membranes to investigate the interaction of the natural cyclic (Ar-1) and the synthetic linear molecule arenicin with selected amphiphiles and phospholipids. A panoply of sophisticated methods has been used to analyze these interactions on a molecular level...
June 5, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28619381/recent-experimental-advances-for-understanding-bubble-particle-attachment-in-flotation
#13
REVIEW
Yaowen Xing, Xiahui Gui, Lei Pan, Bat-El Pinchasik, Yijun Cao, Jiongtian Liu, Michael Kappl, Hans-Jürgen Butt
Bubble-particle interaction is of great theoretical and practical importance in flotation. Significant progress has been achieved over the past years and the process of bubble-particle collision is reasonably well understood. This, however, is not the case for bubble-particle attachment leading to three-phase contact line formation due to the difficulty in both theoretical analysis and experimental verification. For attachment, surface forces play a major role. They control the thinning and rupture of the liquid film between the bubble and the particle...
May 31, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28602208/liposomes-and-lipid-bilayers-in-biosensors
#14
REVIEW
Federico Mazur, Marta Bally, Brigitte Städler, Rona Chandrawati
Biosensors for the rapid, specific, and sensitive detection of analytes play a vital role in healthcare, drug discovery, food safety, and environmental monitoring. Although a number of sensing concepts and devices have been developed, many longstanding challenges to obtain inexpensive, easy-to-use, and reliable sensor platforms remain largely unmet. Nanomaterials offer exciting possibilities for enhancing the assay sensitivity and for lowering the detection limits down to single-molecule resolution. In this review, we present an overview of liposomes and lipid bilayers in biosensing applications...
May 31, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28577754/a-review-on-the-mechanical-and-thermodynamic-robustness-of-superhydrophobic-surfaces
#15
REVIEW
Liam R J Scarratt, Ullrich Steiner, Chiara Neto
Advancements in the fabrication and study of superhydrophobic surfaces have been significant over the past 10years, and some 20years after the discovery of the lotus effect, the study of special wettability surfaces can be considered mainstream. While the fabrication of superhydrophobic surfaces is well advanced and the physical properties of superhydrophobic surfaces well-understood, the robustness of these surfaces, both in terms of mechanical and thermodynamic properties, are only recently getting attention in the literature...
May 30, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28625561/monitoring-the-different-micelle-species-and-the-slow-kinetics-of-tetraethylammonium-perfluorooctane-sulfonate-by-19-f-nmr-spectroscopy
#16
LETTER
Xiaolin Wang, Jingfei Chen, Dong Wang, Shuli Dong, Jingcheng Hao, Heinz Hoffmann
Since we lack effective tools that can monitor the structures of surfactant micelles in situ, the different equilibrium species and the slow kinetics of micelles are still not well understood. Herein, by using (19)F NMR, we simultaneously monitored that micelles of tetraethylammonium perfluorooctanesulfonate (TPFOS, C8F17SO3N(C2H5)4) in water grow more complex in virtue of hydrophobic counterions and the slow kinetic exchange process exists in the system. Apart from the monomeric signals, three sets of micelle signals which correspond to spherical micelles, wormlike/wormlike micelles with rings in end caps and toroidal micelles were successfully detected on the NMR time scale because of the slow exchange rate for surfactant molecules between the monomer and the micelle states...
May 26, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28552423/electro-optic-kerr-effect-in-the-study-of-mixtures-of-oppositely-charged-colloids-the-case-of-polymer-surfactant-mixtures-in-aqueous-solutions
#17
REVIEW
Hernán A Ritacco
In this review I highlight a very sensitive experimental technique for the study of polymer-surfactant complexation: The electro-optic Kerr effect. This review does not intend to be exhaustive in covering the Kerr Effect nor polymer-surfactant systems, instead it aims to call attention to an experimental technique that, even if applied in a qualitative manner, could give very rich and unique information about the structures and aggregation processes occurring in mixtures of oppositely charged colloids. The usefulness of electric birefringence experiments in the study of such systems is illustrated by selected results from literature in hope of stimulating the realization of more birefringence experiments on similar systems...
May 15, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28688779/formulation-stabilisation-and-encapsulation-of-bacteriophage-for-phage-therapy
#18
REVIEW
Danish J Malik, Ilya J Sokolov, Gurinder K Vinner, Francesco Mancuso, Salvatore Cinquerrui, Goran T Vladisavljevic, Martha R J Clokie, Natalie J Garton, Andrew G F Stapley, Anna Kirpichnikova
Against a backdrop of global antibiotic resistance and increasing awareness of the importance of the human microbiota, there has been resurgent interest in the potential use of bacteriophages for therapeutic purposes, known as phage therapy. A number of phage therapy phase I and II clinical trials have concluded, and shown phages don't present significant adverse safety concerns. These clinical trials used simple phage suspensions without any formulation and phage stability was of secondary concern. Phages have a limited stability in solution, and undergo a significant drop in phage titre during processing and storage which is unacceptable if phages are to become regulated pharmaceuticals, where stable dosage and well defined pharmacokinetics and pharmacodynamics are de rigueur...
May 14, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28535903/foams-from-nature-to-industry
#19
REVIEW
Christopher Hill, Julian Eastoe
This article discusses different natural and man-made foams, with particular emphasis on the different modes of formation and stability. Natural foams, such as those produced on the sea or by numerous creatures for nests, are generally stabilised by dissolved organic carbon (DOC) molecules or proteins. In addition to this, foam nests are stabilised by multifunctional mixtures of surfactants and proteins called ranaspumins, which act together to give the required physical and biochemical stability. With regards to industrial foams, the article focuses on how various features of foams are exploited for different industrial applications...
May 12, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28528626/colloid-particle-formulations-for-antimicrobial-applications
#20
REVIEW
Ahmed F Halbus, Tommy S Horozov, Vesselin N Paunov
Colloidal particles are being extensively studied in various antimicrobial applications due to their small size to volume ratio and ability to exhibit a wide spectrum of antibacterial, antifungal, antialgal and antiviral action. The present review focuses on various nanoparticles (NPs) of inorganic, organic and hybrid materials, and discusses some of the methods for their preparation as well as mechanisms of their antimicrobial action. We consider the antimicrobial applications of metal oxide nanoparticles (ZnO, MgO, CuO, Cu2O, Al2O3, TiO2, CeO2 and Y2O3), metal nanoparticles (NPs), such as copper, silver and gold, metal hydroxide NPs such as Mg(OH)2 as well as hybrid NPs made from biodegradable materials, such as chitosan, lignin and dextran, loaded with other antimicrobial agents...
May 12, 2017: Advances in Colloid and Interface Science
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