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Book ; Online: Current Perspective on the Study of Liquid-Fluid Interfaces: From Fundamentals to Innovative Applications

Guzmán, Eduardo / Guzmán, Eduardo

2022

Keywords	Technology: general issues ; thermal radiations ; magnetic field ; Carreau fluid ; stretching/shrinking surface ; Hall effect ; nonlinear radiations ; HAM ; desulfurization wastewater evaporation technology ; evaporation performance ; orthogonal test ; simulation ; spray coating ; coating film formation ; leveling of coating surface ; fluorescence method ; visualization ; ferromagnetic ; nanofluid ; bioconvection ; porous medium ; heat suction/injection ; magnetic dipole ; liquid-infused surfaces ; durability ; lubricants ; wetting ; liquid-repellent coatings ; annealed Co40Fe40W20 thin films ; magnetic tunnel junctions (MTJs) ; X-ray diffraction (XRD) ; contact angle ; surface energy ; nanomechanical properties ; Prandtl nanofluid flow ; convectively heated surface ; stochastic intelligent technique ; Levenberg Marquardt method ; backpropagated network ; artificial neural network ; Adam numerical solver ; surface hydrophilicity ; graphene ; ice formation ; clearance ; molecular dynamic simulation ; dynamics ; fluid interfaces ; inhalation ; lung surfactant ; nanoparticles ; pollutants ; rheology ; emulsion ; droplet size ; microscopy-assisted ; image analysis ; laser diffraction ; turbidity ; viscosity ; Ree-Eyring nanofluid ; viscous dissipation ; Cattaneo-Christov model ; Koo-Kleinstreuer model ; chemical reaction ; heat transfer ; stretching cylinder ; nonlinear radiation ; Powell-Eyring ; Darcy-Forchheimer ; n/a
Language	0\|e
Size	1 electronic resource (222 pages)
Publisher	MDPI - Multidisciplinary Digital Publishing Institute
Publishing place	Basel
Document type	Book ; Online
Note	English ; Open Access
HBZ-ID	HT021613614
ISBN	9783036547244 ; 303654724X
Database	ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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Book ; Online: Fluid Interfaces

Guzmán, Eduardo / Guzmán, Eduardo

2021

Keywords	Technology: general issues ; polyelectrolyte ; surfactants ; kinetically trapped aggregates ; interfaces ; surface tension ; interfacial dilational rheology ; adsorption ; nonlinear stretching sheet ; viscoelastic fluid ; MHD ; viscous dissipation ; underwater vehicle ; sea-water pump ; vibration isolation ; flexible pipes ; cationic surfactants ; Gemini 12-2-12 surfactant ; dynamic surface tension ; maximum bubble pressure ; surface potential ; nanofluid ; stretching surface ; rotating fluid ; Homotopy Analysis Method (HAM) ; porous media ; magnetohydrodynamics ; hybrid nanofluid ; stretching cylinder ; flow characteristics ; nanoparticles ; convective heat transfer ; interfacial tensions ; dilational rheology ; biocompatible emulsions ; partition coefficient ; Tween 80 ; saponin ; citronellol glucoside ; MCT oil ; Miglyol 812N ; lipids ; pollutants ; Langmuir monolayers ; particles ; rheology ; neutron reflectometry ; ellipsometry ; DPPC ; lipid monolayers ; air/water interface ; entropy ; second grade nanofluid ; Cattaneo-Christov heat flux model ; nonlinear thermal radiation ; Joule heating ; fluid displacement ; inverse Saffman-Taylor instability ; partially miscible ; Korteweg force ; gyrotactic microorganisms ; micropolar magnetohydrodynamics (MHD) ; Maxwell nanofluid ; single wall carbon nanotubes (SWCNTs) and multi wall carbon nanotubes (MWCNTs) ; thermal radiation ; chemical reaction ; mixed convection ; permeability ; confinement ; dynamics ; materials ; applications
Size	1 electronic resource (232 pages)
Publisher	MDPI - Multidisciplinary Digital Publishing Institute
Publishing place	Basel, Switzerland
Document type	Book ; Online
Note	English ; Open Access
HBZ-ID	HT021044342
ISBN	9783039436347 ; 3039436341
Database	ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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Article ; Online: Soft Colloidal Particles at Fluid Interfaces.

Guzmán, Eduardo / Maestro, Armando

Polymers

2022 Volume 14, Issue 6

Abstract: The assembly of soft colloidal particles at fluid interfaces is reviewed in the present paper, with emphasis on the particular case of microgels formed by cross-linked polymer networks. The dual polymer/colloid character as well as the stimulus ... ...

Abstract	The assembly of soft colloidal particles at fluid interfaces is reviewed in the present paper, with emphasis on the particular case of microgels formed by cross-linked polymer networks. The dual polymer/colloid character as well as the stimulus responsiveness of microgel particles pose a challenge in their experimental characterization and theoretical description when adsorbed to fluid interfaces. This has led to a controversial and, in some cases, contradictory picture that cannot be rationalized by considering microgels as simple colloids. Therefore, it is necessary to take into consideration the microgel polymer/colloid duality for a physically reliable description of the behavior of the microgel-laden interface. In fact, different aspects related to the above-mentioned duality control the organization of microgels at the fluid interface, and the properties and responsiveness of the obtained microgel-laden interfaces. This works present a critical revision of different physicochemical aspects involving the behavior of individual microgels confined at fluid interfaces, as well as the collective behaviors emerging in dense microgel assemblies.
Language	English
Publishing date	2022-03-11
Publishing country	Switzerland
Document type	Journal Article ; Review
ZDB-ID	2527146-5
ISSN	2073-4360 ; 2073-4360
ISSN (online)	2073-4360
ISSN	2073-4360
DOI	10.3390/polym14061133
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Anomalous Concentration Dependence of Surface Tension and Concentration-Concentration Correlation Functions of Binary Non-Electrolyte Solutions.

Carbone, Carlo / Guzmán, Eduardo / Rubio, Ramón G

International journal of molecular sciences

2023 Volume 24, Issue 3

Abstract: The concentration dependence of the surface tension of several binary mixtures of non-electrolytes has been measured at 298.15 K. The mixtures have been chosen since they presented a so-called "W-shape" concentration dependence of the excess constant ... ...

Abstract	The concentration dependence of the surface tension of several binary mixtures of non-electrolytes has been measured at 298.15 K. The mixtures have been chosen since they presented a so-called "W-shape" concentration dependence of the excess constant pressure heat capacity and high values of the concentration-concentration correlation function. This behavior was interpreted in terms of the existence of anomalously high concentration fluctuations that resemble those existing in the proximities of critical points. However, no liquid-liquid phase separation has been found in any of these mixtures over a wide temperature range. In this work, we have extended these studies to the liquid-air interfacial properties. The results show that the concentration dependence of the surface tension shows a plateau and the mixing surface tension presents a "W-shape" behavior. To the best of our knowledge, this is the first time that this behavior is reported. The weak anomalies of the surface tension near a liquid-liquid critical point suggest that the results obtained cannot be considered far-from-critical effects. The usual approach of substituting the activity by the concentration in the Gibbs equation for the relative surface concentration has been found to lead to large errors and the mixtures to have a fuzzy and thick liquid/vapor interface.
MeSH term(s)	Surface Tension ; Hot Temperature
Language	English
Publishing date	2023-01-23
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2019364-6
ISSN	1422-0067 ; 1422-0067 ; 1661-6596
ISSN (online)	1422-0067
ISSN	1422-0067 ; 1661-6596
DOI	10.3390/ijms24032276
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Layer-by-Layer Nanoassemblies for Vaccination Purposes.

Guzmán, Eduardo / Ortega, Francisco / Rubio, Ramón G

Pharmaceutics

2023 Volume 15, Issue 5

Abstract: In recent years, the availability of effective vaccines has become a public health challenge due to the proliferation of different pandemic outbreaks which are a risk for the world population health. Therefore, the manufacturing of new formulations ... ...

Abstract	In recent years, the availability of effective vaccines has become a public health challenge due to the proliferation of different pandemic outbreaks which are a risk for the world population health. Therefore, the manufacturing of new formulations providing a robust immune response against specific diseases is of paramount importance. This can be partially faced by introducing vaccination systems based on nanostructured materials, and in particular, nanoassemblies obtained by the Layer-by-Layer (LbL) method. This has emerged, in recent years, as a very promising alternative for the design and optimization of effective vaccination platforms. In particular, the versatility and modularity of the LbL method provide very powerful tools for fabricating functional materials, opening new avenues on the design of different biomedical tools, including very specific vaccination platforms. Moreover, the possibility to control the shape, size, and chemical composition of the supramolecular nanoassemblies obtained by the LbL method offers new opportunities for manufacturing materials which can be administered following specific routes and present very specific targeting. Thus, it will be possible to increase the patient convenience and the efficacy of the vaccination programs. This review presents a general overview on the state of the art of the fabrication of vaccination platforms based on LbL materials, trying to highlight some important advantages offered by these systems.
Language	English
Publishing date	2023-05-10
Publishing country	Switzerland
Document type	Journal Article ; Review
ZDB-ID	2527217-2
ISSN	1999-4923
ISSN	1999-4923
DOI	10.3390/pharmaceutics15051449
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Association of oppositely charged polyelectrolyte and surfactant in solution: equilibrium and nonequilibrium features.

Guzmán, Eduardo / Maestro, Armando / Ortega, Francisco / Rubio, Ramón G

Journal of physics. Condensed matter : an Institute of Physics journal

2023 Volume 35, Issue 32

Abstract: The association of polyelectrolytes and surfactants bearing charges of opposite signs has been for long time considered under an equilibrium framework. However, this is far to provide a true description of the physico-chemical rules of the association ... ...

Abstract	The association of polyelectrolytes and surfactants bearing charges of opposite signs has been for long time considered under an equilibrium framework. However, this is far to provide a true description of the physico-chemical rules of the association process when kinetically arrested nonequilibrium states are formed. This is the result of specific interaction pathways between the polyelectrolyte chains and the surfactant molecules determined by the mixing procedure and the mixture composition. In fact, the specific characteristics of the method used for the mixture can induce local inhomogeneities in the mixture composition which can govern the properties of the obtained supramolecular aggregates, driving to the systems to a situation far from the true equilibrium. This topical review tries to provide to the reader a general perspective of the role of the nonequilibrium aspects in the control of the polyelectrolyte-surfactant association process, and how these impact on the obtained supramolecular nanoassemblies, and their properties.
Language	English
Publishing date	2023-05-16
Publishing country	England
Document type	Journal Article ; Review
ZDB-ID	1472968-4
ISSN	1361-648X ; 0953-8984
ISSN (online)	1361-648X
ISSN	0953-8984
DOI	10.1088/1361-648X/acd041
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Anomalous Colloidal Motion under Strong Confinement.

Abelenda-Núñez, Irene / Ortega, Francisco / Rubio, Ramón G / Guzmán, Eduardo

Small (Weinheim an der Bergstrasse, Germany)

2023 Volume 19, Issue 36, Page(s) e2302115

Abstract: Diffusion of biological macromolecules in the cytoplasm is a paradigm of colloidal diffusion in an environment characterized by a strong restriction of the accessible volume. This makes of the understanding of the physical rules governing colloidal ... ...

Abstract	Diffusion of biological macromolecules in the cytoplasm is a paradigm of colloidal diffusion in an environment characterized by a strong restriction of the accessible volume. This makes of the understanding of the physical rules governing colloidal diffusion under conditions mimicking the reduction in accessible volume occurring in the cell cytoplasm, a problem of a paramount importance. This work aims to study how the thermal motion of spherical colloidal beads in the inner cavity of giant unilamellar vesicles (GUVs) is modified by strong confinement conditions, and the viscoelastic character of the medium. Using single particle tracking, it is found that both the confinement and the environmental viscoelasticity lead to the emergence of anomalous motion pathways for colloidal microbeads encapsulated in the aqueous inner cavity of GUVs. This anomalous diffusion is strongly dependent on the ratio between the volume of the colloidal particle and that of the GUV under consideration as well as on the viscosity of the particle's liquid environment. Therefore, the results evidence that the reduction of the free volume accessible to colloidal motion pushes the diffusion far from a standard Brownian pathway as a result of the change in the hydrodynamic boundary conditions driving the particle motion.
Language	English
Publishing date	2023-04-28
Publishing country	Germany
Document type	Journal Article
ZDB-ID	2168935-0
ISSN	1613-6829 ; 1613-6810
ISSN (online)	1613-6829
ISSN	1613-6810
DOI	10.1002/smll.202302115
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Forces Controlling the Assembly of Particles at Fluid Interfaces.

Guzmán, Eduardo / Ortega, Francisco / Rubio, Ramón G

Langmuir : the ACS journal of surfaces and colloids

2022 Volume 38, Issue 44, Page(s) 13313–13321

Abstract: The interaction of particles with fluid interfaces is ubiquitous in synthetic and natural work, involving two types of interactions: particle-interface interactions (trapping energy) and interparticle interactions. Therefore, it is urgent to gain a deep ... ...

Abstract	The interaction of particles with fluid interfaces is ubiquitous in synthetic and natural work, involving two types of interactions: particle-interface interactions (trapping energy) and interparticle interactions. Therefore, it is urgent to gain a deep understanding of the main forces controlling the trapping of particles at fluid interfaces, and their assembly to generate a broad range of structures characterized by different degrees of order. This Perspective tries to provide an overview of the main contributions to the energetic landscape controlling the assembly of particles at fluid interfaces, which is essential for exploiting this type of interfacial systems as platforms for the fabrication of interface-based soft materials with technological interest.
Language	English
Publishing date	2022-10-24
Publishing country	United States
Document type	Journal Article ; Review
ZDB-ID	2005937-1
ISSN	1520-5827 ; 0743-7463
ISSN (online)	1520-5827
ISSN	0743-7463
DOI	10.1021/acs.langmuir.2c02038
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Emulsions containing essential oils, their components or volatile semiochemicals as promising tools for insect pest and pathogen management.

Lucia, Alejandro / Guzmán, Eduardo

Advances in colloid and interface science

2020 Volume 287, Page(s) 102330

Abstract: Most of the traditional strategies used for facing the management of insect pest and diseases have started to fail due to different toxicological issues such as the resistance of target organism and the impact on environment and human health. This has ... ...

Abstract	Most of the traditional strategies used for facing the management of insect pest and diseases have started to fail due to different toxicological issues such as the resistance of target organism and the impact on environment and human health. This has made mandatory to seek new effective strategies, which minimize the risks and hazards without compromising the effectiveness of the products. The use of essential oils, their components and semiochemicals (pheromones and allelochemicals) has become a promising safe and eco-sustainable alternative for controlling insect pest and pathogens. However, the practical applications of this type of molecules remain rather limited because their high volatility, poor solubility in water and low chemical stability. Therefore, it is required to design strategies enabling their use without any alteration of their biological and chemical properties. Oil-in-water nano/microemulsions are currently considered as promising tools for taking advantage of the bioactivity of essential oils and their components against insects and other pathogens. Furthermore, these colloidal systems also allows the encapsulation and controlled release of semiochemicals, which enables their use in traps for monitoring, trapping or mating disruption of insects, and in push-pull strategies for their behavioral manipulation. This has been possible because the use of nano/microemulsions allows combining the protection provided by the hydrophobic environment created within the droplets with the enhanced dispersion of the molecules in an aqueous environment, which favors the handling of the bioactive molecules, and limits their degradation, without any detrimental effect over their biological activity. This review analyzes some of the most recent advances on the use of emulsion-like dispersions as a tool for controlling insect pest and pathogens. It is worth noting that even though the current physico-chemical knowledge about these systems is relatively poor, a deeper study of the physico-chemical aspects of nanoemulsions/microemulsions containing essential oils, their components or semiochemicals, may help for developing most effective formulations, enabling the generalization of their use.
MeSH term(s)	Animals ; Emulsions ; Humans ; Insecta ; Oils, Volatile/pharmacology ; Pheromones/pharmacology
Chemical Substances	Emulsions ; Oils, Volatile ; Pheromones
Language	English
Publishing date	2020-11-25
Publishing country	Netherlands
Document type	Journal Article ; Review
ZDB-ID	210507-x
ISSN	1873-3727 ; 0001-8686
ISSN (online)	1873-3727
ISSN	0001-8686
DOI	10.1016/j.cis.2020.102330
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Evaluating the Impact of Hydrophobic Silicon Dioxide in the Interfacial Properties of Lung Surfactant Films.

Guzmán, Eduardo / Santini, Eva / Ferrari, Michele / Liggieri, Libero / Ravera, Francesca

Environmental science & technology

2022 Volume 56, Issue 11, Page(s) 7308–7318

Abstract: The interaction of hydrophobic silicon dioxide particles (fumed silicon dioxide), as model air pollutants, and Langmuir monolayers of a porcine lung surfactant extract has been studied in order to try to shed light on the physicochemical bases underlying ...

Abstract	The interaction of hydrophobic silicon dioxide particles (fumed silicon dioxide), as model air pollutants, and Langmuir monolayers of a porcine lung surfactant extract has been studied in order to try to shed light on the physicochemical bases underlying the potential adverse effects associated with pollutant inhalation. The surface pressure-area isotherms of lung surfactant (LS) films including increasing amounts of particles revealed that particle incorporation into LS monolayers modifies the organization of the molecules at the water/vapor interface, which alters the mechanical resistance of the interfacial films, hindering the ability of LS layers for reducing the surface tension, and reestablishing the interface upon compression. This influences the normal physiological function of LS as is inferred from the analysis of the response of the Langmuir films upon the incorporation of particles against harmonic changes of the interfacial area (successive compression-expansion cycles). These experiments evidenced that particles alter the relaxation mechanisms of LS films, which may be correlated to a modification of the transport of material within the interface and between the interface and the adjacent fluid during the respiratory cycle.
MeSH term(s)	Animals ; Lung ; Pressure ; Pulmonary Surfactants/chemistry ; Pulmonary Surfactants/metabolism ; Silicon Dioxide ; Surface Properties ; Surface Tension ; Surface-Active Agents/metabolism ; Swine
Chemical Substances	Pulmonary Surfactants ; Surface-Active Agents ; Silicon Dioxide (7631-86-9)
Language	English
Publishing date	2022-01-25
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	1520-5851
ISSN (online)	1520-5851
DOI	10.1021/acs.est.1c06885
Database	MEDical Literature Analysis and Retrieval System OnLINE

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