Temperature- and pH-Dependent Shattering: Insoluble Fatty Ammonium Phosphate Films at Water–Oil Interfaces

Forth, Joe; French, David; Gromov, Andrey; King, Stephen M.; Titmuss, Simon; Lord, Kathryn M.; Ridout, Michael J.; Wilde, Peter J.; Clegg, Paul S.

doi:10.1021/acs.langmuir.5b01981

Cited by 21 publications

(36 citation statements)

References 72 publications

(135 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the case of liquid–fluid interfaces and interfaces wetted by reversibly adsorbed components, Γ ij = 0 and the surface stress is exactly equal to the liquid–fluid surface tension as measured using pendant drop or Wilhelmy plate. In the presence of material that is quasi‐irreversibly bound to the liquid–liquid interface Γ ij becomes significant, and gives rise to the complex shapes observed in Pickering emulsions, liquid capsules, bijels, and, most recently, printed and molded liquids …”

Section: Quantitative Descriptions Of Complex Interfacesmentioning

confidence: 99%

Building Reconfigurable Devices Using Complex Liquid–Fluid Interfaces

et al. 2019

Self Cite

View full text Add to dashboard Cite

imparts novel mechanical and functional properties to the macroscopic interface itself. These properties include size-and charge-selective pathways for molecules and particulates, shear and compressive moduli, and selective binding and reaction sites. Complex interfaces can then be used to generate complex, macroscopic, all-liquid materials with very high surface areas that have unique properties, such as compartmentalization, communication between compartments, and the ability to move and reconfigure. With the rapid growth in the study of complex materials made from interfacially structured liquids, there is a need to review the field from the funda-Liquid-fluid interfaces provide a platform both for structuring liquids into complex shapes and assembling dimensionally confined, functional nanomaterials. Historically, attention in this area has focused on simple emulsions and foams, in which surface-active materials such as surfactants or colloids stabilize structures against coalescence and alter the mechanical properties of the interface. In recent decades, however, a growing body of work has begun to demonstrate the full potential of the assembly of nanomaterials at liquid-fluid interfaces to generate functionally advanced, biomimetic systems. Here, a broad overview is given, from fundamentals to applications, of the use of liquid-fluid interfaces to generate complex, all-liquid devices with a myriad of potential applications. Figure 2.Interactions between particles attached to liquid-fluid interfaces. a) Dipole-dipole interactions between adsorbed particles due to asymmetric charge distributions near the surface of particles at interfaces. Reproduced with permission. [34] Copyright 1980, American Physical Society. b) Dipole-dipole interactions give rise to 2D colloidal crystals with large lattice spacings. Scale bar, 50 µm. Reproduced with permission. [36]

show abstract

Section: Quantitative Descriptions Of Complex Interfacesmentioning

confidence: 99%

Building Reconfigurable Devices Using Complex Liquid–Fluid Interfaces

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…Forth et al, for example, studied the development of interfacial elasticity by tracking the drop shape of constant volume and calculating the discrepancy between the predicted shape by the Young−Laplace equation and the measured drop shape. 41 In the current study, the more conventional oscillatory pendant drop method was used to quantify the interfacial dilatational elasticity. The pulsating droplet module (PD 200) of the Theta Optical Tensiometer T200 was used to measure dilatational viscoelastic complex modulus (E) and hence the dilatational elastic modulus (E ) of the NPAM-stabilized oil−water interface.…”

Section: Dilatational Rheologymentioning

confidence: 99%

Dynamic Interactions between a Silica Sphere and Deformable Interfaces in Organic Solvents Studied by Atomic Force Microscopy

et al. 2016

View full text Add to dashboard Cite

Recent studies have successfully measured surface forces using 8 atomic force microscope (AFM) and modeled surface deformations using the Stokes−Reynolds−Young−Laplace (SRYL) equations for particle−droplet, particle−bubble, droplet−droplet, and bubble−bubble systems in various solutions. The current work focuses on interactions between spherical silica particles and a viscoelastic interface of water droplets in crude oil. The self-assembly of surface active natural polyaromatic molecules (NPAMs) at the oil−water interface has previously been shown to change a viscous dominant oil−water interface to an elastic dominant interface upon aging, due to gradual formation of rigid interfacial networks. AFM was used to measure the interactions between a small silica sphere (D ≈ 8 m) and a deformable water droplet (D ≈ 70 m), which exhibits time-dependent interfacial viscoelasticity in NPAM solutions. Unlike the systems studied previously, the measured deformation shown as a repulsive force over the region of constant compliance could not be modeled adequately by the conventional SRYL equations which are applicable only to purely Laplacian interfaces. As the water droplet ages in NPAM solutions, a rigid "skin" forms at the oil−water interface, with the interface exhibiting increased elasticity. Over a short aging period (up to 15 min in NPAM-in-toluene solution), interfacial deformation is well predicted by the SRYL model. However, upon further exposure to the NPAM solution, droplet deformation is over predicted by the model. Physical properties of this mechanical barrier as a function of interfacial aging were further investigated by measuring interfacial tension, dilatational rheology, and interfacial "crumpling" (non-smooth, non-Laplacian interface) upon droplet volume reduction. By introducing a viscoelasticity parameter to account for interfacial stiffening and using experimentally determined elasticity, we are able to correct this discrepancy and predict droplet deformation under AFM cantilever compression. This parameter appears to be important for modeling non-Laplacian systems of significant viscoelastic contributions, such as biological cell membranes or polymer blends.

show abstract

“…Liquid-liquid interfaces play an important role in physical, chemical and biological sciences as they break inversion symmetry and promote the interfacial self-assembly of monolayers of surfactants, colloids and nanoparticles to reduce the interfacial energy [1]. Consequently, the interface can be effectively functionalized by the segregation of molecular surfactants [2,3], polyelectrolytes [4,5], biomaterials [6], liquid crystals [7,8] and micro/nanoparticles [1,9], to the interface endowing the interface with the inherent characteristics and functionalities of these materials. Provided the binding energy of the particles to the interface is sufficiently high, immiscible liquid phases can be emulsified and stabilized against coalescence, affording compartmentalization that enables mass or ion transport for drug delivery, or fluidic reactors [10,11].…”

Section: Introductionmentioning

confidence: 99%

Perspective: Ferromagnetic Liquids

Streubel

Liu

et al. 2020

Materials

View full text Add to dashboard Cite

Mechanical jamming of nanoparticles at liquid–liquid interfaces has evolved into a versatile approach to structure liquids with solid-state properties. Ferromagnetic liquids obtain their physical and magnetic properties, including a remanent magnetization that distinguishes them from ferrofluids, from the jamming of magnetic nanoparticles assembled at the interface between two distinct liquids to minimize surface tension. This perspective provides an overview of recent progress and discusses future directions, challenges and potential applications of jamming magnetic nanoparticles with regard to 3D nano-magnetism. We address the formation and characterization of curved magnetic geometries, and spin frustration between dipole-coupled nanostructures, and advance our understanding of particle jamming at liquid–liquid interfaces.

show abstract

Temperature- and pH-Dependent Shattering: Insoluble Fatty Ammonium Phosphate Films at Water–Oil Interfaces

Cited by 21 publications

References 72 publications

Building Reconfigurable Devices Using Complex Liquid–Fluid Interfaces

Building Reconfigurable Devices Using Complex Liquid–Fluid Interfaces

Dynamic Interactions between a Silica Sphere and Deformable Interfaces in Organic Solvents Studied by Atomic Force Microscopy

Perspective: Ferromagnetic Liquids

Contact Info

Product

Resources

About