Interfacial Particle Dynamics: One and Two Step Yielding in Colloidal Glass

Zhang, Huagui; Yu, Kai; Cayre, Olivier J.; Harbottle, David

doi:10.1021/acs.langmuir.6b03586

Cited by 49 publications

(51 citation statements)

References 56 publications

(168 reference statements)

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“…32 The yielding behavior of silica nanoparticles attached at air/water interfaces has been also studied by large-amplitude oscillation rheology very recently. 48 In this work, varying both surfactant and particle concentration, the soft-glassy dynamics is also confirmed.…”

Section: Introductionsupporting

confidence: 68%

Nonaffine deformation and tunable yielding of colloidal assemblies at the air–water interface

Maestro

Zaccone

2017

Nanoscale

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Silica nanoparticles trapped at the air-water interface form a 2D solid state with amorphous order. We propose a theoretical model to describe how this solid-like state deforms under a shear strain ramp up to and beyond a yielding point which leads to plastic flow. The model accounts for all the particle-level and many-body physics of the system: nonaffine displacements, local connectivity and its evolution in terms of cage-breaking, and interparticle interactions mediated by the particle chemistry and colloidal forces. The model is able to reproduce experimental data with only two non-trivial fitting parameters: the relaxation time of the cage and the viscous relaxation time. The interparticle spring constant contains information about the strength of interparticle bonding which is tuned by the amount of surfactant that renders the particles hydrophobic and mutually attractive. This framework opens up the possibility of quantitatively tuning and rationally designing the mechanical response of colloidal assemblies at the air-water interface. Also, it provides a mechanistic explanation for the observed non-monotonic dependence of yield strain on surfactant concentration.

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Section: Introductionsupporting

confidence: 68%

Nonaffine deformation and tunable yielding of colloidal assemblies at the air–water interface

Maestro

Zaccone

2017

Nanoscale

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“…This frequency‐dependence in the solid‐like films was interpreted in terms of the soft glassy rheology (SGR) model of Sollich et al, with more in‐depth modelling performed in follow‐on work . Zhang et al also studied a silica‐NP‐based system to study the response of particle monolayers to both large‐ and small‐amplitude oscillatory shear, also finding a soft, glassy response to the applied shear …”

Section: Quantitative Descriptions Of Complex Interfacesmentioning

confidence: 96%

Building Reconfigurable Devices Using Complex Liquid–Fluid Interfaces

et al. 2019

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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]

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“…[18] Similar to the particle aggregation kinetics observed in the bulk, particle aggregation at the liquid-liquid interface follows the diffusion-limited (DLCA), or reaction-limited cluster aggregation (RLCA) kinetics to form low density or high density gel-like networks, respectively. [10,19] For strongly hydrophobic particles, well ordered, crystalline structures have been observed when deposited at a liquid-liquid interface, [20] with the long-range Coulomb interaction dominating the particle-particle repulsion.…”

Section: Introductionmentioning

confidence: 99%

“…[23] The critical particle concentration for network jamming is dependent on the attractive potential, with strong attraction between particles leading to the formation of a space-spanning, contiguous particle assembly of increased shear viscosity at significantly lower particle surface coverages ( ~ 40%). [10,19] The liquid-like to solid-like boundary has been shown to strongly correlate to the decreased probability of droplet coalescence. [23] In a solid-like state, mobility of the particle assembly can only be achieved once the particle assembly is ruptured after the sustained stress exceeds the interfacial shear yield stress of the particle-laden interface.…”

Section: Introductionmentioning

confidence: 99%

“…As particles partition more strongly at the air-water interface the contribution from G' emerges and a strongly elastic interface eventually formed with long-range attraction attributed to hydrophobic and capillary forces. [29] As a function of particle concentration and strength of particle-particle contact, Zhang et al [19] highlighted both one-step and two-step yielding mechanisms for particle-laden interfaces. Beyond the fluid-solid transition, weakly aggregated particle networks exhibited one-step yielding with two-step yielding observed with increasing elasticity of the particle-laden film.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The rheology of polyvinylpyrrolidone-coated silica nanoparticles positioned at an air-aqueous interface

Zhang

Biggs

et al. 2018

Journal of Colloid and Interface Science

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Particle-stabilized emulsions and foams are widely encountered, as such there remains a concerted effort to better understand the relationship between the particle network structure surrounding droplets and bubbles, and the rheology of the particle-stabilized interface. Poly(vinylpyrrolidone)-coated silica nanoparticles were used to stabilize foams. The shear rheology of planar particle-laden interfaces were measured using an interfacial shear rheometer and the rheological properties measured as a function of the sub-phase electrolyte concentration and surface pressure. All particle-laden interfaces exhibited a liquid-like to solid-like transition with increasing surface pressure. The surface pressure-dependent interfacial rheology was then correlated to the formed micron-scale structures of the particle-laden interfaces which were imaged using a Brewster angle microscope. With the baseline knowledge established, foams were prepared using the same composite particles and the particle network structure imaged using cryo-SEM. An attempt has been made to correlate the two structures observed at a planar interface and that surrounding a bubble to elucidate the likely rheology of the bubble stabilizing particle network. Independent of the sub-phase electrolyte concentration, the resulting rheology of the bubble stabilizing particle network was strongly elastic and appeared to be in a compression state at the region of the L-S phase transition.

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Interfacial Particle Dynamics: One and Two Step Yielding in Colloidal Glass

Cited by 49 publications

References 56 publications

Nonaffine deformation and tunable yielding of colloidal assemblies at the air–water interface

Nonaffine deformation and tunable yielding of colloidal assemblies at the air–water interface

Building Reconfigurable Devices Using Complex Liquid–Fluid Interfaces

The rheology of polyvinylpyrrolidone-coated silica nanoparticles positioned at an air-aqueous interface

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