Shell formation in short like-charged polyelectrolytes in a harmonic trap

Dutta, Sandipan; Jho, YongSeok

doi:10.1103/physreve.93.012503

Cited by 2 publications

(2 citation statements)

References 53 publications

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“…Some effort to combine part of these properties are still on going. For example, the liquid state theory of polymer is introduced to capture the charge release [95] or the strong coupling effect [96].…”

Section: -C Theoretical Consideration Of the Interfacial Tension Of Coacervate Fluidsmentioning

confidence: 99%

Molecular and structural basis of low interfacial energy of complex coacervates in water

Jho

Yoo

Lin

et al. 2017

Advances in Colloid and Interface Science

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Complex coacervate refers to a phase-separated fluid, typically of two oppositely charged polyelectrolytes in solution, representing a complex fluid system that has been shown to be of essential interest to biological systems, as well as for soft materials processing owing to the expectation of superior underwater coating or adhesion properties. The significance and interest in complex coacervate fluids critically rely on its low interfacial tension with respect to water that, in turn, facilitates the wetting of macromolecular or material surfaces under aqueous conditions, provided there is attractive interaction between the polyelectrolyte constituents and the surface. However, the molecular and structural bases of these properties remain unclear. Recent studies propose that the formation of water-filled and bifluidic sponge-like nanostructured network, driven by the tuning of electrostatic interactions between the polyelectrolyte constituents or their complexes may be a common feature of complex coacervate fluids that display low fluid viscosity and low interfacial tension, but more studies are needed to verify the generality of these observations. In this review, we summarize representative studies of interfacial tension and ultrastructures of complex coacervate fluids. We highlight that a consensus property of the complex coacervate fluid is the observation of high or even bulk-like water dynamics within the dense complex coacervate phase that is consistent with a low cohesive energy fluid. Our own studies on this subject are enabled by the application of magnetic resonance relaxometry methods relying on spin labels tethered to polyelectrolyte constituents or added as spin labeled probe molecules that partition into the dense versus the equilibrium coacervate phase, permitting the extraction of information on local polymer dynamics, polymer packing and local water dynamics. We conclude with a snapshot of our current perspective on the molecular and structural bases of the low interfacial tension of complex coacervate fluids.

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Section: -C Theoretical Consideration Of the Interfacial Tension Of Coacervate Fluidsmentioning

confidence: 99%

Molecular and structural basis of low interfacial energy of complex coacervates in water

Jho

Yoo

Lin

et al. 2017

Advances in Colloid and Interface Science

View full text Add to dashboard Cite

show abstract

“…In that work the correlation energy, based on local density approximation (LDA), and with this the excess chemical potential was calculated. In anther study [44] the density profile of a polyelectrolyte system in a harmonic trap was calculated. A similar shell structure formation was observed.…”

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confidence: 99%

Strongly coupled Yukawa plasma layer in a harmonic trap

Pan,

Kalman,

Hartmann

2021

Preprint

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Observations made in dusty plasma experiments suggest that an ensemble of electrically charged solid particles, confined in an elongated trap, develops structural inhomogeneities. With narrowing the trap the particles tend to form layers oriented parallel with the trap walls. In this work we present theoretical and numerical results on the structure of three-dimensional many-particle systems with screened Coulomb (Yukawa) inter-particle interaction in the strongly coupled liquid phase, confined in one-dimensional harmonic trap, forming quasi-2D configurations. Particle density profiles are calculated by means of the hypernetted chain approximation (HNC), showing clear signs of layer formation. The mechanism behind the formation of layer structure is discussed and a method to predict the number of layers is presented. Molecular dynamics (MD) simulations provide validation of the theoretical results and detailed microscopic insights.

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Shell formation in short like-charged polyelectrolytes in a harmonic trap

Cited by 2 publications

References 53 publications

Molecular and structural basis of low interfacial energy of complex coacervates in water

Molecular and structural basis of low interfacial energy of complex coacervates in water

Strongly coupled Yukawa plasma layer in a harmonic trap

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