Giant Thermoelectric Response of Nanofluidic Systems Driven by Water Excess Enthalpy

Fu, Li; Joly, Laurent; Mérabia, Samy

doi:10.1103/physrevlett.123.138001

Cited by 39 publications

(54 citation statements)

References 84 publications

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“…Thermoelectric coefficient S T .-This coefficient is much more difficult to establish for soapy interfaces. For classical interface, the usual interpretation [48] due to electrostatic force has been recently challenged by MD simulations [49]. If we note this transport coefficient M TE in the vicinity of the interface, due to the foam geometry, it reads as for the other terms:…”

Section: Appendix A: Transport Coefficients In Liquid Foamsmentioning

confidence: 99%

Thermally Enhanced Electro-osmosis to Control Foam Stability

Bonhomme

Biance

2020

Phys. Rev. X

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Liquid foam is a dense dispersion of liquid bubbles in a surfactant solution. Because of its large surface area, it is an out-of-equilibrium material that evolves with space and time because of coarsening, coalescence, and liquid drainage. In many applications, it is required to control the lifetime of a foam by limiting the drainage or triggering the collapse at a specific location or a given time. We show here that applying an external electric field at the edge of the foam induces some liquid flows. Depending on the flow magnitude, it controls either gravity driven drainage, the foam stability, or the foam collapse at a specific location. Thus, applying an electric field to a liquid foam can control its stability. The experimental results are quantitatively described by a simple model taking into account first the electro-osmotic transport in such a deformable medium and second the Marangoni flows induced by heterogeneous heating due to Joule effect. More specifically, we show for the first time that electro-osmosis can be strongly enhanced due to thermal gradients generated by the applied electric field.

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Section: Appendix A: Transport Coefficients In Liquid Foamsmentioning

confidence: 99%

Thermally Enhanced Electro-osmosis to Control Foam Stability

Bonhomme

Biance

2020

Phys. Rev. X

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“…The similar principle can be applied in nanofluidics for energy conversion from thermo‐osmotic flows. [ 299 ] Thus, it is also possible to generate direct ionic flow between two reservoirs in different temperatures connected by an ion‐selective membrane. Based on this, Xie et al.…”

Section: Applicationmentioning

confidence: 99%

Track‐Etched Nanopore/Membrane: From Fundamental to Applications

2020

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Biomimetic and bio‐inspired membranes draw great attention and generate extensive efforts to solve environmental, health, and energy issues. In this field, track‐etched membranes present the advantage to be tuned from a single pore to a large‐scale multipore membrane. On one hand, from the large‐scale membrane to a single nanopore, the research becomes more fundamental, meticulous, and quantitative to describe concrete processes inside confined spaces. This allows understanding the role of the surface phenomena and nanoscale effects. On the other hand, working from a single pore to a multipore membrane allows perfect control of the membrane properties. This ensures a promising ability for upscale from the lab findings to applications. In this review, a global insight on the track‐etched nanopore/membrane is taken through presentation of fabrication and functionalization methods, transport properties, and the related applications. By functionalization, track‐etched nanopores can be used to understand ion transport under confined spaces with high aspect ratio, to analyze single molecules, to design stimuli‐responsive membranes, and to generate energy from salinity gradient and light.

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“…† The surfaces were characterized by contact angles, at 300 K, of θ ∼ 134°f or water-LJ walls, θ ∼ 80°for water-graphene, θ ∼ 100°for MeOH-LJ walls and θ ∼ 0°for MeOH-graphene; these contact angles were obtained through sessile nanodroplet simulations, following a procedure described in ref. 79.…”

Section: Simulationsmentioning

confidence: 99%