Liquid flow reversibly creates a macroscopic surface charge gradient

Ober, Patrick; Boon, W. Q.; Dijkstra, Marjolein; Backus, Ellen H. G.; Roij, René van; Bonn, Mischa

doi:10.1038/s41467-021-24270-x

Cited by 27 publications

(65 citation statements)

References 44 publications

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“…It is found that the second-force equilibrium equation [33] has been proved by the experiments. A few inferences derived from the second-force equilibrium equation are consistent with the experimental results [34,35]. After finding the verification experiments of the second-force equilibrium equation, we have more confidence in the second-precession equilibrium equation.…”

Section: Introductionsupporting

confidence: 79%

One underlying mechanism for two piezoelectric effects in the octonion spaces

Weng

2022

Eur. Phys. J. Plus

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The paper aims to apply the algebra of octonions to explore the contributions of external derivative of electric moments and so forth on the induced electric currents, revealing a few major influencing factors relevant to the direct and inverse piezoelectric effects. J. C. Maxwell was the first to adopt the algebra of quaternions to describe the physical quantities of electromagnetic fields. The contemporary scholars utilize the quaternions and octonions to research the physical properties of electromagnetic and gravitational fields. The application of octonions is able to study the physical quantities of electromagnetic and gravitational fields, including the octonion field strength, field source, linear moment, angular moment, torque and force. When the octonion force is equal to zero, it is capable of achieving eight independent equations, including the force equilibrium equation, fluid continuity equation, current continuity equation, and second-precession equilibrium equation and others. One of inferences derived from the second-precession equilibrium equation is that the electric current and derivative of electric moments are able to excite each other. The external derivative of electric moments can induce the electric currents. Meanwhile the external electric currents are capable of inducing the derivative of electric moments. The research states that this inference can be considered as the underlying mechanism for the direct and inverse piezoelectric effects. Further the second-precession equilibrium equation is able to predict several new influencing factors of direct and inverse piezoelectric effects.

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Section: Introductionsupporting

confidence: 79%

One underlying mechanism for two piezoelectric effects in the octonion spaces

Weng

2022

Eur. Phys. J. Plus

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“…Interfacial charge dynamics is ultimately determined by physicochemical processes, such as dissociation of charged functional groups or specific adsorption of ions (12)(13)(14)(15), which occur in the few layers of molecules at the interface between the solid surface and the solvent. While new insights have been obtained thanks to electrokinetic measurements (16,17), second harmonic generation (18)(19)(20), dynamic atomic force microscopy (21), or time-resolved fluorescence (22,23), our fundamental understanding of the dynamics of these interfacial processes remains poor (24,25) because of the difficulties in obtaining surface-specific information at both high spatial and temporal resolution. In this context, we could recently resolve the diffusive dynamics of individual excess proton charge at the interface between defected hexagonal boron nitride (hBN) and aqueous solutions (26).…”

Section: Introductionmentioning

confidence: 99%

Anomalous interfacial dynamics of single proton charges in binary aqueous solutions

et al. 2021

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Our understanding of the dynamics of charge transfer between solid surfaces and liquid electrolytes has been hampered by the difficulties in obtaining interface, charge, and solvent-specific information at both high spatial and temporal resolution. Here, we measure at the single charge scale the dynamics of protons at the interface between an hBN crystal and binary mixtures of water and organic amphiphilic solvents (alcohols and acetone), evidencing a marked influence of solvation on interfacial dynamics. Applying single-molecule localization microscopy to emissive crystal defects, we observe correlated activation between adjacent ionizable surface defects, mediated by the transport of single excess protons along the solid/liquid interface. Solvent content has a nontrivial effect on interfacial dynamics, leading at intermediate water fraction to an increased surface diffusivity, as well as an increased affinity of the proton charges to the solid surface. Our measurements evidence the notable role of solvation on interfacial proton charge transport.

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“…For instance, in atomic force microscopy experiments on silica with tip speeds as fast as 0.5 μm=s, charge regulation due to the EDL overlap between the surface and tip is so fast that no hysteresis is observed in force-distance curves [5]. This suggests that surface chemistry adapts within milliseconds-a value consistent with flow experiments on mineral surfaces probing the electronic response induced by composition changes [6][7][8]. Dissolution experiments also provide lower bounds for protolysis rates.…”

mentioning

confidence: 64%

Surface Protolysis and Its Kinetics Impact the Electrical Double Layer

et al. 2022

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Surface conductivity in the electrical double layer (EDL) is known to be affected by proton hopping and diffusion at solid-liquid interfaces. Yet, the role of surface protolysis and its kinetics on the thermodynamic and transport properties of the EDL are usually ignored as physical models consider static surfaces. Here, using a novel molecular dynamics method mimicking surface protolysis, we unveil the impact of such chemical events on the system's response. Protolysis is found to strongly affect the EDL and electrokinetic aspects with major changes in ζ potential and electro-osmotic flow.

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Liquid flow reversibly creates a macroscopic surface charge gradient

Cited by 27 publications

References 44 publications

One underlying mechanism for two piezoelectric effects in the octonion spaces

One underlying mechanism for two piezoelectric effects in the octonion spaces

Anomalous interfacial dynamics of single proton charges in binary aqueous solutions

Surface Protolysis and Its Kinetics Impact the Electrical Double Layer

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