Spreading dynamics on lithium niobate: An example of an intrinsically charged ferroelectric surface

Vinikumar, Sushmitha; Schönecker, Clarissa

doi:10.1016/j.colsurfa.2023.131792

Cited by 2 publications

(1 citation statement)

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“…Electric charge is transferred when water comes into contact with a solid or liquid surface. − The surface charge state depends on both the surface and liquid compositions − and is known to control the liquid spreading dynamics . Hydrophobic surfaces, for example fluoropolymers, usually acquire a net negative charge, such that a corresponding net positive charge remains in the liquid. − The detailed origin of this charge transfer is not well understood, but investigations have suggested that hydroxide ions , or alignment of the water molecules and topological defects in the hydrogen bonding structure near the interface are likely to play major roles.…”

Section: Introductionmentioning

confidence: 99%

Charge Transfer Quenching and Maximum of a Liquid–Air Contact Line Moving over a Hydrophobic Surface

Helseth

2024

Langmuir

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Charge transfer when a hydrophobic fluoropolymer surface comes in contact with salt solutions of water, methanol, and glycerol is investigated. It is found that the charge transfer decreases faster with an increasing fraction of glycerol in water than it does with methanol in water. It is also demonstrated that for both mixtures, the charge transfer increases with the amount of added sodium chloride for small concentrations but then reaches a maximum and subsequently decreases. Surprisingly, this maximum charge transfer shifts toward higher salt concentrations with increasing amount of glycerol in water. However, in water−methanol mixtures, one does not observe a similar shift in charge transfer maximum toward higher salt concentrations. These observations are explained using a model, taking into account the decreased shear distance from the hydrophobic surface for which ions are removed from the electrical double layer due to an interplay of forces acting on the ions.

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Section: Introductionmentioning

confidence: 99%

Charge Transfer Quenching and Maximum of a Liquid–Air Contact Line Moving over a Hydrophobic Surface

Helseth

2024

Langmuir

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Evaporation Dynamics on a Lithium Niobate Surface

Vinikumar,

Schönecker

2024

ChemPhysChem

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Manipulating water evaporation dynamics is a prerequisite in various modern‐day applications like DNA stretching, rapid disease diagnostics, and inkjet printing. One method to affect the evaporation dynamics of droplets is to externally apply electric fields. However, surfaces that bear an intrinsic surface charge have not yet been investigated with respect to their evaporation behavior. In this study, we investigate water droplet evaporation on lithium niobate (LN), a ferroelectric material with a very high spontaneous polarization of 0.7 C/m2. Our results show that a droplet deposited on a LN surface evaporates in three stages: (i) constant contact radius (ii) mixed phase (iii) stick‐slip, which is likely originating from the intrinsic surface charge. The influences of the polarization direction of the LN surface as well as the relative humidity of the environment on various evaporation characteristics were studied. The results suggest that the specific adsorption layers forming on charged surfaces, e.g. from the humidity of the surrounding air, play a key role in the evaporation process. Furthermore, compared to other materials with similar contact angles, LN demonstrated a significantly large evaporation rate. This property might also be attributed to the intrinsic surface charge and could be exploited in heat transfer applications.

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Spreading dynamics on lithium niobate: An example of an intrinsically charged ferroelectric surface

Cited by 2 publications

References 70 publications

Charge Transfer Quenching and Maximum of a Liquid–Air Contact Line Moving over a Hydrophobic Surface

Charge Transfer Quenching and Maximum of a Liquid–Air Contact Line Moving over a Hydrophobic Surface

Evaporation Dynamics on a Lithium Niobate Surface

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