The Effect of Electrokinetic Potential on Evaporation of Colloidal Dispersion Droplets

Molchanov, S. P.; Roldughin, V. I.; Chernova-Kharaeva, I. A.; Senchikhin, I. N.

doi:10.1134/s1061933x19020091

Cited by 3 publications

(3 citation statements)

References 22 publications

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“…Another subgroup of methods is based on forces of particle interaction (figure 1). These include electrostatic and intermolecular interaction forces (Van der Waals forces) [120,121,122,80,123,124]. The capillary particle interaction also needs to be mentioned [125,126,127,128,80,129].…”

Section: Hybrid Methodsmentioning

confidence: 99%

Applying Droplets and Films in Evaporative Lithography

Kolegov,

Barash

2020

Preprint

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The review covers experimental results of evaporative lithography and analyzes existing mathematical models of this method. Evaporating droplets and films are applied in different fields, such as cooling of heated surfaces of electronic devices, diagnostics in health care, creation of transparent conductive coatings on flexible substrates, surface patterning. A method called evaporative lithography emerged after establishing the connection between the coffee ring effect taking place in drying colloidal droplets, and naturally occuring inhomogeneous vapor flow densities from fluid-vapor interfaces. Essential control of the colloidal particle deposit patterns is achieved in this method by producing ambient conditions that induce a nonuniform evaporation profile from the colloidal liquid surface. Evaporative lithography is part of a wider field, which is known as "Evaporative-induced self-assembly" (EISA). EISA involves methods based on the contact line processes, methods employing particle interaction effects and evaporative lithography. As a rule, evaporative lithography is a flexible and single-stage process with such advantages as simplicity, low price and possibility of application to almost any substrate without pretreatment. Since no mechanical impact on a template is present in evaporative lithography, the template integrity is preserved in the process. The method is also useful for creating materials with localized functions, such as slipperiness and self-healing. For these reasons, evaporative lithography attracts increasing attention and has a number of noticeable achievements at present. We also analyze limitations of the approach and ways of its further development.

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Section: Hybrid Methodsmentioning

confidence: 99%

Applying Droplets and Films in Evaporative Lithography

Kolegov,

Barash

2020

Preprint

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“…Particle transport in evaporating droplets can also be affected by the particles themselves. Prior studies have varied the particle shape, , type, charge, size, and concentration , and all can play a role in transport and deposition. For example, the particle shape can be used to affect particle transport and deposition by altering how particles arrange themselves on the air–water interface during evaporation; , particle transport can be affected by surface and particle charges that lead to Derjaguin, Landau, Verwey, and Overbeek effects that combine van der Waals’ and electrostatic forces between particles and surfaces; , and particles that are more dense than the liquid they are suspended in are likely to sink to the substrate before being carried to the contact line by advection. ,, The present study focuses on particle concentration and size.…”

Section: Introductionmentioning

confidence: 99%

“…Prior studies have varied the particle shape, , type, charge, size, and concentration , and all can play a role in transport and deposition. For example, the particle shape can be used to affect particle transport and deposition by altering how particles arrange themselves on the air–water interface during evaporation; , particle transport can be affected by surface and particle charges that lead to Derjaguin, Landau, Verwey, and Overbeek effects that combine van der Waals’ and electrostatic forces between particles and surfaces; , and particles that are more dense than the liquid they are suspended in are likely to sink to the substrate before being carried to the contact line by advection. ,, The present study focuses on particle concentration and size. Increased particle concentration has been shown to increase contact line pinning, which can delay or prevent the transition from the CCD evaporative mode to the CCA mode. ,,, Many studies have also shown that smaller particles (<1 μm) are more likely to increase the pinning force at the contact line. ,, This also delays the transition from the CCD to CCA modes.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Particle Transport and Deposition Due to Heterogeneous Dewetting on Low-Cost Inkjet-Printed Devices

Li,

Maki,

Schertzer

2023

Langmuir

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This work investigates the deposition patterns left by evaporating particle-laden droplets on heterogeneous surfaces with spatially varying wettability. Spatial differences in receding contact angles give rise to scalloped-shaped contact lines. During evaporation, the contact line recedes in one location and remains pinned in another. This nonuniform contact line recession results in particle self-assembly above areas where the contact line remains pinned but not where it recedes. This behavior is fairly robust across a variety of particle sizes, concentrations, and device geometries. We hypothesize that particle self-assembly in these cases is due to the competition between particle diffusion and evaporative-driven advective flow. Diffusion appears to be more pronounced in regions where the contact line recedes, while advection appears to be more pronounced near the pinned portion of the contact line. As such, particles appear to diffuse away from receding areas and toward pinned areas, where advection transports them to the contact line. The distribution of particle deposition above the pinned regions was influenced by the particle size and the concentration of particles in the droplet. Similar to homogeneous surfaces, deposition was more prevalent at the pinned portion of the contact line for smaller particles and lower concentrations and more uniformly distributed across the entire pinned region for larger particles and higher concentrations. A better understanding of this process may be beneficial in a wide variety of particle separation applications, such as printing, cell patterning, biosensing, and anti-icing.

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Applying droplets and films in evaporative lithography

Kolegov

Barash

2020

Advances in Colloid and Interface Science

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The Effect of Electrokinetic Potential on Evaporation of Colloidal Dispersion Droplets

Cited by 3 publications

References 22 publications

Applying Droplets and Films in Evaporative Lithography

Applying Droplets and Films in Evaporative Lithography

Characterization of Particle Transport and Deposition Due to Heterogeneous Dewetting on Low-Cost Inkjet-Printed Devices

Applying droplets and films in evaporative lithography

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