Marangoni circulation in evaporating droplets in the presence of soluble surfactants

Gaalen, R.T. van; Diddens, Christian; Wijshoff, Herman; Kuerten, Johannes G.M.

doi:10.1016/j.jcis.2020.10.057

Cited by 43 publications

(23 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[31] The surface tension can become non-uniform due to thermal effects from the heat substrate, causing a shear stress that drives Marangoni convection within the sessile droplet. [32,33] Under the circumstance of higher deposition temperature, a sharper temperature gradient exists on the surface between the apex and the edge of the drop, which would enhance the Marangoni convection within the droplet. The concentrated accumulation of MXene nanosheets would be attenuated at the droplet periphery and closely stacked MXene nanosheets would not be expected when the solvent fully evaporates, resulting in the increment in interlayer distance during the MXene crumpled nanosphere formation (Figure S3, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Crumpled and Eccentric Nanospheres of Ti₃C₂T_x MXene by Aerosol Jet Printing on Heat Substrate

Lin

Zhang³

et al. 2022

Adv Eng Mater

View full text Add to dashboard Cite

2D MXene has attracted tremendous attention for developing high‐performance energy storage devices regarding its good metallicity and relatively large accessible surface area. However, the electrochemical performance of MXene‐related devices was hindered due to the pronounced self‐stacking characteristic of MXene. Herein, a convenient aerosol jet printing (AJP) process is developed for the synthesis of MXene nanospheres with crumpled and eccentric structures by modulating the migration and assembly of MXene nanosheets on heat substrate. The existing temperature gradient between the apex and the edge of the deposited droplet causes thermocapillary flows carrying MXene nanosheets toward the edge and the MXene nanosheets are further shaped and assembled along the droplet surface during the solvent evaporation. Interdigital microelectrodes of crumpled MXene nanospheres are tentatively developed for electrochemical performance characterization, a competitive areal capacitance performance is demonstrated in comparison with other MXene‐based devices. Importantly, this work highlights the great potential of the AJP technique for developing functional devices with fascinating hierarchical features as well as further extending applications in miniaturized and intelligent microelectronics.

show abstract

Section: Resultsmentioning

confidence: 99%

Crumpled and Eccentric Nanospheres of Ti₃C₂T_x MXene by Aerosol Jet Printing on Heat Substrate

Lin

Zhang³

et al. 2022

Adv Eng Mater

View full text Add to dashboard Cite

show abstract

“…Here, α e is the evaporation coefficient [41], M is the molar mass, R is the universal gas constant, T sat is the saturation temperature, P sat is the saturated vapor pressure, P v is the partial pressure of the gas in a mixture. Let us write the flow velocity in the subdomain ω as [42,43]…”

Section: Model Equationsmentioning

confidence: 99%

Nonuniform heating of a substrate in evaporative lithography

Al-Muzaiqer,

Kolegov,

Ivanova

et al. 2021

Preprint

View full text Add to dashboard Cite

The work is devoted to the study of one method connected with structured sediments formation, which belongs to the direction of evaporative lithography. A series of experiments were carried out with nonuniform evaporation of an isopropanol film containing polystyrene microspheres that occurred in an open cylindrical cell. The local inhomogeneity of the vapor flux density was achieved due to the temperature gradient. A copper rod was mounted in the central part of the bottom of the cell for further heating. The thermocapillary flow resulting from the surface tension gradient due to the temperature drop transfers the particles that were originally at rest along the bottom of the cell. The effect of the initial thickness of the liquid layer on the height and area of the sediment (cluster) formed in the central region of the cell is experimentally studied. The velocity of the particles was measured using particle image velocimetry. A mathematical model describing the process at the initial stage is developed. The equations of heat transfer and thermal conductivity were used to define the temperature distribution in the liquid and the cell. The fluid flow was simulated by the lubrication approximation. The particle distribution was modeled using the convection-diffusion equation. The evaporation flux density was calculated using the Hertz-Knudsen equation. The dependence of the liquid viscosity on the particle concentration was described by Mooney's formula. Numerical results showed that the liquid film gradually becomes thinner in the central region, as the surface tension decreases with increasing temperature. The liquid flow is directed to the heater near the substrate. It transfers the particles to the center of the cell. The volume fraction of the particles increases over time in this region. The work done allowed us to formulate the conclusion that the heat flow from the heater affects the geometry of the sediment for two reasons. First, the Marangoni flow velocity depends on the temperature gradient. Secondly, the decrease in film thickness near the heater depends on the temperature.

show abstract

“…Notably, alteration of the surface energies can be achieved by using either passive or active techniques as per the target application. 10–32 Passive techniques for manipulating the wetting behaviour of droplets primarily include topology modification, 10–13 a change in the chemical properties of the surface 14–16 or diluting the droplets with surfactants or nanoparticles. 17–19 By contrast, using external stimuli via a number of active manipulation strategies, the wetting behaviour of the sessile droplets can be modified.…”

Section: Introductionmentioning

confidence: 99%

“…10–32 Passive techniques for manipulating the wetting behaviour of droplets primarily include topology modification, 10–13 a change in the chemical properties of the surface 14–16 or diluting the droplets with surfactants or nanoparticles. 17–19 By contrast, using external stimuli via a number of active manipulation strategies, the wetting behaviour of the sessile droplets can be modified. Examples of such manipulation strategies that have been regularly used in DMF platforms are electrical, 23,24,33 magnetic, 8,25–29 optical (optoelectrowetting, optothermal), 20–22,34 thermo-capillarity, 9,30,31 surface acoustics waves (SAW) 32,35 and mechanowetting.…”

Section: Introductionmentioning

confidence: 99%

Magnetowetting dynamics of sessile ferrofluid droplets: a review

2022

View full text Add to dashboard Cite

show abstract

Marangoni circulation in evaporating droplets in the presence of soluble surfactants

Cited by 43 publications

References 66 publications

Crumpled and Eccentric Nanospheres of Ti₃C₂T_x MXene by Aerosol Jet Printing on Heat Substrate

Crumpled and Eccentric Nanospheres of Ti₃C₂T_x MXene by Aerosol Jet Printing on Heat Substrate

Nonuniform heating of a substrate in evaporative lithography

Magnetowetting dynamics of sessile ferrofluid droplets: a review

Contact Info

Product

Resources

About

Marangoni circulation in evaporating droplets in the presence of soluble surfactants

Cited by 43 publications

References 66 publications

Crumpled and Eccentric Nanospheres of Ti3C2Tx MXene by Aerosol Jet Printing on Heat Substrate

Crumpled and Eccentric Nanospheres of Ti3C2Tx MXene by Aerosol Jet Printing on Heat Substrate

Nonuniform heating of a substrate in evaporative lithography

Magnetowetting dynamics of sessile ferrofluid droplets: a review

Contact Info

Product

Resources

About

Crumpled and Eccentric Nanospheres of Ti₃C₂T_x MXene by Aerosol Jet Printing on Heat Substrate

Crumpled and Eccentric Nanospheres of Ti₃C₂T_x MXene by Aerosol Jet Printing on Heat Substrate