Active matter alters the growth dynamics of coffee rings

Andac, Tugba; Weigmann, Pascal; Velu, Sabareesh K. P.; Pinçe, Erçağ; Volpe, Giorgio; Volpe, Giovanni; Callegari, Agnese

doi:10.1039/c8sm01350k

Cited by 42 publications

(38 citation statements)

References 52 publications

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“…Li et al used solvents with dendrimers and obtained annular structures of a periodic thickness [26]. Callegari et al studied the influence of active matter (moving bacteria) on the dynamics of the coffee-rings growth [27]. A series of papers is dedicated to the formation of nanoparticle chains along the contact line of micron-size droplets [28][29][30].…”

Section: Figmentioning

confidence: 99%

“…These models are usually based on Monte Carlo or molecular dynamics methods [33,41,[43][44][45][46][47]. Some Monte Carlo based models are lattice models [48][49][50], and some are not [27,51,52]. The flow velocity is often calculated analytically for simple particular cases [45,[49][50][51][52][53].…”

Section: Figmentioning

confidence: 99%

“…The obtained velocity field is taken into account for calculations of the particles dynamics. Callegari et al [27] use a constant velocity value. Mobile bacteria are modeled by the Monte Carlo method [27].…”

Section: Figmentioning

confidence: 99%

“…Callegari et al [27] use a constant velocity value. Mobile bacteria are modeled by the Monte Carlo method [27]. Lebedev-Stepanov and Vlasov took account of the adhesion of particles and roughness of the substrate [45].…”

Section: Figmentioning

confidence: 99%

“…Effects of this kind are studied experimentally in [17,18,[22][23][24][25][26][27][28][29][30]. Marín et al primarily explained the mechanism of these effects by convective transfer and dif- * konstantin.kolegov@asu.edu.ru…”

Section: Introductionmentioning

confidence: 99%

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Joint effect of advection, diffusion, and capillary attraction on the spatial structure of particle depositions from evaporating droplets

Kolegov

Barash

2019

Phys. Rev. E

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A simplified model is developed, which allows us to perform computer simulations of the particles transport in an evaporating droplet with a contact line pinned to a hydrophilic substrate. The model accounts for advection in the droplet, diffusion and particle attraction by capillary forces. On the basis of the simulations, we analyze the physical mechanisms of forming of individual chains of particles inside the annular sediment. The parameters chosen correspond to the experiments of Park and Moon [Langmuir 22, 3506 (2006)], where an annular deposition and snakelike chains of colloid particles have been identified. The annular sediment is formed by advection and diffusion transport. We find that the close packing of the particles in the sediment is possible if the evaporation time exceeds the characteristic time of diffusion-based ordering. We show that the chains are formed by the end of the evaporation process due to capillary attraction of particles in the region bounded by a fixing radius, where the local droplet height is comparable to the particle size. At the beginning of the evaporation, the annular deposition is shown to expand faster than the fixing radius moves. However, by the end of the process, the fixing radius rapidly outreaches the expanding inner front of the ring. The snakelike chains are formed at this final stage when the fixing radius moves toward the symmetry axis. arXiv:1903.06003v2 [cond-mat.soft]

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Section: Figmentioning

confidence: 99%

Section: Figmentioning

confidence: 99%

Section: Figmentioning

confidence: 99%

Section: Figmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Joint effect of advection, diffusion, and capillary attraction on the spatial structure of particle depositions from evaporating droplets

Kolegov

Barash

2019

Phys. Rev. E

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Emergence of Ring‐Shaped Microstructures in Restricted Geometries Containing Self‐Propelled, Catalytic Janus Spheres

et al. 2021

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The evaporation of liquid droplets containing colloids is an omnipresent natural phenomenon that has received much attention due to the fundamental effects it entails, as well as the multitudes of fields in which it can be applied. The deposition of particulates onto a solid surface during evaporation tends to form ring-like stains, which are a hallmark of the "coffee-ring effect." A wide variety of systems has already been employed to suppress or enable this effect, however, little attention has been focused on particles in restricted geometries that are driven far from equilibrium. Here, we investigate how self-propelled, "active" catalytic Janus microspheres affect the ring stains left behind during the drying of a geometrically confined suspension containing such particles. Self-propulsion results indirectly from the decomposition of hydrogen peroxide (H 2 O 2 ) on the catalytically active hemispherical shell, while the diametrically opposite face is inert; this is how the system is driven out of equilibrium. The magnitude of activity can be controlled by adjusting the volume concentration of aqueous H 2 O 2 within the suspension. This parameter strongly influences the ringshaped microstructures obtained, especially when the concentration is sufficiently high to produce oxygen bubbles that take over the motion as opposed to auto-phoresis.

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Matrix Producing Cells Induce the Morphological Difference in the Bacillus subtilis Biofilm

Kong

Wang

et al. 2023

Indian J Microbiol

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Active matter alters the growth dynamics of coffee rings

Cited by 42 publications

References 52 publications

Joint effect of advection, diffusion, and capillary attraction on the spatial structure of particle depositions from evaporating droplets

Joint effect of advection, diffusion, and capillary attraction on the spatial structure of particle depositions from evaporating droplets

Emergence of Ring‐Shaped Microstructures in Restricted Geometries Containing Self‐Propelled, Catalytic Janus Spheres

Matrix Producing Cells Induce the Morphological Difference in the Bacillus subtilis Biofilm

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