Benjamin Gorin
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View article: Active particle in a very thin interfacial droplet
Active particle in a very thin interfacial droplet Open
A single light-driven Janus particle confined in a very thin oil droplet at an air-water interface displays intriguing dynamics. While laser activation induces rapid horizontal motion ( 1 m m / s – 1 c m / s ) by thermal Marangoni fl…
View article: Partial wetting of water on ice
Partial wetting of water on ice Open
Is ice always covered by a thin layer of water? This question has been discussed for over 150 years. Here we show that the apparent contact angle of a droplet of water on ice increases steeply with decreasing ice temperature, from around 1…
View article: Evidence and quantification of memory effects in competitive first-passage events
Evidence and quantification of memory effects in competitive first-passage events Open
Splitting probabilities quantify the likelihood of a given outcome out of competitive events. This key observable of random walk theory, historically introduced as the gambler’s ruin problem, is well understood for memoryless (Markovian) p…
View article: Impacts of poroelastic spheres
Impacts of poroelastic spheres Open
Understanding the physical mechanism governing the impact of soft porous solids on rigid surfaces is at the basis of the development of shock-absorbing materials. Traditionally, the static contact of such soft solids with the substrate is …
View article: Active particle in a very thin interfacial droplet
Active particle in a very thin interfacial droplet Open
A single light-driven Janus particle confined in a very thin oil droplet at an air--water interface displays intriguing dynamics. While laser activation induces rapid horizontal motion (1mm/s--1cm/s) by thermal Marangoni flow, the particle…
View article: Evidence and quantification of memory effects in competitive first passage events
Evidence and quantification of memory effects in competitive first passage events Open
Splitting probabilities quantify the likelihood of a given outcome out of competitive events. This key observable of random walk theory, historically introduced as the gambler's ruin problem, is well understood for memoryless (Markovian) p…
View article: Viscoelastic rheology of polymer solution probed by resonant thermal capillary fluctuation
Viscoelastic rheology of polymer solution probed by resonant thermal capillary fluctuation Open
We present a measurement of viscoelastic properties of polymer solutions using resonant thermal capillary fluctuations of the surface of a polymer solution droplet. The instantaneous deflection of a cantilever in contact with the drop surf…
View article: Activity Induced Rigidity of Liquid Droplets
Activity Induced Rigidity of Liquid Droplets Open
Here we show that encapsulating active Janus particles within a drop renders it more resistant to deformation. This drop is deformed under the action of an extensional flow. Such deformation is primarily resisted by the drop interfacial te…
View article: Droplet impacts on cold surfaces
Droplet impacts on cold surfaces Open
We study drop impact for the case where the impacted surface is cooled below the freezing temperature of the liquid droplet. The freezing is found to affect the spreading dynamics of the impacting drops and, thus, the degree of surface cov…
View article: Universal Aspects of Droplet Spreading Dynamics in Newtonian and Non-Newtonian Fluids
Universal Aspects of Droplet Spreading Dynamics in Newtonian and Non-Newtonian Fluids Open
Droplet impacts are common in many applications such as coating, spraying, or printing; understanding how droplets spread after impact is thus of utmost importance. Such impacts may occur with different velocities on a variety of substrate…
View article: Universal aspects of droplet spreading dynamics in Newtonian and non-Newtonian Fluids
Universal aspects of droplet spreading dynamics in Newtonian and non-Newtonian Fluids Open
Droplet impacts are common in many applications such as coating, spraying, or printing; understanding how droplets spread after impact is thus of utmost importance. Such impacts may occur with different velocities on a variety of substrate…