Thomas Bickel
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View article: Competition between thermocapillary and solutocapillary flows in thin liquid films
Competition between thermocapillary and solutocapillary flows in thin liquid films Open
We investigate the thermocapillary flow in a thin liquid film which is subjected to local heating, in the presence of insoluble surfactants. While surfactant molecules are first advected from warmer to cooler regions, the resulting concent…
View article: Blockage of thermocapillary flows by surface-active impurities
Blockage of thermocapillary flows by surface-active impurities Open
Thermocapillary convection is particularly effective for the control of thin\nliquid film topography or for the actuation of microparticles at the liquid-air\ninterface. Experiments with water are challenging, however, as its interface is\…
View article: Blockage of thermocapillary flows by surface-active impurities
Blockage of thermocapillary flows by surface-active impurities Open
Thermocapillary convection is particularly effective for the control of thin liquid film topography or for the actuation of microparticles at the liquid-air interface. Experiments with water are challenging, however, as its interface is pr…
View article: Unsteady drag force on an immersed sphere oscillating near a wall
Unsteady drag force on an immersed sphere oscillating near a wall Open
The unsteady hydrodynamic drag exerted on an oscillating sphere near a planar wall is addressed experimentally, theoretically, and numerically. The experiments are performed by using colloidal-probe Atomic Force Microscopy (AFM) in thermal…
View article: Surfactant-driven instability of a divergent flow
Surfactant-driven instability of a divergent flow Open
Extremely small amounts of surface-active contaminants are known to drastically modify the hydrodynamic response of the water-air interface. Surfactant concentrations as low as a few thousand molecules per square micron are sufficient to e…
View article: Modification of the Fluctuation Dynamics of Ultrathin Wetting Films
Modification of the Fluctuation Dynamics of Ultrathin Wetting Films Open
We report on the effect of intermolecular forces on the fluctuations of supported liquid films. Using an optically induced thermal gradient, we form nanometer-thin films of wetting liquids on glass substrates, where van der Waals forces ar…
View article: Spreading dynamics of reactive surfactants driven by Marangoni convection
Spreading dynamics of reactive surfactants driven by Marangoni convection Open
Enhanced diffusion of volatile, surface-active species at the water–air interface is explained by Marangoni convection.
View article: Erratum: Polarization of active Janus particles [Phys. Rev. E <b>89</b>, 050303(R) (2014)]
Erratum: Polarization of active Janus particles [Phys. Rev. E <b>89</b>, 050303(R) (2014)] Open
This corrects the article DOI: 10.1103/PhysRevE.89.050303.
View article: Wrapping of a spherical colloid by a fluid membrane
Wrapping of a spherical colloid by a fluid membrane Open
We theoretically study the elastic deformation of a fluid membrane induced by an adhering spherical colloidal particle within the framework of a Helfrich energy. Based on a full optimization of the membrane shape we find a continuous bindi…
View article: Innenrücktitelbild: Light‐Driven Transport of a Liquid Marble with and against Surface Flows (Angew. Chem. 37/2016)
Innenrücktitelbild: Light‐Driven Transport of a Liquid Marble with and against Surface Flows (Angew. Chem. 37/2016) Open
Flüssigkeitsmurmeln treiben auf Lösungen eines photoempfindlichen Tensids gemäß lichtinduzierter Marangoni-Ströme. D. Baigl et al. beschreiben in der Zuschrift auf S. 11349 ff., dass die Murmeln sich bei geringer Substratdicke überraschend…
View article: Inside Back Cover: Light‐Driven Transport of a Liquid Marble with and against Surface Flows (Angew. Chem. Int. Ed. 37/2016)
Inside Back Cover: Light‐Driven Transport of a Liquid Marble with and against Surface Flows (Angew. Chem. Int. Ed. 37/2016) Open
Floating liquid marbles can be transported on a photosensitive surfactant-laden solution by light- induced Marangoni flows. As reported by D. Baigl et al. in their Communication on page 11183 ff., the marbles remarkably move upstream (anti…
View article: Light‐Driven Transport of a Liquid Marble with and against Surface Flows
Light‐Driven Transport of a Liquid Marble with and against Surface Flows Open
Liquid marbles, that is, liquid drops coated by a hydrophobic powder, do not wet any solid or liquid substrate, making their transport and manipulation both highly desirable and challenging. Herein, we describe the light‐driven transport o…
View article: Motion of Optically Heated Spheres at the Water–Air Interface
Motion of Optically Heated Spheres at the Water–Air Interface Open
A micrometer-sized spherical particle classically equilibrates at the water-air interface in partial wetting configuration, causing about no deformation to the interface. In condition of thermal equilibrium, the particle just undergoes fai…