Abstract Micellar solubilization is a transport process occurring in surfactant‐stabilized emulsions that can lead to Marangoni flow and droplet motility. Active droplets exhibit self‐propulsion pairwise repulsion due processes and/or products raising the droplet's interfacial tension. Here, we report with opposite behavior, wherein decreases tension causes attract. We characterize influence of oil chemical structure, nonionic surfactant concentration on tensions flows solubilizing...

The gravitational settling of oil droplets solubilizing in an aqueous micellar solution contained a capillary channel is investigated. motion these active reflects competition between and Marangoni forces, the latter due to interfacial tension gradients generated by differences filled-micelle concentrations along oil-water interface. This studied varying surfactant concentration, density difference droplet continuous phase, viscosity phase. force enhances speed when compared...

An experimental investigation and the optical modeling of structural coloration produced from total internal reflection interference within 3D microstructures are described. Ray-tracing simulations coupled with color visualization spectral analysis techniques used to model, examine, rationalize iridescence generated for a range microgeometries, including hemicylinders truncated hemispheres, under varying illumination conditions. approach deconstruct observed complex far-field features into...

Oxygen fugacity (ƒO2) controls the speciation of COH fluids in Earth's mantle; a major question is whether sublithospheric mantle metal-saturated, maintaining ƒO2 near Iron-Wüstite (IW) buffer reaction. If so, then from this source will be dominated by CH4+H2, rather than more oxidized CO2-H2O commonly considered petrological studies. A key to found rare but widespread examples natural mineral assemblages that require unusually low ƒO2. We summarize an investigation super-reduced corundum...

Directionally solidified WC –W 2 C ceramics containing 40 at% carbon, corresponding to the eutectoid composition, were produced by laser surface melt processing. The resulting microstructures showed a lamellar‐type eutectic/eutectoid microstructure with minor phase embedded in W matrix phase. interlamellar spacing (λ) regions followed relationship V λ 3.8 = constant, smallest of 331 ± 36 nm achieved 3.24 mm/s processed sample. indentation hardness increased decreasing spacing, and Vickers...

The development of materials and methods for controlling iridescent structural color arising from optical interference has attracted considerable attention a variety applications ranging anticounterfeiting to displays. Here, we investigate generated by multibounce reflection within metallized microstructures. multi-bounce mechanism, which was recently reported, previously only been studied where reflectivity originates total internal reflections on concave interface. By instead inducing with...

Reflected coloration can be generated in microtextured materials via multipath total internal reflection interference. Here, the reflected iridescent is tuned through dye absorption of evanescent wave that at optical interface upon reflection. Using quantitative angle-resolved spectral analysis combined with a ray tracing simulation, it demonstrated multibounce trajectories enhance efficiency and usefulness modulating colors. Depending on absorbance spectrum used amount coated interface,...

Abstract Micellar solubilization is a transport process occurring in surfactant‐stabilized emulsions that can lead to Marangoni flow and droplet motility. Active droplets exhibit self‐propulsion pairwise repulsion due processes and/or products raising the droplet's interfacial tension. Here, we report with opposite behavior, wherein decreases tension causes attract. We characterize influence of oil chemical structure, nonionic surfactant concentration on tensions flows solubilizing...

Humidity sensors are important components in healthcare monitoring and advanced tactile sensing systems. However, low sensitivity poor mechanical properties limit their practical applications integrated haptic platforms such as artificial skin. Here, photoluminescence (PL)-type humidity materials with simultaneously high sensitivity, stretchability, healability reported based on poly(vinyl alcohol) (PVA) composite gels comprising CdxSe1–xZnyS1–y quantum dots (QDs). A droplet-assisted...

Solubilization is a spontaneous transport process occurring in surfactant-stabilized emulsions that can lead to Marangoni flow and droplet motility. Conventionally, active droplets exhibit self-propulsion pairwise repulsion due solubilization processes and/or products raising the droplet’s interfacial tension. Here, we report with opposite behavior, wherein its decrease tension cause attract. We systematically characterize influence of oil structure, nonionic surfactant concentration on...

The development of materials and methods for controlling iridescent structural color arising from optical interference has attracted considerable attention a variety applications ranging anticounterfeiting to displays. Here, we investigate high-reflectivity generated by multi-bounce reflection within metallized microstructures describe the relationships between coloration, efficiency, microstructure geometry. Ray tracing simulations are combined with experimental, angularly resolved...

Here, structural color generated by total internal reflection (TIR) interference at microscale concave interfaces is tuned via evanescent wave absorption dyes. Using quantitative angle-resolved spectral analysis combined with ray tracing simulation, it demonstrated that the multibounce TIR trajectories enhance efficiency of dye and usefulness in modulating reflected colors. Depending on absorbance spectrum used, amount coated interface, angle-dependent colors can be predictably altered. The...

The study of active colloidal microswimmers with tunable phoretic and self-organizational behaviors is important for understanding out-of-equilibrium systems the design functional, adaptive matter. Solubilizing, self-propelling droplets have emerged as a rich chemical platform exploration behaviors, but isotropic rely on spontaneous symmetry breaking to sustain motion. introduction permanent asymmetry, e.g. in form biphasic Janus droplet, has not been explored previously comprehensive...

<p>The study of active colloidal microswimmers with tunable phoretic and self-organizational behaviors is important for understanding out-of-equilibrium systems the design functional, adaptive matter. Solubilizing, self-propelling droplets have emerged as a rich chemical platform exploration behaviors, but isotropic rely on spontaneous symmetry breaking to sustain motion. The introduction permanent asymmetry, e.g. in form biphasic Janus droplet, has not been explored previously...

The study of active colloidal microswimmers with tunable phoretic and self-organizational behaviors is important for understanding out-of-equilibrium systems the design functional, adaptive matter. Solubilizing, self-propelling droplets have emerged as a rich chemical platform exploration behaviors, but isotropic rely on spontaneous symmetry breaking to sustain motion. introduction permanent asymmetry, e.g. in form biphasic Janus droplet, has not been explored previously comprehensive...

Here, structural color generated by total internal reflection (TIR) interference at microscale concave interfaces is tuned via evanescent wave absorption dyes. Using quantitative angle-resolved spectral analysis combined with ray tracing simulation, it demonstrated that the multibounce TIR trajectories enhance efficiency of dye and usefulness in modulating reflected colors. Depending on absorbance spectrum used, amount coated interface, angle-dependent colors can be predictably altered. The...

Solubilization is a spontaneous transport process occurring in surfactant-stabilized emulsions that can lead to Marangoni flow and droplet motility. Conventionally, active droplets exhibit self-propulsion pairwise repulsion due solubilization processes and/or products raising the droplet’s interfacial tension. Here, we report with opposite behavior, wherein its decrease tension cause attract. We systematically characterize influence of oil structure, nonionic surfactant concentration on...

The gravitational settling of oil droplets solubilizing in an aqueous micellar solution contained a capillary channel is investigated. motion these active reflects competition between and Marangoni forces, the latter due to interfacial tension gradients generated by differences filled- micelle concentrations along oil-water interface. This studied varying surfactant concentration, density difference droplet continuous phase, viscosity phase. force enhances speed when compared...

Stochastic differential equations play an important role in various applications when modeling systems that have either random perturbations or chaotic dynamics at faster time scales. The evolution of the probability distribution a stochastic equation is described by Fokker-Planck equation, which second order parabolic partial equation. Previous work combined artificial neural network and Monte Carlo data to solve stationary equations. This paper extends this approach dependent focus on...

This report describes the experimental investigation and optical modeling of structural coloration produced from total internal reflection interference within 3D microstructures. Ray tracing simulations coupled with color visualization spectral analysis techniques are used to model, examine, rationalize iridescence generated for a range micro-geometries, including hemicylinders truncated hemispheres, under varying illumination conditions. An approach deconstruct observed complex far-field...