CO2 Adsorption Enhanced by Tuning the Layer Charge in a Clay Mineral

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Intercalation of CO2 Selected by Type of Interlayer Cation in Dried Synthetic Hectorite

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Influence of CO2 on Nanoconfined Water in a Clay Mineral

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Dipolar ordering of clay particles in various carrier fluids

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Electric-stress-induced Slip Lines in Jammed Particle Monolayers

Drops fully covered by particles, so called Pickering emulsion drops, are used to stabilize emulsions and are ideal templates for producing particles and advanced capsules. Recent studies show how electrohydrodynamic circulation flows in drops can structure free particles on their surfaces. In this article, we study the structure of Pickering drops subjected to DC E-fields. Due to its effects, we observe plastic (irreversible) deformation of the two-dimensional granuar solid covering the droplet, including particle reorganisation similar to the “grain layer gliding” and “block gliding” typical of jammed granular matter

Electric field nematic alignment of fluorohectorite clay particles in oligomeric matrices

We study the behavior of fluorohectorite synthetic clay particles dispersed in paraffin wax. We report wide-angle x-ray scattering related to electric-field-induced alignment of the embedded clay particles. The development of anisotropic arrangement of the particles is measured during melting and crystallization of the composites. The degree of anisotropy is quantified by fitting azimuthal changes of the clay diffraction peak intensity to the Maier-Saupe function. This parametric function is then used to extract both the full width at half maximum (FWHM) and the amplitude of the anisotropic scattering and eventually to estimate a nematic order parameter for this system. Finally, the time evolution of the one-to-zero and zero-to-one water layer transition in paraffin embedded fluorohectorite clay galleries is presented, and we demonstrate that such particles can be used as “meso-detectors” for monitoring the local water content in bulk carrier matrices, such as paraffin wax

Active structuring of colloidal armour on liquid drops

Adsorption and assembly of colloidal particles at the surface of liquid droplets are at the base of particle-stabilized emulsions and templating. Here we report that electrohydrodynamic and electro-rheological effects in leaky-dielectric liquid drops can be used to structure and dynamically control colloidal particle assemblies at drop surfaces, including electric-field-assisted convective assembly of jammed colloidal ‘ribbons’, electro-rheological colloidal chains confined to a two-dimensional surface and spinning colloidal domains on that surface. In addition, we demonstrate the size control of ‘pupil’-like openings in colloidal shells. We anticipate that electric field manipulation of colloids in leaky dielectrics can lead to new routes of colloidosome assembly and design for ‘smart armoured’ droplets