Publications by authors named "Anne Bouchaudy"
In the present work, we use Mach-Zehnder interferometry to thoroughly investigate the drying dynamics of a 2D confined drop of a charged colloidal dispersion. This technique makes it possible to measure the colloid concentration field during the drying of the drop at a high accuracy (about 0.5%) and with a high temporal and spatial resolution (about 1 frame per s and 5 μm per pixel).
View Article and Find Full Text PDFWe first report an original setup that enables continuous measurements of stresses induced by the drying of confined drops of complex fluids. This setup is mainly based on a precision scale working with an electromagnetic force compensation technique that provides accurate measurements of forces, while allowing simultaneously controlled evaporation rates, in situ microscopic observations, and thus quantitative estimates of normal stresses. We then performed an extensive study of the drying of a charged colloidal dispersion using this setup.
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- - This study introduces a new microfluidic method that combines pervaporation and Quake valves to create microscale materials (about 10 × 100 μm(2) × 1 cm) with varying compositions along their length.
- - The technique uses a thin PDMS membrane to concentrate solutes or particles by pumping solutions from different reservoirs into a microfluidic channel, enabling the gradual formation of dense materials.
- - The research demonstrates the ability to fabricate nanomaterials and polymer composites with controlled spatial gradients, achieving clear patterns with a resolution of approximately 50 μm for colloidal materials and 1 mm for polymers due to diffusion.