Laurence Ramos
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View article: Synthesis of spherical mesoporous silica beads with tunable size, stiffness and porosity
Synthesis of spherical mesoporous silica beads with tunable size, stiffness and porosity Open
International audience
View article: Synthesis of spherical mesoporous silica beads with tunable size, stiffness and porosity
Synthesis of spherical mesoporous silica beads with tunable size, stiffness and porosity Open
We present an innovative template-free water-based sol-gel method to produce uniform mesoporous silica beads of millimeter size, which have tunable size, stiffness and porosity, and could be used for adsorption applications. Our protocol e…
View article: Edible Soft Matter
Edible Soft Matter Open
Food is essential to life but also sees a catalog of demands which include feeding mankind without damaging the planet, tackling the rise of diet-related diseases, and providing tasty, healthy and nutritious foods. Understanding, designing…
View article: Ductile-to-brittle transition and yielding in soft amorphous materials: perspectives and open questions
Ductile-to-brittle transition and yielding in soft amorphous materials: perspectives and open questions Open
Soft amorphous materials are viscoelastic solids ubiquitously found around us, from clays and cementitious pastes to emulsions and physical gels encountered in food or biomedical engineering. Under an external deformation, these materials …
View article: Scaling Properties of Gelling Systems in Nonlinear Shear Experiments
Scaling Properties of Gelling Systems in Nonlinear Shear Experiments Open
We study model near-critical polymer gelling systems made of gluten proteins dispersions stabilized at different distances from the gel point. We impose different shear rates and follow the time evolution of the stress. For sufficiently la…
View article: Space-resolved dynamic light scattering within a millimeter-sized drop: From Brownian diffusion to the swelling of hydrogel beads
Space-resolved dynamic light scattering within a millimeter-sized drop: From Brownian diffusion to the swelling of hydrogel beads Open
We present a dynamic light scattering setup to probe, with time and space resolution, the microscopic dynamics of soft matter systems confined within millimeter-sized spherical drops. By using an ad hoc optical layout, we tackle the challe…
View article: Scaling Properties of Gelling Systems in Nonlinear Shear Experiments
Scaling Properties of Gelling Systems in Nonlinear Shear Experiments Open
We study model near-critical polymer gelling systems made of gluten protein dispersions stabilized at different distances from the gel point. We impose different shear rates and follow the time evolution of the stress. For sufficiently lar…
View article: Delicate Analysis of Interacting Proteins and Their Assemblies by Flow Field-Flow Fractionation Techniques
Delicate Analysis of Interacting Proteins and Their Assemblies by Flow Field-Flow Fractionation Techniques Open
We study the efficiency of several asymmetrical flow field-flow fractionation (AF4) techniques to investigate self-associating wheat gluten proteins. We compare the use of a denaturing buffer including sodium dodecyl sulfate (SDS) and a mi…
View article: Enzymatic Degradation of Biopolymers:A combined Light Scattering - Fluorescence study
Enzymatic Degradation of Biopolymers:A combined Light Scattering - Fluorescence study Open
International audience
View article: Space-resolved dynamic light scattering within a millimetric drop: from Brownian diffusion to the swelling of hydrogel beads
Space-resolved dynamic light scattering within a millimetric drop: from Brownian diffusion to the swelling of hydrogel beads Open
We present a novel dynamic light scattering setup to probe, with time and space resolution, the microscopic dynamics of soft matter systems confined within millimeter-sized spherical drops. By using an ad-hoc optical layout, we tackle the …
View article: Ductile-to-brittle transition and yielding in soft amorphous materials: perspectives and open questions
Ductile-to-brittle transition and yielding in soft amorphous materials: perspectives and open questions Open
The manuscript offers a critical perspective on the shear-induced solid-to-liquid transition in amorphous materials, synthesizing insights from the talks and informal discussions that unfolded during a week of vibrant exchange at the Loren…
View article: Soft matter roadmap<sup>*</sup>
Soft matter roadmap<sup>*</sup> Open
Soft materials are usually defined as materials made of mesoscopic entities, often self-organised, sensitive to thermal fluctuations and to weak perturbations. Archetypal examples are colloids, polymers, amphiphiles, liquid crystals, foams…
View article: A double rigidity transition rules the fate of drying colloidal drops
A double rigidity transition rules the fate of drying colloidal drops Open
The evaporation of drops of colloidal suspensions plays an important role in numerous contexts, such as the production of powdered dairies, the synthesis of functional supraparticles, and virus and bacteria survival in aerosols or drops on…
View article: A double rigidity transition rules the fate of drying colloidal drops
A double rigidity transition rules the fate of drying colloidal drops Open
Time laps of a drop of nanoparticles suspension drying on top of a hydrophobic surface. A first regime with a homogeneous shrinkage is followed by a regime where an air bubble nucleates and grows. The pictures combine standard and speckle …
View article: A unified state diagram for the yielding transition of soft colloids
A unified state diagram for the yielding transition of soft colloids Open
Data for the manuscript "A unified state diagram for the yielding transition of soft colloids" to appear in Nature Physics
View article: A unified state diagram for the yielding transition of soft colloids
A unified state diagram for the yielding transition of soft colloids Open
Concentrated colloidal suspensions and emulsions are amorphous soft solids, widespread in technological and industrial applications and studied as model systems in physics and material sciences. They are easily fluidized by applying a mech…
View article: Kitchen flows: Making science more accessible, affordable, and curiosity driven
Kitchen flows: Making science more accessible, affordable, and curiosity driven Open
In this Special Issue, we celebrate the connection between the physics of fluids, food science and education. We received over 30 articles concerning all types of kitchen flows, from simple to complex, from small to large scale. They inclu…
View article: Exploiting the lower disorder-to-order temperature in polystyrene-<i>b</i>-poly(<i>n-</i>butyl acrylate)-<i>b</i>-polystyrene triblock copolymers to increase their flow resistance at high temperature
Exploiting the lower disorder-to-order temperature in polystyrene-<i>b</i>-poly(<i>n-</i>butyl acrylate)-<i>b</i>-polystyrene triblock copolymers to increase their flow resistance at high temperature Open
This work focuses on the temperature-dependent structural and rheological characterization of polystyrene-b-poly(n-butyl acrylate)-b-polystyrene triblock copolymers (PS-b-PnBA-b-PS) in the melt and, in particular, on their ability to show …
View article: Flow of gluten with tunable protein composition: From stress undershoot to stress overshoot and strain hardening
Flow of gluten with tunable protein composition: From stress undershoot to stress overshoot and strain hardening Open
Understanding the origin of the unique rheological properties of wheat gluten, the protein fraction of wheat grain, is crucial in bread-making processes and has raised questions of scientists for decades. Gluten is a complex mixture of two…
View article: Controlling the volume fraction of glass-forming colloidal suspensions using thermosensitive host “mesogels”
Controlling the volume fraction of glass-forming colloidal suspensions using thermosensitive host “mesogels” Open
The key parameter controlling the glass transition of colloidal suspensions is φ, the fraction of the sample volume occupied by the particles. Unfortunately, changing φ by varying an external parameter, e.g., temperature T as in molecular …
View article: Data associated with the manuscript 'Controlling the volume fraction of glass-forming colloidal suspensions using thermosensitive host 'mesogels' (J. Chem. Phys)
Data associated with the manuscript 'Controlling the volume fraction of glass-forming colloidal suspensions using thermosensitive host 'mesogels' (J. Chem. Phys) Open
Experimental data shown in the figures included in the article and the supporting material. The 'Readme.pdf' file provides a short descrption of each of the data files and links them with the corresponding figure.
View article: Data associated with the manuscript 'Controlling the volume fraction of glass-forming colloidal suspensions using thermosensitive host 'mesogels' (J. Chem. Phys)
Data associated with the manuscript 'Controlling the volume fraction of glass-forming colloidal suspensions using thermosensitive host 'mesogels' (J. Chem. Phys) Open
Experimental data shown in the figures included in the article and the supporting material. The 'Readme.pdf' file provides a short descrption of each of the data files and links them with the corresponding figure.
View article: Competition between shear and biaxial extensional viscous dissipation in the expansion dynamics of Newtonian and rheo-thinning liquid sheets
Competition between shear and biaxial extensional viscous dissipation in the expansion dynamics of Newtonian and rheo-thinning liquid sheets Open
When a drop of fluid hits a small solid target of comparable size, it expands radially until reaching a maximum diameter and subsequently recedes. In this work, we show that the expansion process of liquid sheets is controlled by a combina…
View article: Viscoelasticity and elastocapillarity effects in the impact of drops on a repellent surface
Viscoelasticity and elastocapillarity effects in the impact of drops on a repellent surface Open
We investigate freely expanding viscoelastic sheets. The sheets are produced by the impact of drops on a quartz plate covered with a thin layer of liquid nitrogen that suppresses shear viscous dissipation as a result of the cold Leidenfros…
View article: Sunflower Proteins at Air–Water and Oil–Water Interfaces
Sunflower Proteins at Air–Water and Oil–Water Interfaces Open
The adsorption of a sunflower protein extract at two air-water and oil-water interfaces is investigated using tensiometry, dilational viscoelasticity, and ellipsometry. For both interfaces, a three step mechanism was evidenced thanks to ma…
View article: Viscoelasticity and elastocapillarity effects in the impact of drops on a repellent surface
Viscoelasticity and elastocapillarity effects in the impact of drops on a repellent surface Open
Damped harmonic oscillator including viscoelasticity and biaxial extensional dissipation to model the dynamics of expansion of viscoelastic and Newtonian drops upon impact on a repellent surface.
View article: Instabilities in freely expanding sheets of associating viscoelastic fluids
Instabilities in freely expanding sheets of associating viscoelastic fluids Open
We use the impact of drops on a small solid target as a tool to investigate the behavior of viscoelastic fluids under extreme deformation rates.