Particle contacts and granular suspension rheology

Concentrated suspensions of athermal grains shear thicken easily. Until recently, this has been explained by the formation of ’hydroclusters’ due to lubrication forces. I review recent evidence pointing instead to the stress-driven formation of inter-particle contacts. I show that by careful consideration of the different kinds of possible constraints to motion at such contacts, itLire la suite

Wearable Eccrine Sweat Biosensing

Despite the many advantages of eccrine perspiration (sweat) compared to other biofluids (particularly in “wearable” devices), sweat remains an underrepresented source of biomarker analytes compared to the established biofluids blood, urine, and saliva. Several challenges have historically kept sweat from its place in the pantheon of clinical samples. These challenges include very low sample volumesLire la suite

Séminaire Imagerie multispectrale

L’acquisition de données réactionnelles (coefficients de diffusion des réactifs, cinétiques, enthalpies) est essentielle en génie des procédés, ces paramètres étant déterminants pour la conception et le développement d’équipements industriels. L’outil microfluidique permet l’acquisition de données dans des conditions inaccessibles en batch, donnant accès à une échelle micrométrique où les écoulements et les transferts sont parfaitementLire la suite