Fascinating rheological properties like shear thickening/thinning and anisotropic viscosity arise from underlying structure in complex fluids. We develop and use techniques to simultaneously analyze emergent, large-scale properties and image particle-level positions and stresses in such suspensions.
Did you know that your brighfield or confocal microscope can actually measure stresses in colloidal materials? Here we introduce our SALSA (Stress Assessment from Local Structrure Anisotropy) method determining the stresses in hard-sphere colloidal suspensions. By just using the particle positions, SALSA can effectively transform your micorscope into a local pressure gauge.
Visualization, coarsening, and flow dynamics of focal conic domains in simulated smectic-A liquid crystals
Our shear thickening paper that settles a decades-long debate in suspension rheology has been selected as PRL Editor's Suggestion.
We introduced an experiment to solve the mystry of how Oobleck works.