Complex Fluids
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.
Far-from-equilibrium sheared colloidal liquids: Disentangling relaxation, advection, and shear-induced diffusion
Biaxial shear of confined colloidal hard spheres: the structure and rheology of the vorticity-aligned string phase
A multi-axis confocal rheoscope for studying shear flow of structured fluids
The effect of shear flow on the rotational diffusion of a single axisymmetric particle
Wall Slip of Bidisperse Linear Polymer Melts
Defect Transport in Crystals of Colloidal Peanuts
Read our paper on dislocation motion in crystals of colloidal peanuts.
Adding an Additional Dimension to the Measurement of Viscosity
Using a Biaxial Confocal-Rheoscope to Study Squishy Materials
Freezing of Colloidal Crystal on a Square Lattice
Here a colloidal crystal freezes onto a square lattice template. The video is sped up by a factor of about 20.
Drop break-up of lyotripic surfactant in lamellar phase
This movie shows the break-up of a lyotropic surfactant in the lamellar phase. The break-up is symmetrip about the minimum radius and no satellite drops are formed. The frame rate is 20,000 f.p.s.