Microscopic Structure of Sheared Colloids
Aqueous suspensions of monodisperse, charged, plastic spheres are known to form liquid and solid structures with average particle spacing or lattice constants on the order of the wavelength of light.1 Thus, light scattering can be used to determine both the static1 and dynamic structure2,3 of these model interacting particle systems. Such equilibrium structures are very delicate and can be destroyed by mild agitation, but will reform in a brief time if left unmolested. If such suspensions are subjected to a simple shear, the structure is visibly, modified as observed by the light scattering intensity pattern, which is related to the spatial Fourier transform of the real space configurations.
KeywordsDiffuse Ring Mild Agitation Plastic Sphere Thermal Diffuse scatteringS Incident Wave Vector
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