Microrheology of giant-micelle solutions

摘要: Optical tracer-microrheology has been applied to study the rheological properties of a concentrated surfactant solution. Under chosen conditions these surfactants self-assemble form giant polymer-like micelles, resulting in strongly viscoelastic liquid. A novel approach analysis local dynamic tracer particles is presented, based on combination single- and multi-speckle diffusing wave spectroscopy (DWS). With this technique we could significantly extend accessible frequency range key as given by loss storage modulus, G''(ω) G'(ω). high-frequency range, not standard techniques, shows good overall agreement with conventional models. However, find distinct temperature dependence characteristic modulus G0 incompatible simple picture single relaxation process.