Microrheology methods and systems using low-coherence dynamic light scattering

摘要: Methods and systems for using dynamic light scattering, investigating local rheological responses of complex fluids over a frequency range larger than that provided by standard instrumentation. A low-coherence radiation source is used with fiber optics to allow measurements small volume spacing up approximately 1/10 picoliter. The methods are based on the response fluid mechanical in configuration allows be confined around tenth ability method accurately measure both loss storage moduli has been tested simple Newtonian liquids viscoelastic, fluids. Monitoring liquid-gel transitions polymer solutions also demonstrated. unique capability technique localize measurement can three-dimensional mapping properties heterogeneous systems. Other embodiments use open-air setups instead optical fibers transmit receive low coherence light.