One and two-component colloidal glasses under shear

• Applicant: Professor Dr. Stefan U. Egelhaaf, since 10/2015 (†)
• Subject Area: Statistical Physics, Nonlinear Dynamics, Complex Systems, Soft and Fluid Matter, Biological Physics
• Term: from 2010 to 2016
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 157463299

We plan to experimentally investigate the nonlinear response of colloidal glasses to homogeneous and inhomogeneous stress fields. In addition to inhomogeneities in the stress field, such as local forces, distinct particle mobilities (realized by a two-component system) will be studied. The macroscopic stresses and deformations, as well as their transmission through the sample, will be related to changes in the microscopic structure and dynamics on an individual particle level. We will investigate the samples using confocal microscopy, light scattering and rheology while stress is applied. For this purpose a stress-controlled shear cell and indentation device will be constructed.

• DFG Programme: Research Units
• Subproject of: FOR 1394: Nonlinear Response to Probe Vitrification
• Major Instrumentation: Stress-controlled rheometer
• Instrumentation Group: 1610 Viskosimeter, Rheometer
• Ehemaliger Antragsteller: Dr. Marco Laurati, until 10/2015