{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/80596"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/80596","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"X -Ray Diffraction Rotational Microrheology","abstract":"Rotational single particle tracking microrheology can be used to find the storage and dissipative behavior of viscoelastic fluids of much higher viscosity than translational single particle tracking. The technique of X-ray diffraction rotational tracking has the ability to track the rotational motion of single crystals to a resolution of 80murad with a time resolution of 0.02 seconds. Rotational microrheology studies of single crystal Alumina tracer particles suspended in liquid decanoic acid show subdiffusive behavior transitioning towards diffusive behavior with a crossover time of 20-50 sec. 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