ArticleProceedings of the National Academy of Sciences of the United States of America2023
Investigation of the yielding transition in concentrated colloidal systems via rheo-XPCS.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed.
- Machine-learning-informed scattering correlation analysis of sheared colloids.Journal of applied crystallography · 2025Article
- Transport coefficient approach for characterizing nonequilibrium dynamics in soft matter.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- Rheological Properties of High Concentration Coal Slime.ACS omega · 2024Article
- Investigation of the yielding transition in concentrated colloidal systems via rheo-XPCS.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
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7 authors.
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Abstract
We probe the microstructural yielding dynamics of a concentrated colloidal system by performing creep/recovery tests with simultaneous collection of coherent scattering data via X-ray Photon Correlation Spectroscopy (XPCS). This combination of rheology and scattering allows for time-resolved observations of the microstructural dynamics as yielding occurs, which can be linked back to the applied rheological deformation to form structure-property relations. Under sufficiently small applied creep stresses, examination of the correlation in the flow direction reveals that the scattering response recorrelates with its predeformed state, indicating nearly complete microstructural recovery, and the dynamics of the system under these conditions slows considerably. Conversely, larger creep stresses increase the speed of the dynamics under both applied creep and recovery. The data show a strong connection between the microstructural dynamics and the acquisition of unrecoverable strain. By comparing this relationship to that predicted from homogeneous, affine shearing, we find that the yielding transition in concentrated colloidal systems is highly heterogeneous on the microstructural level.
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