2017/09/21 by Zhe Wang, Wang, Zhe, Takuya Iwashita +18 · 1 citation
Chemistry · Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Material Dynamics and Properties #Phase Equilibria and Thermodynamics #Soft Condensed Matter (cond-mat.soft) #Surfactants and Colloidal Systems #cond-mat.soft
paper · pdf · doi:10.48550/arxiv.1709.07507
arXiv admin note: substantial text overlap with arXiv:1611.03135
arxiv created 2017/09/21 · openalex publication_date 2017/09/21 · openalex created_date 2017/10/06 · arxiv updated 2018/05/30 · openalex updated_date 2026/07/28
The microscopic deformation mechanism of charged colloidal glasses with extended-range interactions under shear is investigated by in-situ small-angle neutron scattering, and a dynamically correlated region (DCR) is identified. This short-lived region provides the resistance to the configurational rearrangement imposed by the external deformation, as evidenced by the evolution of the size of DCR in the shear thinning regime and the quantitative agreement between the local stress sustained by DCR and the macroscopic stress from rheological measurements at low and mediate shear rates. This finding suggests that DCR is an important quantity for microscopically addressing the flow and deformation behavior of strongly interacting colloids.