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@ARTICLE{Parisi:908050,
      author       = {Parisi, D. and Vlassopoulos, D. and Kriegs, H. and Dhont,
                      J. K. G. and Kang, K.},
      title        = {{U}nderlying mechanism of shear-banding in soft glasses of
                      charged colloidal rods with orientational domains},
      journal      = {Journal of rheology},
      volume       = {66},
      number       = {2},
      issn         = {0148-6055},
      address      = {Melville, NY [u.a.]},
      publisher    = {Inst.},
      reportid     = {FZJ-2022-02347},
      pages        = {365 - 373},
      year         = {2022},
      abstract     = {Soft glasses of colloidal rods (fd-virus particles) with
                      orientational domains were recently shown to exhibit
                      inhomogeneous flow profiles [Dhont et al., Phys. Rev. Fluids
                      2, 043301 (2017)]: fracture and accompanied plug flow at
                      small shear rates, which transits to gradient shear-banding
                      on increasing the shear rate, while a uniform flow profile
                      develops at sufficiently high shear rates. These flow
                      profiles coexist with Taylor-vorticity bands. The texture of
                      such glasses under flow conditions consists of domains with
                      varying orientations. The observed gradient shear-banding
                      was solely attributed to the strong shear thinning behavior
                      of the material inside the domains (henceforth abbreviated
                      as domain-interior), without considering the texture stress
                      that is due to interactions between the glassy domains.
                      Here, we present new experiments on the shear-banding
                      transition to assess the role played by the texture stress
                      in comparison to the domain-interior stress. For a large
                      concentration, well into the glassy state, it is found that
                      both texture stress and domain-interior stress contribute
                      significantly to the gradient shear-banding transition in
                      the shear-rate region where it occurs. On the other hand,
                      for a small concentration close to the glass-transition
                      concentration, the domains are shown to coalesce within the
                      shear-rate range where gradient shear-banding is observed.
                      As a result, the texture stress diminishes and the
                      domain-interior stress increases upon coalescence, leading
                      to a stress plateau. Thus, a subtle interplay exists between
                      the stresses arising from the structural order on two widely
                      separated length scales from interactions between domains
                      and from the rod-rod interactions within the domain-interior
                      for both concentrations.I. INTRODUCTION},
      cin          = {IBI-4},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IBI-4-20200312},
      pnm          = {5241 - Molecular Information Processing in Cellular Systems
                      (POF4-524)},
      pid          = {G:(DE-HGF)POF4-5241},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000761448700001},
      doi          = {10.1122/8.0000400},
      url          = {https://juser.fz-juelich.de/record/908050},
}