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@INPROCEEDINGS{Kang:1047641,
author = {Kang, Kyongok},
title = {{C}harged {R}od-{G}lasses in non-{E}quilibrium {S}hear
{F}low {R}esponse},
reportid = {FZJ-2025-04438},
year = {2025},
abstract = {The equilibrium phase behaviour [1-3] are presented for the
concentrated suspension of bacteriophage fd, DNA-viruses
charged DNA-viruses, at sufficiently low ionic strengths
(below 1 mM Tris/HCl buffer), which is a good model system
for highly charged colloidal rods, exhibiting the phase
transitions; from the nematic-to-chiral nematic and other
hierarchical chiral-mesophases (Xpattern and helical
domains) to the glass states, in an increase of the
rod-concentration [4-5]. In this talk, experiments on both
equilibrium and the field-induced phase transition, as well
as sheer response of the glass state in flow will be
discussed. The (structural) glass transition occurs well
within the full chiral-nematic state, where the particle
dynamics and the orientation texture dynamics are
simultaneously arrested, at the same concentration [3-5].
The glass is also found to exhibit several types of
non-uniform flow profiles, depending on the externally
applied shear rate: At low shear rates plug flow is observed
and at intermediate shear rates gradient-banded flow
profiles are found [4, 5]. At high shear rates the glass is
melted, leading to a linear flow profile. Finally, as one of
interesting findings for chiral-mesophases, is a
“chiral-glass”, driven by the replica symmetry breaking
(RSB), determined by both real- and Fourier-space [6], kept
between the two “replicas” of larger chiral-nematic
domain (at a lower concentration) and the
“helical-domains” (at a higher concentration) of charged
DNA-rods [7]. As will be shown, there is a subtle interplay
between the stress originating from inter-particle
interactions within the domains and the texture stress due
to inter-domain interactions.//References[1] K. Kang and J.
K. G. Dhont, Phys. Rev. Lett. 110, 015901, 2013.[2] K. Kang,
Soft Matter, 10, 3311-3324, 2014: Soft Matter 9, 4401,
2013.[3] K. Kang, Sci. Rep. 11: 3472, 2021.[4] K. Kang, J.
Phys. Commun, 5, 045011, 2021.[5] D. Parisi, D.
Vlassopoulos, H. Kriegs, J. K. G. Dhont, and K. Kang,
Journal of Rheology 66, 365, 2022: Phys. Rev. Fluids 2,
043301 (2017).[6] K. Kang, J. Phys. Commun, 5, 065001,
2021.[7] K. Kang, J. Phys. Commun, 6, 015001, 2022.},
month = {Sep},
date = {2025-09-29},
organization = {The 9th International Soft Matter
Conference, Chania, Crete (Greece), 29
Sep 2025 - 3 Oct 2025},
subtyp = {After Call},
cin = {IBI-4},
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)6},
url = {https://juser.fz-juelich.de/record/1047641},
}