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@INPROCEEDINGS{Kang:1027683,
author = {Kang, Kyongok},
title = {{N}on-equilibrium and {E}quilibrium {P}hase behaviour of
{C}harged {C}olloidal {R}ods ({DNA}-rods)},
reportid = {FZJ-2024-04001},
year = {2024},
note = {The DFG Grant number is acknowledged as KA 5628/2-1.},
abstract = {Both non-equilibrium (in electric-field and shear flow)
[1-3] and equilibrium phase behaviour [4-7] are presented
for the concentrated suspensions of charged DNA-viruses at
the low ionic strength of Tris/HCl buffer. The system is
revealed as a good model system of charged colloidal rods
(DNA-rods) to predict the phase transitions, from the
nematic-to-chiral nematic and other hierarchical
chiral-mesophases (X-pattern and helical domains) to the
(structural) glass states, in an increase of the
rod-concentration [4-6]. In last 2 decades, several
instrumentations and methods are developed with
characterizations in both signal-and image-processing (under
external fields) to access wide ranges of multiple phases
and various transitions, dynamics, and kinetics of the
interacting charged DNA-rods.Recently, as one of interesting
findings for chiral-mesophases, the long-time existing
X-pattern is turned out to be the subclass of
“chiral-glass”, shown by the replica symmetry breaking
(RSB), determined by both real- and Fourier-space [6]. This
X-pattern occurs interestingly 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]. Further interest is
then the order parameter in phase transitions, by
dissociation/association of condensed ions in the mean-field
approach (via ionic-strength dependent effective Debye
screening length and the concentration), as well as the
competition between the averaged orientation of concentrated
rods and the strength of local ordering of helical domains.
The concentration (or the number density) and orientation
are coupled via effective diameter in the chiral-mesophase
behavior.References[1] K. Kang and J.K.G. Dhont, “An
electric-field induced dynamical state in dispersions of
highly charged colloidal rods: Comparison of experiment and
theory”, Colloid. Polym. Sci. 293, 3325-3336, 2015.[2] K.
Kang, “Response of shear in bulk orientations of charged
DNA rods: Taylor- and Gradient-banding”, J. Phys. Commun,
5, 045011, 2021.[3] D. Parisi, D. Vlassopoulos, H. Kriegs,
J. K. G. Dhont, and K. Kang, “Underlying mechanism of
shear-banding in soft glasses of charged colloidal rods with
orientational domains”, Journal of Rheology 66, 365,
2022.[4] K. Kang, “Glass transition of repulsive charged
rods (fd-viruses)”, Soft Matter, 10, 3311-3324, 2014.[5]
K. Kang, “Equilibrium phase diagram and thermal responses
of charged DNA-virus rod-suspensions at low ionic
strengths”, Sci. Rep. 11: 3472, 2021.[6] K. Kang,
“Chiral glass of charged DNA rods, Cavity loops”, J.
Phys. Commun, 5, 065001, 2021.[7] K. Kang,
“Characterization of orientation correlation kinetics:
chiral-mesophase domains in suspensions charged DNA-rods”,
J. Phys. Commun, 6, 015001, 2022.},
month = {May},
date = {2024-05-21},
organization = {SoftComp 20th Anniversary Meeting,
Hotel Valpre, Lyon (France), 21 May
2024 - 24 May 2024},
subtyp = {After Call},
cin = {IBI-4},
cid = {I:(DE-Juel1)IBI-4-20200312},
pnm = {5241 - Molecular Information Processing in Cellular Systems
(POF4-524) / DFG project 495795796 - Das Phasenverhalten von
Proteinlösungen in elektrischen Feldern (495795796)},
pid = {G:(DE-HGF)POF4-5241 / G:(GEPRIS)495795796},
typ = {PUB:(DE-HGF)6},
url = {https://juser.fz-juelich.de/record/1027683},
}