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| 001 | 911210 | ||
| 005 | 20221116131015.0 | ||
| 037 | _ | _ | |a FZJ-2022-04515 |
| 041 | _ | _ | |a English |
| 100 | 1 | _ | |a Kang, Kyongok |0 P:(DE-Juel1)130749 |b 0 |e Corresponding author |
| 111 | 2 | _ | |a Invited Seminar Talk, SNU, South Korea |w South Korea |
| 245 | _ | _ | |a Orientational Glasses and Phase Behavior of Charged DNA-Rods and their Response to Shear Flow |f 2022-04-18 - |
| 260 | _ | _ | |c 2022 |
| 336 | 7 | _ | |a Conference Paper |0 33 |2 EndNote |
| 336 | 7 | _ | |a Other |2 DataCite |
| 336 | 7 | _ | |a INPROCEEDINGS |2 BibTeX |
| 336 | 7 | _ | |a LECTURE_SPEECH |2 ORCID |
| 336 | 7 | _ | |a Talk (non-conference) |b talk |m talk |0 PUB:(DE-HGF)31 |s 1668514915_2645 |2 PUB:(DE-HGF) |x Invited |
| 336 | 7 | _ | |a Other |2 DINI |
| 520 | _ | _ | |a Long and thin, highly charged colloidal rods (fd-virus particles) exhibit a glass transition at a concentration for low ionic strengths, far above the isotropic-nematic coexistence region. The morphology of the system consists of chiral-nematic mesophases with different orientations. The dynamics of single particles within the domains is arrested due to initial caging of the charged rods by their neighbors through long-ranged electrostatic interactions. The microscopic dynamics of the orientation texture in domains is found to freeze at the same concentration where single particles are dynamically arrested [1,2]. Below the glass-transition concentration, the initial morphology with large shear-aligned domains breaks up into smaller domains, and equilibrates after typically 50–100 hours. Two dynamical modes are observed below the glass transition upon equilibration. On approach of the glass-transition concentration, the slow dynamical mode increases in amplitude, while the amplitudes of a fast and slow modes become equal at the glass transition [3-6]. In the first part of this talk I will present experimental results on the glass transition, the dynamics below the glass-transition, and the phase diagram in the fd-concentration versus ionic strength.The second part of the talk will be devoted to the flow behavior of fd-suspensions in the glassy state. Such suspensions exhibit stable inhomogeneous flow profiles, depending on the applied shear rate: fracture and plug flow at low shear rates, shear-banding at intermediate shear rates, and a linear profile at sufficiently high shear rate. These flow profiles coexist with Taylor vorticity bands [7,8]. The mechanism for shear-banding in these systems with a soft, long-ranged repulsive inter-particle potential is not related to shear-gradient induced mass transport that occurs in systems with a short-ranged interaction potential [9], but is due to the classic banding scenario related to strong shear-thinning behavior [7]. It is shown that 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 [8,10]. References: [1] Phys. Rev. Lett. 110, 015901 (2013) [2] Soft Matter 9, 4401 (2013)[3] Soft Matter 10, 3311 (2014)[4] Scientific Reports 11, 3472 (2021), [5] J. Phys. Commun. 5, 065011 (2021)[6] J. Phys. Commun. 6, 015001 (2022)[7] Phys. Rev. Fluids 2, 043301 (2017)[8] J. Rheol. 66, 2, March 1st (2022)[9] Soft Matter 10, 9470 (2014) [10] J. Phys. Commun. 5, 045011 (2021) |
| 536 | _ | _ | |a 5241 - Molecular Information Processing in Cellular Systems (POF4-524) |0 G:(DE-HGF)POF4-5241 |c POF4-524 |f POF IV |x 0 |
| 909 | C | O | |o oai:juser.fz-juelich.de:911210 |p VDB |
| 910 | 1 | _ | |a Forschungszentrum Jülich |0 I:(DE-588b)5008462-8 |k FZJ |b 0 |6 P:(DE-Juel1)130749 |
| 913 | 1 | _ | |a DE-HGF |b Key Technologies |l Natural, Artificial and Cognitive Information Processing |1 G:(DE-HGF)POF4-520 |0 G:(DE-HGF)POF4-524 |3 G:(DE-HGF)POF4 |2 G:(DE-HGF)POF4-500 |4 G:(DE-HGF)POF |v Molecular and Cellular Information Processing |9 G:(DE-HGF)POF4-5241 |x 0 |
| 914 | 1 | _ | |y 2022 |
| 920 | _ | _ | |l yes |
| 920 | 1 | _ | |0 I:(DE-Juel1)IBI-4-20200312 |k IBI-4 |l Biomakromolekulare Systeme und Prozesse |x 0 |
| 980 | _ | _ | |a talk |
| 980 | _ | _ | |a VDB |
| 980 | _ | _ | |a I:(DE-Juel1)IBI-4-20200312 |
| 980 | _ | _ | |a UNRESTRICTED |
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