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| 001 | 151478 | ||
| 005 | 20240619083458.0 | ||
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| 037 | _ | _ | |a FZJ-2014-01416 |
| 041 | _ | _ | |a English |
| 082 | _ | _ | |a 530 |
| 100 | 1 | _ | |a Dhont, Jan K.G. |0 P:(DE-Juel1)130616 |b 0 |e Corresponding author |u fzj |
| 245 | _ | _ | |a An electric-field induced dynamical state in dispersions of charged colloidal rods |
| 260 | _ | _ | |a Cambridge |c 2014 |b Royal Society of Chemistry (RSC) |
| 336 | 7 | _ | |a Journal Article |b journal |m journal |0 PUB:(DE-HGF)16 |s 151478 |2 PUB:(DE-HGF) |
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| 500 | _ | _ | |3 POF3_Assignment on 2016-02-29 |
| 520 | _ | _ | |a The response of concentrated dispersions of charged colloids to low-frequency electric fields is governed by field-induced inter-colloidal interactions resulting from the polarization of electric double layers and the layer of condensed ions, association and dissociation of condensed ions, as well as hydrodynamic interactions through field-induced electro-osmotic flow. The phases and states that can be formed by such field-induced interactions are an essentially unexplored field of research. Experiments on concentrated suspensions of rod-like colloids (fd-virus particles), within the isotropic–nematic phase coexistence region, showed that a number of phases/states are induced, depending on the field amplitude and frequency [Soft Matter, 2010, 6, 273]. In particular, a dynamical state is found where nematic domains form and melt on a time scale of the order of seconds. We discuss the microscopic origin of this dynamical state, which is attributed to the cyclic, electric-field induced dissociation and association of condensed ions. A semi-quantitative theory is presented for the dynamics of melting and formation of nematic domains, including a model for the field-induced dissociation/association of condensed ions. The resulting equation of motion for the orientational order parameter is solved numerically for parameters complying with the fd-virus system. A limit-cycle is found, with a cycling-time that diverges at the transition line in the field-amplitude versus frequency plane where the dynamical state first appears, in accord with experimental findings. |
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| 700 | 1 | _ | |a Kang, Kyongok |0 P:(DE-Juel1)130749 |b 1 |
| 773 | _ | _ | |a 10.1039/c3sm52277f |g Vol. 10, no. 12, p. 1987 - |0 PERI:(DE-600)2191476-X |n 12 |p 1987-2007 |t Soft matter |v 10 |y 2014 |x 1744-6848 |
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