TY  - JOUR
AU  - Dhont, J.K.G.
AU  - Kang, K.
TI  - Electric-field-induced polarization of the layer of condensed ions on cylindrical colloids
JO  - The European physical journal / E
VL  - 34
SN  - 1292-8941
CY  - Berlin
PB  - Springer
M1  - PreJuSER-15127
SP  - 40
PY  - 2011
N1  - This work has significantly benefitted from many discussions with Prof. G.S. Manning. Part of this research was supported by the Trans-regio SFB 6018 "Physics of Colloidal Dispersions in External Fields" and by the EU-FP7 Network "NanoDirect" (contract number CP-FP-213948-2).
AB  - In concentrated suspensions of charged colloids, interactions between colloids can be induced by an external electric field through the polarization of charge distributions (within the diffusive double layer and the layer of condensed ions) and/or electro-osmotic flow. In case of rod-like colloids, these field-induced inter-colloidal interactions have recently been shown to lead to anomalous orientation perpendicular to the external field, and to phase/state transitions and dynamical states, depending on the field amplitude and frequency of the external field. As a first step towards a (semi-) quantitative understanding of these phenomena, we present a linear-response analysis of the frequency-dependent polarization of the layer of condensed ions on a single, long and thin cylindrical colloid. The in-phase and out-phase response functions for the charge distribution and the electric potential are calculated for arbitrary orientation of the cylindrical colloid. The frequency-dependent degree of alignment, which is proportional to the electric-field-induced birefringence, is calculated as well, and compared to experiments on dilute fd virus suspensions.
KW  - Algorithms
KW  - Colloids: chemistry
KW  - Electricity
KW  - Electrochemistry: methods
KW  - Electrolytes
KW  - Ions
KW  - Materials Testing
KW  - Models, Chemical
KW  - Models, Statistical
KW  - Particle Size
KW  - Physics: methods
KW  - Surface Properties
KW  - Suspensions
KW  - Colloids (NLM Chemicals)
KW  - Electrolytes (NLM Chemicals)
KW  - Ions (NLM Chemicals)
KW  - Suspensions (NLM Chemicals)
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:21499963
UR  - <Go to ISI:>//WOS:000290537800007
DO  - DOI:10.1140/epje/i2011-11040-9
UR  - https://juser.fz-juelich.de/record/15127
ER  -