TY  - JOUR
AU  - Kang, K.
TI  - Image time-correlation, dynamic light scattering, and birefringence for the study of the response of anisometric colloids to external fields
JO  - Review of scientific instruments
VL  - 82
SN  - 0034-6748
CY  - [S.l.]
PB  - American Institute of Physics
M1  - PreJuSER-16100
SP  - 053903
PY  - 2011
N1  - The author thanks Professor J. K. G. Dhont for his scientific interest. This work is partially supported by the EU-FP7 Network "Nanodirect" (Contract No. CP-FP-213948-2).
AB  - In this paper, a detailed description of equipment is given, specially designed to characterize the response of non-spherical colloids to external fields. To characterize slow structural changes on a large length scale we developed an image correlation method, fast dynamics on the colloidal-particle level is probed by means of a vertically mounted, small angle dynamic light scattering setup, while the orientational order (induced by the external field) is measured with a birefringence setup with off-normal incidence. The performance of this in situ set of instruments is illustrated by experiments on concentrated dispersions of very long and thin, charged colloidal rods (fd-virus particles) in external electric fields. Here, the frequency of the field is sufficiently low to polarize electrical double layers, leading to additional inter-colloidal interactions which are found to give rise to phase/state transitions and dynamical states (K. Kang and J. K. G. Dhont, Soft Matter 6, 273, 2010).
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:21639514
UR  - <Go to ISI:>//WOS:000291106700029
DO  - DOI:10.1063/1.3589856
UR  - https://juser.fz-juelich.de/record/16100
ER  -