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Scaling behavior of the reorientation kinetics of block copolymers exposed to electric fields

Title data

Schmidt, Kristin ; Schoberth, Heiko G. ; Schubert, Frank ; Hänsel, Helmut ; Fischer, Franz ; Weiss, Thomas M. ; Sevink, Geert J. A. ; Zvelindovsky, A. V. ; Böker, Alexander ; Krausch, Georg:
Scaling behavior of the reorientation kinetics of block copolymers exposed to electric fields.
In: Soft Matter. Vol. 3 (2007) Issue 4 . - pp. 448-453.
ISSN 1744-6848
DOI: https://doi.org/10.1039/B614143A

Official URL: Volltext

Project information

Project financing: Sonderforschungsbereich SFB481

Abstract in another language

We have followed the reorientation kinetics of various block copolymer solutions exposed to an external electric DC field. The characteristic time constants follow a power law indicating that the reorientation is driven by a decrease in electrostatic energy. Moreover, the observed exponent suggests an activated process in line with the expectations for a nucleation and growth process. When properly scaled, the data collapse onto a single master curve spanning several orders of magnitude both in reduced time and in reduced energy. The power law dependence of the rate of reorientation derived from computer simulations based on dynamic density functional theory agrees well with the experimental observations. First experiments in AC electric fields at sufficiently high frequencies confirm the notion that the reorientation process is dominated by differences in the dielectric constants rather than by mobile ions.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry II
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
500 Science > 540 Chemistry
Date Deposited: 04 Mar 2016 07:33
Last Modified: 27 Apr 2016 12:46
URI: https://eref.uni-bayreuth.de/id/eprint/31339