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Electric Field Induced Selective Disordering in Lamellar Block Copolymers

Title data

Ruppel, Markus ; Pester, Christian W. ; Langner, Karol M. ; Sevink, Geert J. A. ; Schoberth, Heiko G. ; Schmidt, Kristin ; Urban, Volker S. ; Mays, Jimmy W. ; Böker, Alexander:
Electric Field Induced Selective Disordering in Lamellar Block Copolymers.
In: ACS Nano. (2013) Issue 5 . - pp. 3854-3867.
ISSN 1936-0851
DOI: https://doi.org/10.1021/nn3059604

Official URL: Volltext

Abstract in another language

External electric fields align nanostructured block copolymers by either rotation of grains or nucleation and growth depending on how strongly the chemically distinct block copolymer components are segregated. In close vicinity to the order-disorder transition, theory and simulations suggest a third mechanism: selective disordering. We present a time-resolved small-angle X-ray scattering study that demonstrates how an electric field can indeed selectively disintegrate ill-aligned lamellae in a lyotropic block copolymer solution, while lamellae with interfaces oriented parallel to the applied field prevail. The present study adds an additional mechanism to the experimentally corroborated suite of mechanistic pathways, by which nanostructured block copolymers can align with an electric field. Our results further unveil the benefit of electric field assisted annealing for mitigating orientational disorder and topological defects in block copolymer mesophases, both in close vicinity to the order-disorder transition and well below it.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science > Chair Material and Process Simulations
Research Institutions > Collaborative Research Centers, Research Unit > SFB 481 Komplexe Makromolekül- und Hybridsysteme in inneren und äußeren Feldern
Faculties
Faculties > Faculty of Engineering Science
Research Institutions
Research Institutions > Collaborative Research Centers, Research Unit
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
500 Science > 540 Chemistry
Date Deposited: 04 Mar 2016 08:22
Last Modified: 04 Mar 2016 08:26
URI: https://eref.uni-bayreuth.de/id/eprint/31345