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Reversible tuning of a block-copolymer nanostructure via electric fields

Titelangaben

Schmidt, Kristin ; Schoberth, Heiko G. ; Ruppel, Markus ; Zettl, Heiko ; Hänsel, Helmut ; Weiss, Thomas M. ; Urban, Volker S. ; Krausch, Georg ; Böker, Alexander:
Reversible tuning of a block-copolymer nanostructure via electric fields.
In: Nature Materials. Bd. 7 (2007) Heft 2 . - S. 142-145.
ISSN 1476-4660
DOI: https://doi.org/10.1038/nmat2068

Volltext

Link zum Volltext (externe URL): Volltext

Abstract

Block copolymers consisting of incompatible components self-assemble into microphase-separated domains yielding highly regular structures with characteristic length scales of the order of several tens of nanometres. Therefore, in the past decades, block copolymers have gained considerable potential for nanotechnological applications, such as in nanostructured networks and membranes, nanoparticle templates and high-density data storage media. However, the characteristic size of the resulting structures is usually determined by molecular parameters of the constituent polymer molecules and cannot easily be adjusted on demand. Here, we show that electric d.c. fields can be used to tune the characteristic spacing of a block-copolymer nanostructure with high accuracy by as much as 6% in a fully reversible way on a timescale in the range of several milliseconds. We discuss the influence of various physical parameters on the tuning process and study the time response of the nanostructure to the applied field. A tentative explanation of the observed effect is given on the basis of anisotropic polarizabilities and permanent dipole moments of the monomeric constituents. This electric-field-induced effect further enhances the high technological potential of block-copolymer-based soft-lithography applications

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Lehrstuhl Physikalische Chemie II
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
500 Naturwissenschaften und Mathematik > 540 Chemie
Eingestellt am: 04 Mär 2016 07:54
Letzte Änderung: 08 Mai 2020 09:54
URI: https://eref.uni-bayreuth.de/id/eprint/31342