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Effects of Electric Fields on Block Copolymer Nanostructures

  • Heiko G. Schoberth
  • Violetta Olszowka
  • Kristin Schmidt
  • Alexander BökerEmail author
Chapter
Part of the Advances in Polymer Science book series (POLYMER, volume 227)

Abstract

In this chapter we overview electric-field-induced effects on block copolymer microdomains. First, we will consider the thin film behavior and elucidate the parameters governing electric-field-induced alignment. We describe the structural evolution of the alignment in an electric field via quasi in situ scanning force microscopy (SFM) using a newly developed SFM setup that allows solvent vapor treatment in the presence of high electric fields. Second, we will turn to bulk structures and show novel effects of high field strengths on the block copolymer phase behavior. We will describe a procedure that allows tuning the morphology and size of the nanoscopic patterns by application of high electric fields and present experimental evidence for the electric-field-induced decrease of the order–disorder transition temperature in a block copolymer.

Keywords

Electric field Block copolymers Microdomain orientation In situ SFM Orientation mechanism 

Abbreviations

1D

One-dimensional

2D

Two-dimensional

CCD

Charge-coupled device

E

Electric field

F

Free energy

Mn

Number-average molecular weight

Mw

Weight-average molecular weight

ODT

Order–disorder transition

P2

Orientational order parameter

PHEMA

Poly(2-hydroxyethyl methacrylate)

PI

Polyisoprene

PMMA

Poly(methyl methacrylate)

PS

Polystyrene

PVP

Poly(2-vinyl pyridine)

S47H10M4382

Polystyrene-block-poly (2-hydroxyethyl methacrylate)-block-poly(methyl methacrylate)

S50V5078

Polystyrene-block-poly(2-vinyl pyridine)

SAXS

Small-angle X-ray scattering

SFM

Scanning force microscopy

SI

Polystyrene-block-polyisoprene diblock copolymer

TEM

Transmission electron microscopy

THF

Tetrahydrofuran

TODT

Order–disorder transition temperature

Notes

Acknowledgments

The authors thank D. Andelman, P. Bösecke, E. di Cola, F. Fischer, H. Hänsel, M. Hund, S. Hüttner, G. Krausch, H. Krejtschi, V. Kuntermann, C. Liedel, A. Mihut, T. Narayanan, C. W. Pester, S. Rehse, M. Ruppel, K. A. Schindler, F. Schubert, G. J. A. Sevink, S. Stepanov, M. Sztucki, L. Tsarkova, Y. Tsori, V. Urban, T. M. Weiss, H. Zettl, and A. V. Zvelindovsky for support of this work. We are grateful to the ESRF for provision of synchrotron beam time. This work was carried out in the framework of the Sonderforschungsbereich 481 (TP A2) funded by the German Science Foundation (DFG). AB acknowledges financial support by the Lichtenberg-Program of the VolkswagenStiftung.

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Copyright information

© Springer 2010

Authors and Affiliations

  • Heiko G. Schoberth
    • 1
  • Violetta Olszowka
    • 1
  • Kristin Schmidt
    • 1
  • Alexander Böker
    • 1
    • 2
    Email author
  1. 1.Lehrstuhl für Physikalische Chemie IIUniversität BayreuthBayreuthGermany
  2. 2.Lehrstuhl für Makromolekulare Materialien und Oberflächen and DWI an der RWTH Aachen e.V.RWTH Aachen UniversityAachenGermany

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