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Electric Field Induced Control of Thin Film Diblock Copolymer Domain Orientation

Published online by Cambridge University Press:  10 February 2011

T. L. Morkved ,
W. A. Lopes ,
M. Lu ,
A. M. Urbas ,
H. M. Jaeger ,
P. Mansky  and
T. P. Russell
T. L. Morkved
Affiliation:
The James Franck Instituteand Department of Physics, The University of Chicago, Chicago, Illinois 60637.
W. A. Lopes
Affiliation:
The James Franck Instituteand Department of Physics, The University of Chicago, Chicago, Illinois 60637.
M. Lu
Affiliation:
The James Franck Instituteand Department of Physics, The University of Chicago, Chicago, Illinois 60637.
A. M. Urbas
Affiliation:
The James Franck Instituteand Department of Physics, The University of Chicago, Chicago, Illinois 60637.
H. M. Jaeger
Affiliation:
The James Franck Instituteand Department of Physics, The University of Chicago, Chicago, Illinois 60637.
P. Mansky
Affiliation:
Conte Center for Polymer Research, University of Massachusetts, Amherst, MA 01003
T. P. Russell
Affiliation:
Conte Center for Polymer Research, University of Massachusetts, Amherst, MA 01003
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Abstract

Local control of domain orientation in diblock copolymer thin films is demonstrated through the use of external electric fields. Thin films of a polystyrene-polymethylmethacrylate diblock copolymers, denoted P(S-b-MMA), were spin coated onto silicon nitride membrane substrates with prefabricated in-plane electrodes, forming cylindrical PMMA microdomains. Films annealed under an applied electric field (E ≤ 37V/μm) at 250°C for 24h under an argon atmosphere showed an alignment of the cylindrical microdomains parallel to the electric field lines. A quantitative measure of the degree of alignment was obtained by correlating the local field strength, E, and direction with the observed cylinder orientation. The alignment was found to saturate above E≈30V/μm, and to decrease rapidly as E falls below this value.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 461: Symposia BB – Morphological Control in Multiphase Polymer Mix… , 1996 , 109
Copyright
Copyright © Materials Research Society 1997

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References

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