Undulation instability in block-copolymer lamellae subjected to a perpendicular electric field

Mark W. Matsen
2006 Soft Matter  
We examine the stability of lamellar stacks in the presence of an electric field, , applied normal to the lamellae. Calculations are performed with self-consistent field theory (SCFT) supplemented by an exact treatment of the electrostatic energy for linear dielectric materials. The calculations identify a critical electric field, , beyond which the lamellar stack becomes unstable with respect to undulations. This rapidly decreases towards zero as the number of lamellae in the stack diverges.
more » ... e stack diverges. Our quantitative predictions for are consistent with previous experimental measurements by Xu and co-workers.
doi:10.1039/b611064a pmid:32680207 fatcat:5u7sddhf5narbkkf6ahapthnja