Influence of Interfacial Energy on Electric-Field-Induced Sphere-to-Cylinder Transition in Block Copolymer Thin Films

Wang, Jia-Yu and Chen, Wei and Russell, Thomas P.. (2008) Influence of Interfacial Energy on Electric-Field-Induced Sphere-to-Cylinder Transition in Block Copolymer Thin Films. Macromolecules, 41 (19). pp. 7227-7231. ISSN 0024-9297

Full text not available from this repository. (Request a copy)

Abstract

The effect of the interfacial energy on the electric-field-induced sphere-to-cylinder (S-to-C) transition in polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA) copolymer thin films was studied as a function of the difference in the interfacial interactions of the PS and PMMA blocks with the substrate, δ. It was found that the interfacial energies altered both the critical electric field strength and the time scales of kinetics. A very strong preferential interfacial interaction suppressed the electric-field-induced S-to-C transition even though such a transition occurred on a neutralized surface where the interfacial interactions were balanced. For a moderate interfacial interaction, the S-to-C transition can be induced by an applied electric field, but the time scale of the morphology change is much longer. Furthermore, the formation of ionic complexes in the BCP was found to enhance the electric-field-induced S-to-C transition even on a native Si substrate without any surface modification, providing a simple route to generate ordered arrays of high-aspect-ratio cylinders oriented normal to a film surface.

Item Type: Article
Additional Information: Reprinted with permission from "Influence of Interfacial Energy on Electric-Field-Induced Sphere-to-Cylinder Transition in Block Copolymer Thin Films", T Russell et al., Macromolecules, 41(9) pg 7227 - 7231. Copyright 2008 American Chemical Society.
InterNano Taxonomy: Nanoscale Objects and Nanostructured Materials > Nanostructured Materials > Block copolymers
Nanomanufacturing Processes > Assembly Techniques > Shape based assembly
Nanoscale Objects and Nanostructured Materials > Nanocomposites > Thin films
Environment, Health, and Safety
Collections: Nanomanufacturing Research Collection > Nanomanufacturing Nanoscale Science and Engineering Centers > Center for Hierarchical Manufacturing
Nanomanufacturing Research Collection
Depositing User: Moureen Kemei
Date Deposited: 17 Feb 2010 19:51
Last Modified: 19 Sep 2011 21:24
URI: http://eprints.internano.org/id/eprint/284

Actions (login required)

View Item View Item