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Electric field versus surface alignment in confined films of a diblock copolymer melt
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10.1063/1.2360947
/content/aip/journal/jcp/125/16/10.1063/1.2360947
http://aip.metastore.ingenta.com/content/aip/journal/jcp/125/16/10.1063/1.2360947
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Isosurface representation of a symmetric diblock copolymer melt for and the projection of the 3D structure factor at different dimensionless times . The surface related interaction parameter is , corresponding to the adsorption energy per statistical unit.

Image of FIG. 2.
FIG. 2.

The part of the total free energy of a diblock copolymer as a function of time for the surface related interaction parameter .

Image of FIG. 3.
FIG. 3.

The enlarged part of the two-cluster morphology shown in Fig. 1(e) containing the region of cluster dividing surface (the position ranges between and ). The region exhibits a doubly periodic array of saddle surfaces.

Image of FIG. 4.
FIG. 4.

The morphology scans through the region of cluster dividing surface in the same ranges, as shown in Fig. 3. The morphologies shown are orthoslices of two-cluster morphology from Fig. 1(e) at different positions. The regions containing more blocks are colored black with linear gray scale of the density from 0.0 (black) to 1.0 (white).

Image of FIG. 5.
FIG. 5.

Evolution of the orientational order parameter corresponding to the morphological transformations shown in Fig. 1. The surface related interaction parameter is .

Image of FIG. 6.
FIG. 6.

The time evolution of stresses in the morphology due to domains (curve 1), (curve 2), and (curve 3).

Image of FIG. 7.
FIG. 7.

An intermediate structure of two coexisting lamellae clusters of parallel to the electric field lamellae and the final morphology for the surface related interaction parameters (a) , (b) 0.7, and (c) 0.8. The -axis projections in the direction of the applied electric field of the morphologies are shown.

Image of FIG. 8.
FIG. 8.

Isosurface representation of an diblock copolymer melt for and the projections of the lamellar morphology for the surface related interaction parameter , corresponding to the adsorption energy per statistical unit.

Image of FIG. 9.
FIG. 9.

Time evolution of the orientational order parameter in the presence (solid line) and in the absence (dashed line) of an external electric field. The surface related interaction parameter is the same for both cases.

Image of FIG. 10.
FIG. 10.

Time evolution of stresses in the subjected to the electric field sample, , due to domain transformations: (curve 1), (curve 2), and (curve 3). The transformations in stresses are related to morphological evolution shown in Fig. 8.

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/content/aip/journal/jcp/125/16/10.1063/1.2360947
2006-10-30
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Electric field versus surface alignment in confined films of a diblock copolymer melt
http://aip.metastore.ingenta.com/content/aip/journal/jcp/125/16/10.1063/1.2360947
10.1063/1.2360947
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