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Strong stretching theory for diblock copolymers in thin films
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10.1063/1.3027437
/content/aip/journal/jcp/129/21/10.1063/1.3027437
http://aip.metastore.ingenta.com/content/aip/journal/jcp/129/21/10.1063/1.3027437
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

A thin film with two rows of hexagons in it. The deformation of the hexagons is quantified by the parameter , and the side length of the hexagon is . The length of the half-axis can be varied such that cylinders flatten. Left: pure cylindrical structure, where the hexagons at the walls have more volume than the hexagons at the center of the film. The slope is varied in order to allow the cylinders to become flat. Right: mixed structure with lamellas at the walls and cylinders at the center of the film. The lamellas at the walls can be undulated, and the amplitude can be modified.

Image of FIG. 2.
FIG. 2.

Free energy of different morphologies as a function of the film thickness for a diblock copolymer with and and walls’ affinities of . The free energy of the perpendicularly oriented cylinders and the parallely oriented lamellas are calculated analytically, while the free energy for mixed structures and parallely oriented cylinders are calculated numerically. The walls’ affinities of are also included in the analytical formulas for and . The parabolas with identical symbols are for a different number of hexagons in the film.

Image of FIG. 3.
FIG. 3.

Phase diagrams for a diblock copolymer with (top), (middle), and (bottom), and in a thin film with two identical walls. The pure cylindrical phase is labeled by , where represents the number of cylindrical rows lying at the center of the film. The mixed phase with lamellas at the walls and cylinders at the center of the film is marked by , where represent different numbers of cylinders at the center of the film. The perpendicularly oriented cylinders are denoted by .

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/content/aip/journal/jcp/129/21/10.1063/1.3027437
2008-12-04
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Strong stretching theory for diblock copolymers in thin films
http://aip.metastore.ingenta.com/content/aip/journal/jcp/129/21/10.1063/1.3027437
10.1063/1.3027437
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