Self-assembly of cylinder-forming diblock copolymer thin films

Arash Nikoubashman; Richard A. Register; Athanassios Z. Panagiotopoulos

doi:10.1021/ma400867s

Self-assembly of cylinder-forming diblock copolymer thin films

Arash Nikoubashman, Richard A. Register, Athanassios Z. Panagiotopoulos

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

We study the self-assembly of cylinder-forming diblock copolymers confined in ultrathin films by means of dissipative particle dynamics simulations paired with an elaborate polymer model that mimics the experimental reference system (PS-PHMA) as faithfully as computationally feasible. In particular, the effects of the polymer composition, film thickness, and surface interactions are investigated systematically, where we achieve quantitative agreement with experiments. We observe that the cylindrical domains change their orientation from perpendicular to parallel with respect to the substrate twice as the film thickness is increased. Furthermore, the onset thickness and the sharpness of this transition strongly depend on the microscopic details of the copolymers and their interaction with the substrate.

Original language	English (US)
Pages (from-to)	6651-6658
Number of pages	8
Journal	Macromolecules
Volume	46
Issue number	16
DOIs	https://doi.org/10.1021/ma400867s
State	Published - Aug 27 2013

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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10.1021/ma400867s

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AB - We study the self-assembly of cylinder-forming diblock copolymers confined in ultrathin films by means of dissipative particle dynamics simulations paired with an elaborate polymer model that mimics the experimental reference system (PS-PHMA) as faithfully as computationally feasible. In particular, the effects of the polymer composition, film thickness, and surface interactions are investigated systematically, where we achieve quantitative agreement with experiments. We observe that the cylindrical domains change their orientation from perpendicular to parallel with respect to the substrate twice as the film thickness is increased. Furthermore, the onset thickness and the sharpness of this transition strongly depend on the microscopic details of the copolymers and their interaction with the substrate.

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Self-assembly of cylinder-forming diblock copolymer thin films

Abstract

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