Directed assembly of lamellae forming block copolymer thin films near the order-disorder transition.
basic_science · Level V
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- Record sourced from PubMed, PMID 24328810.
- Also identified by DOI 10.1021/nl403628d.
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Abstract
The impact of thin film confinement on the ordering of lamellae was investigated using symmetric poly(styrene-b-[isoprene-ran-epoxyisoprene]) diblock copolymers bound by nonpreferential wetting interfaces. The order-disorder transition temperature (TODT) and the occurrence of composition fluctuations in the disordered state are not significantly affected by two-dimensional confinement. Directed self-assembly using chemical patterning is demonstrated near TODT. These results establish the minimum feature size attainable using directed self-assembly of a given diblock copolymer system.