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Directed self-assembly of a two-state block copolymer system
Do Hyung Wan,Choi Hong Kyoon,Gadelrab Karim R.,Chang Jae-Byum,Alexander-Katz Alfredo,Ross Caroline A.,Berggren Karl K. 나노기술연구협의회 2018 Nano Convergence Vol.5 No.25
In this work, ladder-shaped block copolymer structures consisting of parallel bars, bends, and T-junctions are formed inside square confinement. We define binary states by the two degenerate alignment orientations, and study properties of the two-state system. We control the binary states by creating openings around the confinement, changing the confinement geometry, or placing lithographic guiding patterns inside the confinement. Self-consistent field theory simulations show templating effect from the wall openings and reproduce the experimental results. We demonstrate scaling of a single binary state into a larger binary state array with individual binary state control.