Fig. 2From: Directed self-assembly of a two-state block copolymer systemSEM images of ladder-shaped block copolymer patterns inside square confinement. a, c–h Show commensurate conditions while b shows transition between a one-state system (a) and a two-state system (c) inside incommensurate confinement dimensions. Width of the square confinement was a 2.2L0, b 2.8L0, c 3.0L0, d 4.1L0, e 5.1L0, f 6.1L0, g 7.1L0, and h 8.1L0 (L0 = 36 nm). Depending on the confinement width, 0–6 parallel bars were formed inside an outer ring. Scale bars, 200 nmBack to article page