Fig. 4: BCP state-space complexity impacts pathway convergence.
From: Priming self-assembly pathways by stacking block copolymers

SEM images (top-down and cross-section) of same-component and bi-component BCP bilayers compared to their single-layer analogs (annealed at 250 °C for 1200 s). Different evolution behaviors can be observed (denoted by color of outline box): some pathways converge together into a common final morphology (black), while other pathways lead to variants of a particular motif (green). Some self-assembly pathways become kinetically trapped in metastable states (red). Scale bars are 100 nm.