1-s2.0-S235243161500022X-gr3_lrg

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The basic mechanism of hexagonal pattern formation in the 2 μm-thick elastic–plastic composite film. Top-view HRSEM image of an opening in the composite thin film.

The basic mechanism of hexagonal pattern formation in the 2 μm-thick elastic–plastic composite film. Top-view HRSEM image of an opening in the composite thin film.