Abstract

Coexisting micro-/nanostructures on a stretchable substrate offer localized functionality with programmability and dynamic regulation. Yet, the combination of different fabrication techniques is challenging. In this paper, a one-step methodology for such a surface is proposed by harnessing wrinkle instability at the targeted area with selected mechanical constraint during soft lithography. Partly covered by patterned constraints, a surface with nanostructures that replicate a template is obtained while the unconstraint part wrinkles as a result of classical morphology instability. The effect of constraints is investigated experimentally to guide the generation of two optical performances, chemical color and structural color, at the coexisting surface structures. A camouflage demonstration is illustrated, utilizing the strict consequence of wrinkle-flattening and structural color redshift upon stretching.

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