Directional Roll-up of Nanomembranes Mediated by Wrinkling

Abstract

We investigate the relaxation of rectangular wrinkled thin films intrinsically containing an initial strain gradient. A preferential rolling direction, depending on wrinkle geometry and strain gradient, is theoretically predicted and experimentally verified. In contrast to typical rolled-up nanomembranes, which bend perpendicular to the longer edge of rectangular patterns, we find a regime where rolling parallel to the long edge of the wrinkled film is favorable. A non-uniform radius of the rolled-up film is well reproduced by elasticity theory and simulations of the film relaxation using a finite element method.

4 pages, 4 figures

References in corpus (3)

• Ripple Texturing of Suspended Graphene Atomic Membranes
• Effect of external conditions on the structure of scrolled graphene edges
• Electrostatic deposition of graphene in a gaseous environment: A deterministic route to synthesize rolled graphenes?

Cited by in corpus (4)

• Manipulating the shape of flexible magnetoelastic nanodiscs with meron-like magnetic states
• Mechanical Self-Assembly of a Strain-Engineered Flexible Layer: Wrinkling, Rolling, and Twisting
• Experimental realization of coexisting states of rolled-up and wrinkled nanomembranes by strain and etching control
• Stability of a Rolled-Up Conformation State for Two-Dimensional Materials in Aqueous Solutions