Super-Elastic Graphene Ripples for Flexible Strain Sensors

Abstract

In this study, we report a buckling approach for graphene and graphene ribbons on stretchable elastomeric substrates. Stretched polydimethylsiloxane (PDMS) films with different prestrains were used to receive the transferred graphene, and nanoscale periodical buckling of graphene was spontaneously formed after strain release. The morphology and periodicity of the as-formed graphene ripples are dependent strongly on their original shapes and substrates' prestrains. Regular periodicity of the ripples preferred to form for narrow graphene ribbons, and both the amplitude and periodicity are reduced with the increase of prestrain on PDMS. The graphene ripples have the ability to afford large strain deformation, thus making it ideal for flexible electronic applications. It was demonstrated that both graphene ribbon and nanographene film ripples could be used for strain sensors, and their resistance changes upon different strains were studied. This simple and controllable process of buckled graphene provides a feasible fabrication for graphene flexible electronic devices and strain sensors due to its novel mechanical and electrical properties.

Controllable Synthesis of Graphene by Plasma‐Enhanced Chemical Vapor Deposition and Its Related Applications

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Stretchable organic memory: toward learnable and digitized stretchable electronic applications

“…Previously, elastic, wrinkled graphene has shown promise for use in different applications, such as in strain sensing and field emission. 33,34 Recently, using a novel method to control the crumpling and unfolding of a large area of graphene with polymer laminates has also been reported for artificial-muscle actuators. 35 Taking the advantages of graphene and the mechanical flexibility of the organic material may open up a path for stretchable devices.…”

Extremely Stretchable Strain Sensors Based on Conductive Self‐Healing Dynamic Cross‐Links Hydrogels for Human‐Motion Detection

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