Printed graphene sensors for pressure-sensing applications: Progress and future perspectives

Abstract

The paper presents a topical review of the work done on graphene-based flexible pressure sensors. Graphene and its derivatives have played a pivotal role in the development of flexible thin-film prototypes for strain- and pressure-sensitive applications. The exceptional electrical and mechanical characteristics of graphene have allowed it to be employed both as a pure material and within composites to fabricate enhanced pressure-sensing materials. Certain printing processes, including screen printing, inkjet printing, 3D printing and laser ablation, have enabled the production of efficient sensors on diverse polymeric and textile substrates. The low product cost, high flexibility and easy customisation have made these processes well-suited for large-scale development of pressure sensing devices. The sensors developed using these techniques have been successfully used for flexible wearable electronics, tactile interfaces and other industrial applications. The review emphasises key advances in printed graphene-based pressure sensors and discusses the opportunities to further enhance their performance.