Highly Stretchable and Ultrasensitive Strain Sensor\nBased on Reduced Graphene Oxide Microtubes–Elastomer Composite

Abstract

Strain\nsensors with excellent flexibility, stretchability, and sensitivity\nhave attracted increasing interests. In this paper, a highly stretchable\nand ultrasensitive strain sensor based on reduced graphene oxide microtubes–elastomer\nis fabricated by a template induced assembly and followed a polymer\ncoating process. The sensors can be stretched in excess of 50% of\nits original length, showing long-term durability and excellent selectivity\nto a specific strain under various disturbances. The sensitivity of\nthis sensor is as high as 630 of gauge factor under 21.3% applied\nstrain; more importantly, it can be easily modulated to accommodate\ndiverse requirements. Implementation of the device for gauging muscle-induced\nstrain in several biological systems shows reproducibility and different\nresponses in the form of resistance or current change. The developed\nstrain sensors show great application potential in fields of biomechanical\nsystems, communications, and other related areas.