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Published on: January 30, 2020
Ultrasensitive Strain Sensor Produced by Direct Patterning of Liquid Crystals of Graphene Oxide on a Flexible
M Bulut Coskun1, Abozar Akbari2, Daniel T H Lai3
1Laboratory for Micro Systems, Department of Mechanical and Aerospace Engineering, Monash University , Melbourne 3800, Australia.
Abstract:
Ultrasensitive flexible strain sensors were developed through the combination of shear alignment of a high concentration graphene oxide (GO) dispersion with fast and precise patterning of multiple rectangular features on a flexible substrate. Resistive changes in the reduced GO films were investigated under various uniaxial strain cycles ranging from 0.025 to 2%, controlled with a motorized nanopositioning stage. The devices uniquely combine a very small detection limit (0.025%) and a high gauge factor with a rapid fabrication process conducive to batch production.
