Flexible Hall sensor made of laser-scribed graphene

Abstract Graphene has shown considerable potential for sensing magnetic fields based on the Hall Effect, due to its high carrier mobility, low sheet density, and low-temperature dependence. However, cost of graphene in comparison conventional materials meant that uptake electronic manufacturing been slow. To lower technological barriers bring more widespread adoption sensors, we are using a one-step laser scribing process does not rely multiple steps, toxic chemicals, subsequent treatments. Laser-scribed sensors offer linear response with normalized sensitivity ~1.12 V/AT. They also exhibit constant noise voltage floor ~ 50 nV/ $$\sqrt {{\mathrm{Hz}}}$$ Hz bias current 100 µA at room temperature, which is comparable state-of-the-art low-noise sensors. The combine bendability, come robustness operating temperatures up 400 °C. enable device ideas various areas, instance, soft robotics. As an example, combined laser-scribed sensor deformable elastomer flexible magnet realize low-cost, compliant, customizable tactile