Poly-Crystalline MoS2 Thin Film Based Low Cost Flexible Sensors

The present study investigates the piezoresistive property of poly-crystalline MoS
2
thin film for strain sensing applications. The gauge factor (GF) of flexible MoS
2
device (MoS
2
/PET) has been calculated for the applied strain up to 15%. Herein, we have reported a cost-effective and scalable approach to fabricate large-area poly-crystalline MoS
2
thin film based flexible sensors for a wider strain range. The liquid-phase exfoliated approach of poly-crystalline MoS
2
film synthesis benefits to fabricate large scale economical and reliable flexible sensor with the fast response and high durability. We have observed an excellent piezoresistivity response for this polycrystalline MoS
2
film based sensor with a GF of about
$100\pm 7$
. Further, we have demonstrated the durability test of the fabricated sensors with body movements such as hand gestures and knee movements for the fabricated strain sensors.