Tunable and wearable high performance strain sensors based on laser patterned graphene flakes

Tunable and wearable strain sensors with high gauge factor (GF) and large strain range based on laser patterned graphene flakes (LPGF) are demonstrated in this paper. The performance can be adjusted by laser patterning, resulting in a preferable GF (up to 457) or strain range (over 100%), both of which are significantly higher than most of the state-of-the-art graphene strain sensors. Most importantly, the tunable strain sensors with high GF and large strain range can be fabricated simultaneously by a one-step laser patterning. These tunable strain sensors can meet the demands of monitoring both subtle and large human motions, indicating that they will have great potentials in health care, voice recognition, gesture control and many other areas.