Tensile characterization of a stretchable LIG pulse wave sensor using a Kirigami structure

Abstract

This paper reports on the tensile characterization of a stretchable LIG (Laser-induced graphene) pulse wave sensor using a Kirigami structure. The pulse wave sensor’s stretchable characteristic is made by Kirigami structure. The stretchable sensor is fabricated by embedding the stretchable sensor element into silicone rubber. The sensor undergoes tensile testing to investigate its stretching characterization and response. The experimental results showed a linear relationship between the tensile force applied to the sensor and its stroke. The sensor can stretch up to 20%, meeting the design requirements. Also, it was confirmed that the sensor's response to elongation was linear up to 0.07 mm and become distorted beyond that point. From the linear region, the factional resistance change of the sensor was found to be ΔR/R = 11.09 m-1.