Wearable Graphene Sensor for Pulse Measurement

Vićentić, Teodora; Rašljić Rafajilović, Milena; Koteska, Bojana; Madevska Bogdanova, Ana; Pašti, Igor; Spasenović, Marko

Wearable Graphene Sensor for Pulse Measurement

Date Issued

2021

Author(s)

Vićentić, Teodora

Rašljić Rafajilović, Milena

Madevska Bogdanova, Ana

Pašti, Igor

Spasenović, Marko

Abstract

Graphene is a material that has been widely used in different types of sensors, due to its optimal electrical and mechanical properties. Recently discovered laser-induced graphene (LIG) has opened new perspectives for a versatile and durable physical sensing platform, capable of detecting various physical parameters. In this study, LIG was produced by CO2 laser irradiation of polyimide film. LIG-based sensor was used to measure human pulse. Fabricated LIG sensors were attached to a subject’s body. A temporal change in resistance was recorded for different sensor embodiments, including as-fabricated on polyimide tape and transferred into a PDMS matrix. The measured change in resistance is induced by bending of the sensor due to vein pulsing. The measured resistance time traces were analyzed with the Python HeartPy module to extract pulse information, demonstrating agreement with commercially available sensors.