Fabrication of Screen-Printed Single-Electrode Triboelectric Nanogenerator-Based Self-Powered Sensor for Pulse Measurement and Its Characterization

The development of triboelectric nanogenerator technology has many benefits across various fields, particularly in healthcare applications; herein, a concise single-electrode pulse sensor with a high output performance at a reasonable cost is suggested. The device is made up of a polydimethylsiloxane film with a spacer-created trench structure stacked on top of a graphene-coated polyethylene terephthalate film. A comprehensive examination of sensor fabrication together with material and electrical characterization is explained. The entire study is carried out using a graphene-silver composite electrode device, giving an output performance of approximate to 1.66 and approximate to 2.9 V for tapping movement in plain and microstructured triboelectric surfaces, respectively; however, for the graphene electrode device, the output obtained is approximate to 5.5 V. This wearable sensor can successfully extract the typical human wrist pulse, which displays the pressure wave from the radial artery in the range of approximate to 5 V with the help of an exemplary amplifier circuit and will be suitable to integrate with IoT.