Fabrication of Flexible Triboelectric Nanogenerator base of TiO2 nanotube Arrays as Self-powered Humidity Sensor
Paper ID : 1212-ICNS
Elham Farahani *1, Raheleh Mohammadpour2
1Department of Physics, Sharif University of Technology, Teheran 14588-89694, Iran
2Sharif University of Technology
Here in this research, a stable and flexible titanium oxide electrodes has been fabricated through anodization method and utilized as the triboelectric nanogenerator (TENG) in combination with Kapton electrodes. By examining the TENG performance under different frequencies, the maximum voltage and current more than 300 V and 40 A respectively with maximum power of 1.25 ± 0.67 mW has been achieved at 4Hz. The fabricated TENG has been employed as the self-powered humidity sensor. Because of its hydrophilic features, TiO2 absorbs the water molecules with increasing moisture, and the charge transfer decreases between the two triboelectric materials as the surface charge transfer depends on the adsorbent molecules. The TiO2-based TENG sensor was exposed to different relative humidity (RH) and the results showed that by increasing the humidity the output voltage and output current decreased from 162.24 ± 35.99 V and 20.4 ± 4.93 μA at RH = 20% to 37.92 ± 1.54 V at RH = 79% and 40.87 88 6.88 ± 1.7 μA at RH = 84%, respectively, Which shows the responsivity more than 300%. This method of measuring humidity has a simple and cost-effective fabrication that has various applications in many fields such as industry and medicine.
TiO2; Humidity sensor; Self-powered; Nanogenerator
Status : Abstract Accepted (Poster Presentation)