P1FW.5 - A Fully Printed CNT Based Humidity Sensor on Flexible PET Substrate
- Event
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
Vienna, Austria - Chapter
- P-1 - Flexible, Stretchable and Wearable Sensors
- Author(s)
- V. Turkani, B. Narakathu, D. Maddipatla, B. Bazuin, M. Atashbar - Department of Electrical and Computer Engineering, Western Michigan University, Kalamazoo, Michigan (USA)
- Pages
- 519 - 520
- DOI
- 10.5162/IMCS2018/P1FW.5
- ISBN
- 978-3-9816876-9-9
- Price
- free
Abstract
A fully printed carbon nanotube (CNT) based humidity sensor was developed for humidity sensing applications. The multi-layer humidity sensor was fabricated using additive print manufacturing processes on a flexible polyethylene terephthalate (PET) substrate. Two silver (Ag) electrodes were deposited using screen printing process. Gravure printing process was used to deposit a carbon nanotube (CNT) sensing layer between the Ag electrodes. The performance of the fabricated sensor was investigated by measuring its response towards varying relative humidity (% RH) ranging from 20% RH to 80% RH, in steps of 10% RH. The resistive response of the humidity sensor exhibited a linear response over the entire operational RH range resulting in an overall resistance change of 6%. In addition, a sensitivity of 0.1% / %RH and a correlation coefficient 0.9484 were calculated for the printed humidity sensor.