WS.1 - Carbon Nanotube Based Flexible Gas Sensors Using Printing Techniques
- Event
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
Vienna, Austria - Chapter
- Wearable Sensors
- Author(s)
- J. Chen - School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta (USA), S. Mishra, W. Yeo, P. Hesketh, S. Kumar - G. W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta (USA)
- Pages
- 77 - 78
- DOI
- 10.5162/IMCS2018/WS.1
- ISBN
- 978-3-9816876-9-9
- Price
- free
Abstract
Carbon nanotube (CNT) based sensors have enormous potential in low concentration level gas detection because of its high sensitivity, fast response, and physical/chemical stability. However, device fabrication from conventional photolithography severely limit their applications when pursuing cost-effective production of flexible CNT gas sensors. In this context, printed electronic devices have attracted large interests which can provide significant design versatility and operational flexibility. Both aerosol jet and inkjet printing techniques have been used to fabricate fully printed CNT network gas sensors on flexible substrates such as polyimide (PI) and polyethylene terephthalate (PET), which have been used for ammonia and nitrogen dioxide detection in air at low ppm concentrations. To fit the corresponding sensor response, a double exponential-convolution model has been put forward. The time constants from this model are capable of capturing the different sensing phases during gas on and gas off states, which further help in deciphering the sensing mechanism. This work is of profound significance in air quality detection, pollution monitoring, and industrial emission control.