Improving lifetime and output current of organic-based gas sensor for applications in breath detection
Journal
Digest of Technical Papers - SID International Symposium
Journal Volume
50
Journal Issue
S1
Date Issued
2019-01-01
Author(s)
Abstract
We exploited the stability of Donor-Acceptor polymer on the cylindrical nanopores structure to realize the sensors with a high sensitivity and stability. Then, we propose a double active layer (DL) strategy that exploits an ultra-thin layer of Poly(3hexylthiophene-2,5-diyl) (P3HT) to serve as a work function buffer to enhance the operational current. The DL sensor exhibits a sustainable enhanced operational current of microampere level and a stable sensing response even with the presence of P3HT layer. This effect is carefully examined with different aspects, including vertical composition profile of DL configuration, lifetime testing on different sensing layer, morphological analysis, and the versatility of the DL strategy. Finally, we utilize the DL sensor to conduct a tracing of BA concentration in two HD patients before and after HD, and correlate it with the blood urea nitrogen (BUN) levels. A good correlation coefficient of 0.96 is achieved.
Subjects
Ammonia sensor | Breath sensor | Donoracceptor | Hemodialysis | Organic gas sensor
SDGs
Type
conference paper