Abstract
We successfully demonstrated a simple and low-cost nitric oxide (NO) gas sensor to deliver parts-per-billion (ppb) regime detection at room temperature operation. A vertical-channel ZnO nanorods resistor is fabricated by putting silver nanowire electrode onto the hydrothermal ZnO nanorods film. With suitable process condition, the nanorods film exhibits a uniform morphology to enable the formation of gas-permeable nanowire top electrode while also the nanorods provide good surface-to-volume ratio to deliver strong reaction with NO gas. A detection limit to 10 ppb NO is observed while the sensing dynamic range from 10 ppb to 100 ppb is obtained. The sensor is reversible and the real-time sensing response is within 30 s. The results benefit the NO breath detection for patients with chronic inflammatory airway disease, such as asthma.
| Original language | English |
|---|---|
| Article number | 095501 |
| Pages (from-to) | 1-7 |
| Number of pages | 7 |
| Journal | Nanotechnology |
| Volume | 30 |
| Issue number | 9 |
| DOIs | |
| State | Published - Jan 2019 |
Keywords
- ZnO
- gas sensor
- metal oxide semiconductor
- nanorods thin film
- nitric oxide
- vertical channel