Abstract
In this work, we present a high-performance smart electronic nose (E-nose) system consisting of a multiplexed tin oxide (SnO2) nanotube sensor array, read-out circuit, wireless data transmission unit, mobile phone receiver, and data processing application (App). Using the designed nanotube sensor device structure in conjunction with multiple electrode materials, high-sensitivity gas detection and discrimination have been achieved at room temperature, enabling a 1000 times reduction of the sensor's power consumption as compared to a conventional device using thin film SnO2. The experimental results demonstrate that the developed E-nose can identify indoor target gases using a simple vector-matching gas recognition algorithm. In addition, the fabricated E-nose has achieved state-of-the-art sensitivity for H2 and benzene detection at room temperature with metal oxide sensors. Such a smart E-nose system can address the imperative needs for distributed environmental monitoring in smart homes, smart buildings, and smart cities.
Original language | English |
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Pages (from-to) | 6079-6088 |
Number of pages | 10 |
Journal | ACS Nano |
Volume | 12 |
Issue number | 6 |
DOIs | |
Publication status | Published - 26 Jun 2018 |
Keywords
- distributed sensor system
- electronic nose
- gas recognition
- low-power gas sensor
- tin oxide nanotube