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Fabrication of highly sensitive and selective room-temperature nitrogen dioxide sensors based on the ZnO nanoflowers
Fabrication of highly sensitive and selective room-temperature nitrogen dioxide sensors based on the ZnO nanoflowers
- Source :
- Sensors and Actuators B: Chemical. 287:191-198
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- Herein, ZnO nanoflowers without any doping and modification were synthesized by hydrothermal method. The room temperature nitrogen dioxide sensor with high sensitivity, selectivity and long-term stability was prepared by combining ZnO nanoflowers with interdigital electrodes. The average diameter of the ZnO nanoflowers was about 0.9–1 μm. In addition, the gas sensing properties of the nitrogen dioxide gas sensors at room temperature were investigated. Compared with other ZnO sensors, the sensor based on the ZnO nanoflowers revealed outstanding sensing response to NO2, giving a response of 0.05–6 ppm. The sensor exhibited a lower detection limit of 0.05 ppm and had an ultra-high response to 1 ppm NO2 at room temperature. The response was only decreased by 16% of the initial value after 40 days of measurement. The Schottky barrier could be the key factor for the excellent NO2 sensing properties, which was formed between the Au electrodes and ZnO nanoflowers.
- Subjects :
- Detection limit
Materials science
Fabrication
Schottky barrier
Doping
Metals and Alloys
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Hydrothermal circulation
0104 chemical sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
chemistry.chemical_compound
chemistry
Chemical engineering
Electrode
Materials Chemistry
Nitrogen dioxide
Electrical and Electronic Engineering
0210 nano-technology
Selectivity
Instrumentation
Subjects
Details
- ISSN :
- 09254005
- Volume :
- 287
- Database :
- OpenAIRE
- Journal :
- Sensors and Actuators B: Chemical
- Accession number :
- edsair.doi...........12c7607a2cb7ca2cb2b9b8b550a3e78c
- Full Text :
- https://doi.org/10.1016/j.snb.2019.01.146