GS1.3 - Pyramid-Shaped ZnO Particles with High Sensitivity to Ethanol Gas
- Event
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
Vienna, Austria - Chapter
- Gas Sensors 1 - Fundamentals
- Author(s)
- N. Saito, H. Haneda, I. Sakaguchi - National Institute for Materials Science, Tsukuba (Japan), K. Suematsu, K. Watanabe, K. Shimanoe - Kyushu University, Kasuga (Japan)
- Pages
- 66 - 67
- DOI
- 10.5162/IMCS2018/GS1.3
- ISBN
- 978-3-9816876-9-9
- Price
- free
Abstract
We report the fabrication of ZnO pyramid-shaped particles with remarkably high sensitivity to ethanol gas. The ZnO pyramid shaped particles were synthesized solvothermally under agitation in ethylene glycol and water solvent. The agitation resulted in dispersion of the pyramid-shaped particles rather than spherical aggregates. TEM studies revealed that the base of the pyramid-shaped particles is the (0001) plane and the six side surfaces are the {10-1-1} plane. Gas sensing response was evaluated as the ratio of electrical resistance of the ZnO particulate layer in air to that in ethanol. The highest gas sensing response value to 50 ppm ethanol gas was about 10000, which is remarkably higher than that of previously reported ZnO particles. The influence of the crystal facets and the polarity is discussed.