1. Micro-structure sensors based on ZnO microcrystals with contact-controlled ethanol sensing.
- Author
-
Liu Li, Zhang Tong, Li Shouchun, Wang Lianyuan, and Tian Yunxia
- Subjects
- *
MICROSTRUCTURE , *DETECTORS , *ZINC compounds , *ALCOHOL , *TRANSMISSION electron microscopy , *X-ray diffraction , *ELECTRODES - Abstract
ZnO microcrystals are synthesized through a facile solution method and characterized by field-emission scanning electron microscopy, transmission electron microscopy, selected area electron diffraction and X-ray diffraction. The ethanol sensing properties of these microcrystals are investigated by spin-coating them on a silicon substrate with Pt electrodes to fabricate a micro-structure sensor. The sensitivity is up to 8 when the sensor is exposed to 50 ppm ethanol, and the response time and recovery time are 10 s and 20 s, respectively. A contact-controlled model is established to explain the sensing properties of the microcrystals, which provides another approach to realize high-performance gas sensors. [ABSTRACT FROM AUTHOR]
- Published
- 2009
- Full Text
- View/download PDF