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http://dx.doi.org/10.5369/JSST.2012.21.6.446

The Characteristics of ZnO/SnO2 Sensing Materials by Ultrasonic and Hydrothermal Treatments to Volatile Organic Compounds  

Yu, Joon-Boo (Dept. of Materials Science and Metallurgical Engineering, Kyungpook National University)
Do, Seung-Hoon (Dept. of Materials Science and Metallurgical Engineering, Kyungpook National University)
Byun, Hyung-Gi (Department of Electronic, Information & Communication Engineering, Kangwon National University)
Huh, Jeung-Soo (Dept. of Materials Science and Metallurgical Engineering, Kyungpook National University)
Publication Information
Journal of Sensor Science and Technology / v.21, no.6, 2012 , pp. 446-450 More about this Journal
Abstract
The important factors in sensors are sensitivity, selectivity, and response time. Oxide semiconductors are high sensitivity, fast response and the advantage of miniaturization. Zn-doped $SnO_2$ materials have been synthesized in order to improve the selectivity of the sensor. ZnO/$SnO_2$ crystals were prepared by a simple hydrothermal process and ultrasound pretreated hydrothermal process. ZnO/$SnO_2$ urchins were fabricated in the precursor solution with [$Zn^{2+}$]:[$Sn^{4+}$] ratio of 1:5 and rod structures were fabricated ratio of 1:1 and 1:3. Surface area ratio was increased by increasing the ratio of [$Sn^{4+}$]. The sensitivity of sensors were highest at the [$Zn^{2+}$]:[$Sn^{4+}$] ratio of 1:5 in ethanol, acetaldehyde, toluene, and nitric oxide.
Keywords
ZnO-$SnO_2$; Hydrothermal; Ultrasonic; VOC;
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Times Cited By KSCI : 2  (Citation Analysis)
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