ZnO nanobelt based conductometric H2 and NO2 gas sensors

• Main Authors: Sadek A.Z., Wlodarski W., Kalantar-Zadeh K., Choopun S.
• Format: Conference or Workshop Item
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-33847245051&partnerID=40&md5=6bb9100241b6f432bfdd664e609a0bc7; http://cmuir.cmu.ac.th/handle/6653943832/4909
• Institution: Chiang Mai University

Conductometric H2 and NO2 gas sensors based on single-crystalline ZnO nanobelt sensitive layers have been developed. These layers were deposited using a rf magnetron sputterer. TEM and SEM characterization methods were employed to study the morphology of the nanobelts. These sensors were exposed to H2 and NO2 gases at operating temperatures between 225°C and 420°C. Study showed that sensors responded with highest magnitude at above 300°C. The fastest response and recovery times, with greater repeatability occurred at 385°C and 350°C for H2 and NO2 gases, respectively. Sensor with ZnO nanobelts has a much lower optimum operational temperature than that of conductometric sensors with other forms of ZnO crystal layers. © 2005 IEEE.