Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 141, Issue 1, Pages 239-243Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2009.06.031
Keywords
Sonochemistry; Ambient conditions; High-sensitive sensor; Zinc oxide; Nanorod arrays
Funding
- Korea Research Institute of Standards and Science (KRISS)
- National Research Council of Science & Technology (NST), Republic of Korea [K09007] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A facile and fast sonochemical route for the fabrication of a resistive-type ZnO gas sensor has been demonstrated. Vertically aligned ZnO nanorod arrays were grown on a Pt-electrode patterned alumina substrate under ambient conditions. The average diameter and length of the ZnO nanorods were 50 and 500 nm, respectively. Sonochemically grown ZnO nanorod gas sensor was highly sensitive to NO2. gas with a very low detection limit of 10 ppb at 250 degrees C; further, its response and recovery time were short. Considering the advantageous properties of this sonochemical technique, we believe that it can be used to fabricate high-performance gas sensors. (C) 2009 Elsevier B.V. All rights reserved.
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