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Controllable growth of ZnO nanowires grown on discrete islands of Au catalyst for realization of planar-type micro gas sensors
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Microsystems Technology. (Mikrosystemteknik)
Hanoi University of Science and Technology. (International Training Institute for Materials Science)
Hanoi University of Science and Technology. (International Training Institute for Materials Science)
Hanoi Pedagogical University No 2, Vinhphuc, Viet Nam. (Faculty of Physics)
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2014 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, Vol. 193, 888-894 p.Article in journal (Refereed) Published
Abstract [en]

The proper engineering design of gas sensors and the controlled synthesis of sensing materials for the high-performance detection of toxic gas are very important in the fabrication of handheld devices. In this study, an effective design for gas sensor chips is developed to control the formation of grown ZnO nanowires (NWs).The design utilizes the dendrite islands of Au catalyst deposited on and between Pt electrodes of a planar-type micro gas sensor so that NWs can grow on instead of a continuous Au seed layer. This method results in an increase of NW-NW junctions on the device and also eliminates current leakage through the seed layer, which results in a higher sensitivity. The results show that the developed gas-sensing devices could be used to monitor NO2 at moderate temperature (~250 °C) and/or ethanol at a high temperature (~400 °C).

Place, publisher, year, edition, pages
2014. Vol. 193, 888-894 p.
Keyword [en]
ZnO nanowires, on-chip growth, MEMS, planar-type sensors
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Microsystems Technology; Engineering Science with specialization in Materials Science
URN: urn:nbn:se:uu:diva-210959DOI: 10.1016/j.snb.2013.11.043ISI: 000330113600124OAI: diva2:664917
17th International Conference on Solid-State Sensors, Actuators and Microsystems, Jun 16-20, 2013, Barcelona, Spain
Available from: 2013-11-18 Created: 2013-11-18 Last updated: 2014-03-06Bibliographically approved

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