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Single-crystal zinc oxide nanorods with nanovoids as highly sensitive NO2 nanosensors
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Microsystems Technology.
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2013 (English)In: Materials letters (General ed.), ISSN 0167-577X, E-ISSN 1873-4979, Vol. 94, 41-43 p.Article in journal (Refereed) Published
Abstract [en]

Design and synthesis of nanostructured materials with a highly porous crystal structure and high specific surface area are the key issues to an enhanced gas sensing performance. This letter introduces a simple and scalable hydrothermal method to fabricate single-crystal ZnO nanorods (NRs) with nanovoids (NVs) for highly sensitive NO2 nanosensors. The fabricated ZnO NRs have a single-crystal structure with an average length and diameter of about 900 nm and 23 nm, respectively. NVs of less than 5 nm size are found frequently along the NRs. Gas-sensing characterizations revealed that the ZnO NR sensors exhibited a relatively high response to sub-ppm NO2 with excellent stability after 8 cycles of switching from NO2 to dry air without significant response reduction.

Place, publisher, year, edition, pages
2013. Vol. 94, 41-43 p.
Keyword [en]
Nanosensors, NO2, NVs, ZnO NRs
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Microsystems Technology
URN: urn:nbn:se:uu:diva-194988DOI: 10.1016/j.matlet.2012.12.006OAI: oai:DiVA.org:uu-194988DiVA: diva2:606997
Available from: 2013-02-21 Created: 2013-02-20 Last updated: 2014-01-15Bibliographically approved

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