ZnO nanocrystals with a high percentage of exposed {4 2-2-3-} reactive facets for enhanced gas sensing performance

Dawei Su, Haitao Fu, Xuchuan Jiang, Guoxiu Wang

Research output: Contribution to journalArticleResearchpeer-review

16 Citations (Scopus)

Abstract

Zinc oxide single crystals with a high percentage of exposed 4 2-2-3- reactive facet were prepared by a facile hydrothermal route. X-ray diffraction, field emission scanning electron microscopy, and high resolution transmission microscopy confirmed the faceted single crystal structure. Through the density functional theory (DFT) calculations, it is validated that the 4 2-2-3- surface of ZnO crystals has high surface energy. When used as a sensing material in gas sensors, ZnO crystals with dominating exposed 4 2-2-3- planes exhibited a superior sensitivity toward toxic and flammable gases.
Original languageEnglish
Pages (from-to)286 - 292
Number of pages7
JournalSensors and Actuators B: Chemical
Volume186
DOIs
Publication statusPublished - 2013
Externally publishedYes

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