Gas-sensing property improvement of ZnO by hierarchical flower-like architectures

Weiwei Guo, Tianmo Liu, Wen Zeng, Dejun Liu, Yong Chen, Zhongchang Wang

    Research output: Contribution to journalArticlepeer-review

    57 Citations (Scopus)


    New morphologies often play a critical role in governing properties of nano-materials. Here, using hydrothermal method and reagents of sodium citrate and polyethylene glycol (PEG), we synthesize the ZnO nano-crystals and find that they exhibit hierarchical flower-like architectures assembled by nanosheets. Further comparative studies demonstrate that the sodium citrate assists a uniform growth of the nanosheets, and the PEG provides nucleation sites for the assembling of the nanosheets, both of which play a critical role in producing such unique flower-like architectures. Consequently, this sample is found to show excellent sensing performances to the target ethanol owing to its largest amount of petals, intervals, and pores. Such an unexpected morphology holds substantial promise for rendering ZnO as a potential gas-sensing material for a broad range of future sensor applications.

    Original languageEnglish
    Pages (from-to)3384-3387
    Number of pages4
    JournalMaterials Letters
    Issue number23-24
    Publication statusPublished - 2011 Dec


    • Ceramics
    • Crystal growth
    • Functional
    • Microstructure

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanical Engineering
    • Mechanics of Materials


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