Enhanced field emission of ZnO nanoneedle arrays via solution etching at room temperature

Huanming Ma, Zhiwei Qin, Zaide Wang, Mashkoor Ahmad, Hongyu Sun

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    ZnO nanoneedle arrays (ZnO nns) were synthesized by a facile two-step solution-phase method based on the etching of pre-synthesized ZnO nanowire arrays (ZnO nws) with flat ends at room temperature. Field emission measurement results showed that the turn-on electronic fields of ZnO nns and nws were 2.7 and 5.3 V μm−1 at a current density of 10 μA cm−2, and the field enhancement factors were 4939.3 for ZnO nns and 1423.6 for ZnO nws. The enhanced field emission properties in ZnO nns were ascribed to the sharp tip geometry.
    Original languageEnglish
    JournalMaterials Letters
    Volume206
    Pages (from-to)162-165
    Number of pages4
    ISSN0167-577X
    DOIs
    Publication statusPublished - 2017

    Keywords

    • Crystal growth
    • Field emission
    • Solution method
    • ZnO nanoneedle arrays

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