Patterning Oxide Nanopillars at the Atomic Scale by Phase Transformation

Chunlin Chen, Zhongchang Wang, Frank Lichtenberg, Yuichi Ikuhara, Johannes Georg Bednorz

    Research output: Contribution to journalArticlepeer-review

    11 Citations (Scopus)

    Abstract

    Phase transformations in crystalline materials are common in nature and often modify dramatically properties of materials. The ability to precisely control them with a high spatial precision represents a significant step forward in realizing new functionalities in confined dimensions. However, such control is extremely challenging particularly at the atomic scale due to the intricacies in governing thermodynamic conditions with a high spatial accuracy. Here, we apply focused electron beam of a scanning transmission electron microscope to irradiate SrNbO3.4 crystals and demonstrate a precise control of a phase transformation from layered SrNbO3.4 to perovskite SrNbO3 at the atomic scale. By purposely squeezing O atoms out of the vertex-sharing NbO6 octahedral slabs, their neighboring slabs zip together, resulting in a patterning of SrNbO3 nanopillars in SrNbO3.4 matrix. Such phase transformations can be spatially manipulated with an atomic precision, opening up a novel avenue for materials design and processing and also for advanced nanodevice fabrication.

    Original languageEnglish
    Pages (from-to)6469-6474
    Number of pages6
    JournalNano Letters
    Volume15
    Issue number10
    DOIs
    Publication statusPublished - 2015 Oct 14

    Keywords

    • SrNbO
    • nanopillars
    • phase transformation
    • transmission electron microscopy

    ASJC Scopus subject areas

    • Bioengineering
    • Chemistry(all)
    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanical Engineering

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