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In situ analysis of catalyst composition during gold catalyzed GaAs nanowire growth

Author

Listed:
  • Carina B. Maliakkal

    (NanoLund, Lund University
    Solid State Physics, Lund University, Box 118)

  • Daniel Jacobsson

    (NanoLund, Lund University
    National Center for High Resolution Electron Microscopy and Centre for Analysis and Synthesis, Lund University, Box 124)

  • Marcus Tornberg

    (NanoLund, Lund University
    Solid State Physics, Lund University, Box 118)

  • Axel R. Persson

    (NanoLund, Lund University
    National Center for High Resolution Electron Microscopy and Centre for Analysis and Synthesis, Lund University, Box 124)

  • Jonas Johansson

    (NanoLund, Lund University
    Solid State Physics, Lund University, Box 118)

  • Reine Wallenberg

    (NanoLund, Lund University
    National Center for High Resolution Electron Microscopy and Centre for Analysis and Synthesis, Lund University, Box 124)

  • Kimberly A. Dick

    (NanoLund, Lund University
    Solid State Physics, Lund University, Box 118
    National Center for High Resolution Electron Microscopy and Centre for Analysis and Synthesis, Lund University, Box 124)

Abstract

Semiconductor nanowires offer the opportunity to incorporate novel structures and functionality into electronic and optoelectronic devices. A clear understanding of the nanowire growth mechanism is essential for well-controlled growth of structures with desired properties, but the understanding is currently limited by a lack of empirical measurements of important parameters during growth, such as catalyst particle composition. However, this is difficult to accurately determine by investigating post-growth. We report direct in situ measurement of the catalyst composition during nanowire growth for the first time. We study Au-seeded GaAs nanowires inside an electron microscope as they grow and measure the catalyst composition using X-ray energy dispersive spectroscopy. The Ga content in the catalyst during growth increases with both temperature and Ga precursor flux.

Suggested Citation

  • Carina B. Maliakkal & Daniel Jacobsson & Marcus Tornberg & Axel R. Persson & Jonas Johansson & Reine Wallenberg & Kimberly A. Dick, 2019. "In situ analysis of catalyst composition during gold catalyzed GaAs nanowire growth," Nature Communications, Nature, vol. 10(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-12437-6
    DOI: 10.1038/s41467-019-12437-6
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