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Novel approach for observing the asymmetrical evolution and the compositional nonuniformity of laser pulsed atom probe tomography of a single ZnO nanowire

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Abstract

The characterization of ZnO nanowires is crucial for developing nanostructured devices together with related compounds and alloys with an atomic-scale regime. This study describes the effects of laser energy on the atom probe tomography analysis of a single ZnO nanowire with a high aspect ratio, diameters of 80?100 nm and lengths of 10 µm. We observed both an asymmetrical evolution in the apex morphology and the compositional nonuniformities of Zn and O ions with respect to the laser energies ranging from 5 to 40 nJ. When the higher laser illumination exposed to the ZnO nanowires, non-uniform field strength becomes noticeable especially at the laser incident side of the samples. Moreover, we measured the charge state ratios of Zn+ and Zn2+ ions as a function of the applied laser energies. Our results proved important for accurate quantitative characterization and better interpretation for the laser-pulsed atom probe tomography of ZnO-based devices.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang, 790-784, South Korea

    Jae-Bok Seol, Young-Tae Kim, Bo-Hwa Kim & Chan-Gyung Park

  2. National Institute for Nanomaterials Technology (NINT), Pohang University of Science and Technology, Pohang, 790-784, South Korea

    Jae-Bok Seol & Chan-Gyung Park

Authors
  1. Jae-Bok Seol
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  2. Young-Tae Kim
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  3. Bo-Hwa Kim
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  4. Chan-Gyung Park
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Corresponding authors

Correspondence to Bo-Hwa Kim or Chan-Gyung Park.

Additional information

Jae-Bok Seol and Young-Tae Kim contributed equally to this work.

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Seol, JB., Kim, YT., Kim, BH. et al. Novel approach for observing the asymmetrical evolution and the compositional nonuniformity of laser pulsed atom probe tomography of a single ZnO nanowire. Met. Mater. Int. 22, 34–40 (2016). https://doi.org/10.1007/s12540-015-5360-3

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  • DOI: https://doi.org/10.1007/s12540-015-5360-3

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