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Oxidation induced strain and defects in magnetite crystals

Author

Listed:
  • Ke Yuan

    (Chemical Sciences and Engineering Division, Argonne National Laboratory)

  • Sang Soo Lee

    (Chemical Sciences and Engineering Division, Argonne National Laboratory)

  • Wonsuk Cha

    (Advanced Photon Source, Argonne National Laboratory)

  • Andrew Ulvestad

    (Materials Science Division, Argonne National Laboratory)

  • Hyunjung Kim

    (Sogang University)

  • Bektur Abdilla

    (University of Delaware)

  • Neil C. Sturchio

    (University of Delaware)

  • Paul Fenter

    (Chemical Sciences and Engineering Division, Argonne National Laboratory)

Abstract

Oxidation of magnetite (Fe3O4) has broad implications in geochemistry, environmental science and materials science. Spatially resolving strain fields and defect evolution during oxidation of magnetite provides further insight into its reaction mechanisms. Here we show that the morphology and internal strain distributions within individual nano-sized (~400 nm) magnetite crystals can be visualized using Bragg coherent diffractive imaging (BCDI). Oxidative dissolution in acidic solutions leads to increases in the magnitude and heterogeneity of internal strains. This heterogeneous strain likely results from lattice distortion caused by Fe(II) diffusion that leads to the observed domains of increasing compressive and tensile strains. In contrast, strain evolution is less pronounced during magnetite oxidation at elevated temperature in air. These results demonstrate that oxidative dissolution of magnetite can induce a rich array of strain and defect structures, which could be an important factor that contributes to the high reactivity observed on magnetite particles in aqueous environment.

Suggested Citation

  • Ke Yuan & Sang Soo Lee & Wonsuk Cha & Andrew Ulvestad & Hyunjung Kim & Bektur Abdilla & Neil C. Sturchio & Paul Fenter, 2019. "Oxidation induced strain and defects in magnetite crystals," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-08470-0
    DOI: 10.1038/s41467-019-08470-0
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    Cited by:

    1. Sung Hyun Park & Sukyoung Kim & Jae Whan Park & Seunghee Kim & Wonsuk Cha & Joonseok Lee, 2024. "In-situ and wavelength-dependent photocatalytic strain evolution of a single Au nanoparticle on a TiO2 film," Nature Communications, Nature, vol. 15(1), pages 1-11, December.

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