DOI: 10.1063/1.2130890. Void formation during early stages of passivation: Initial oxidation of iron nanoparticles at room temperature

Void formation during early stages of passivation: Initial oxidation of iron nanoparticles at room temperature

10.1063/1.2130890

Crossref journal-article

AIP Publishing

Journal of Applied Physics (317)

Abstract

The examination of nanoparticles allows study of some processes and mechanisms that are not as easily observed for films or other types of studies in which sample preparation artifacts have been the cause of some uncertainties. Microstructure of iron nanoparticles passivated with iron oxide shell was studied using high-resolution transmission electron microscopy and high-angle annular dark-field imaging in aberration-corrected scanning transmission electron microscopy. Voids were readily observed on both small single-crystal α-Fe nanoparticles formed in a sputtering process and the more complex particles created by reduction of an oxide by hydrogen. Although the formation of hollow spheres of nanoparticles has been engineered for Co at higher temperatures [Y. Yin, R. M. Riou, C. K. Erdonmez, S. Hughes, G. A. Somorjari, and A. P. Alivisatos, Science 304, 711 (2004)], they occur for iron at room temperature and provide insight into the initial oxidation processes of iron. There exists a critical size of ∼8nm for which the iron has been fully oxidized, leading to a hollow iron-oxide nanoparticle. For particles larger than the critical size, an iron/iron-oxide core-shell structure was formed and voids reside at the interface between the oxide shell and the iron core. The present observation provides new insight for tailoring of metal/metal-oxide core-shell structured nanoparticles for applications related to optics, magnetism, and nanoelectronics.

Bibliography

Wang, C. M., Baer, D. R., Thomas, L. E., Amonette, J. E., Antony, J., Qiang, Y., & Duscher, G. (2005). Void formation during early stages of passivation: Initial oxidation of iron nanoparticles at room temperature. Journal of Applied Physics, 98(9).

Authors 7

C. M. Wang (first)
D. R. Baer (additional)
L. E. Thomas (additional)
J. E. Amonette (additional)
Jiji Antony (additional)
You Qiang (additional)
G. Duscher (additional)

References 42 Referenced 243

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Dates

Type	When
Created	19 years, 9 months ago (Nov. 7, 2005, 6:09 p.m.)
Deposited	2 years ago (Aug. 1, 2023, 2:09 a.m.)
Indexed	15 hours, 55 minutes ago (Aug. 27, 2025, 12:37 p.m.)
Issued	19 years, 9 months ago (Nov. 1, 2005)
Published	19 years, 9 months ago (Nov. 1, 2005)
Published Online	19 years, 9 months ago (Nov. 9, 2005)
Published Print	19 years, 9 months ago (Nov. 1, 2005)

Funders 0

None

BibTeX

@article{Wang_2005, title={Void formation during early stages of passivation: Initial oxidation of iron nanoparticles at room temperature}, volume={98}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.2130890}, DOI={10.1063/1.2130890}, number={9}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Wang, C. M. and Baer, D. R. and Thomas, L. E. and Amonette, J. E. and Antony, Jiji and Qiang, You and Duscher, G.}, year={2005}, month=nov }

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      "URL": "https://pubs.aip.org/jap/article/98/9/094308/924656/Void-formation-during-early-stages-of-passivation"
    }
  },
  "subtitle": [],
  "short-title": [],
  "issued": {
    "date-parts": [
      [
        2005,
        11,
        1
      ]
    ]
  },
  "references-count": 42,
  "journal-issue": {
    "issue": "9",
    "published-print": {
      "date-parts": [
        [
          2005,
          11,
          1
        ]
      ]
    }
  },
  "URL": "http://dx.doi.org/10.1063/1.2130890",
  "relation": {},
  "ISSN": [
    "0021-8979",
    "1089-7550"
  ],
  "subject": [],
  "published-other": {
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        2005,
        11,
        1
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    ]
  },
  "published": {
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        11,
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  "article-number": "094308"
}