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Synthesis and Characterization of CoO, Co3O4, and Mixed Co/CoO Nanoparticules
Abstract
Very small nanometric oxide particles (CoO and Co 3 O 4, around 2 nm in diameter) well dispersed inside a polymer matrix were prepared by solid-state oxidation of a metallic colloid precursor (1.6 nm Co particles). WAXS (wide-angle X-ray scattering) and HREM (high-resolution electronic microscopy) were used to observe very precisely the structural changes occurring during the oxidation process. With cobalt particles a few nanometers large, air oxidation at room temperature results in a surface passivation. Consequently the particles show a composite structure with a metallic core surrounded by an oxide surface layer. Preliminary magnetic measurements reveal that unidirectional exchange anisotropy between the metallic ferromagnetic core and the antiferromagnetic oxide layer occurs below 130 K.
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Cited by
Laurent, S., Forge, D., Port, M., Roch, A., Robic, C., Vander Elst, L., & Muller, R. N. (2008) · Chemical Reviews · doi:10.1021/cr068445e · Cited by 6,852
Exchange bias in nanostructures
Nogués, J., Sort, J., Langlais, V., Skumryev, V., Suriñach, S., Muñoz, J. S., & Baró, M. D. (2005) · Physics Reports · doi:10.1016/j.physrep.2005.08.004 · Cited by 1,925
Colloidal heterostructured nanocrystals: Synthesis and growth mechanisms
Carbone, L., & Cozzoli, P. D. (2010) · Nano Today · doi:10.1016/j.nantod.2010.08.006 · Cited by 691
Tunable synthetic approaches for the optimization of nanostructured fuel cell catalysts: An overview
Bönnemann, H., & Nagabhushana, K. S. (2004) · Hemijska industrija · doi:10.2298/hemind0406271b · Cited by 6
Metadata
- Authors
- Verelst, M., Ely, T. O., Amiens, C., Snoeck, E., Lecante, P., Mosset, A., Respaud, M., Broto, J. M., & Chaudret, B.
- Venue
- Chemistry of Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 1999-09-18
- Volume
- 11
- Issue
- 10
- Pages
- 2702-2708
- ISSN
- 0897-4756 (ISSN-L)
- 1520-5002
- OpenAlex
- W2022221278
- Cited by
- 169
- References
- 0
- FWCI
- 4.00
- Type
- journal article
- Language
- en
- Open access
- closed
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- Verelst, M., Ely, T. O., Amiens, C., Snoeck, E., Lecante, P., Mosset, A., Respaud, M., Broto, J. M., & Chaudret, B. (1999). Synthesis and Characterization of CoO, Co3O4, and Mixed Co/CoO Nanoparticules. Chemistry of Materials. https://doi.org/10.1021/cm991003h
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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