The DOI matches its Crossref record; 14 of the 14 references it cites were found in a registry or an index.
Surfactant effects in magnetite nanoparticles of controlled size
Open accessAbstract
Abstract Magnetite Fe3O4 nanoparticles of controlled size within 6 and 20 nm in diameter were synthesised by thermal decomposition of an iron organic precursor in an organic medium. Particles were coated with oleic acid. For all samples studied, saturation magnetisation Ms is size-independent, and reaches a value close to that expected for bulk magnetite, in contrast to results in small particle systems for which Ms is usually much smaller due to surface spin disorder. The coercive field for the 6 nm particles is in agreement with coherent rotation, taking the bulk magnetocrystalline anisotropy into account. Both results suggest that the oleic acid molecules covalently bonded to the nanoparticle surface yield a strong reduction in the surface spin disorder. However, although the saturated state may be similar, the approach to saturation is different and, in particular, the high-field differential susceptibility is one order of magnitude larger than in bulk materials. The relevance of these results in biomedical applications is discussed.
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Cites
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Self-citationStatic and dynamic magnetic properties of spherical magnetite nanoparticles
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Metadata
- Authors
- Guardia, P., Batlle-Brugal, B., Roca, A. G., Iglesias, O., Morales, M. P., Serna, C. J., Labarta, A., & Batlle, X.
- Venue
- Journal of Magnetism and Magnetic Materials
- Publisher
- Elsevier BV
- Published
- 2007-09
- Volume
- 316
- Issue
- 2
- Pages
- e756-e759
- ISSN
- 0304-8853 (ISSN-L)
- OpenAlex
- W1601387574
- Cited by
- 311
- References
- 14
- FWCI
- 6.95
- Type
- journal article
- Language
- en
- Open access
- green
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- Guardia, P., Batlle-Brugal, B., Roca, A. G., Iglesias, O., Morales, M. P., Serna, C. J., Labarta, A., & Batlle, X. (2007). Surfactant effects in magnetite nanoparticles of controlled size. Journal of Magnetism and Magnetic Materials. https://doi.org/10.1016/j.jmmm.2007.03.085
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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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