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Magnetic Nanocomposites: Preparation and Characterization of Polymer-Coated Iron Nanoparticles
Abstract
Nanoparticles bearing a strongly bound polymer coating were formed by the thermal decomposition of iron pentacarbonyl in the presence of ammonia and polymeric dispersants. The dispersants consist of polyisobutylene, polyethylene, or polystyrene chains functionalized with tetraethylenepentamine, a short polyethyleneimine chain. Polystyrene-based dispersants were prepared with both graft and block copolymer architectures. Inorganic−organic core−shell nanoparticles were formed with all three types of dispersants. In addition, more complex particles were observed in the case of the polystyrene-based dispersants in 1-methylnaphthalene. The core material was identified as metallic iron, while the particle shells are formed from the polymeric dispersant which binds to the core. High-resolution TEM revealed evidence for crystallization within the polymer shell, possibly facilitated by chain alignment upon binding. The nanocomposites display room-temperature magnetic behavior ranging from superparamagnetic to ferromagnetic. The saturation magnetization and coercivity were found to depend on the diameter of the iron core.
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Citations
Cites
Monodisperse FePt Nanoparticles and Ferromagnetic FePt Nanocrystal Superlattices
Sun, S., Murray, C. B., Weller, D., Folks, L., & Moser, A. (2000) · Science · doi:10.1126/science.287.5460.1989 · Cited by 6,137
Cited by
Magnetic Hydrogels and Their Potential Biomedical Applications
Li, Y., Huang, G., Zhang, X., Li, B., Chen, Y., Lu, T., Lu, T. J., & Xu, F. (2013) · Advanced Functional Materials · doi:10.1002/adfm.201201708 · Cited by 721
Horák, D., Babič, M., Macková, H., & Beneš, M. J. (2007) · Journal of Separation Science · doi:10.1002/jssc.200700088 · Cited by 342
Nitin, N., LaConte, L. E. W., Zurkiya, O., Hu, X., & Bao, G. (2004) · JBIC Journal of Biological Inorganic Chemistry · doi:10.1007/s00775-004-0560-1 · Cited by 295
Synthesis and magnetic properties of polymer nanocomposites with embedded iron nanoparticles
Wilson, J. L., Poddar, P., Frey, N. A., Srikanth, H., Mohomed, K., Harmon, J. P., Kotha, S., & Wachsmuth, J. (2004) · Journal of Applied Physics · doi:10.1063/1.1637705 · Cited by 258
Novel magnetic nanomaterials inspired by magnetotactic bacteria: Topical review
Prozorov, T., Bazylinski, D. A., Mallapragada, S. K., & Prozorov, R. (2013) · Materials Science and Engineering: R: Reports · doi:10.1016/j.mser.2013.04.002 · Cited by 137
Metadata
- Authors
- Burke, N. A. D., Stöver, H. D. H., & Dawson, F. P.
- Venue
- Chemistry of Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 2002-10-09
- Volume
- 14
- Issue
- 11
- Pages
- 4752-4761
- ISSN
- 0897-4756 (ISSN-L)
- 1520-5002
- OpenAlex
- W1974683139
- Cited by
- 243
- References
- 1
- FWCI
- 7.19
- Type
- journal article
- Language
- en
- Open access
- closed
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
