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Synthesis of “Solid Solution” and “Core-Shell” Type Cobalt−Platinum Magnetic Nanoparticles via Transmetalation Reactions
Abstract
In this article, we report the synthesis of "solid solution" and "core-shell" types of well-defined Co--Pt nanoalloys smaller than 10 nm. The formation of these alloys is driven by redox transmetalation reactions between the reagents without the need for any additional reductants. Also the reaction proceeds selectively as long as the redox potential between the two metals is favorable. The reaction between Co(2)(CO)(8) and Pt(hfac)(2) (hfac = hexafluoroacetylacetonate) results in the formation of "solid solution" type alloys such as CoPt(3) nanoparticles. On the other hand, the reaction of Co nanoparticles with Pt(hfac)(2) in solution results in "Co(core)Pt(shell)" type nanoalloys. Nanoparticles synthesized by both reactions are moderately monodispersed (sigma < 10%) without any further size selection processes. The composition of the alloys can also be tuned by adjusting the ratio of reactants. The magnetic and structural properties of the obtained nanoparticles and reaction byproducts are characterized by TEM, SQUID, UV/vis, IR, EDAX, and XRD.
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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
Perspectives on the Physical Chemistry of Semiconductor Nanocrystals
Alivisatos, A. P. (1996) · The Journal of Physical Chemistry · doi:10.1021/jp9535506 · Cited by 3,595
Cited by
Nanoalloys: From Theory to Applications of Alloy Clusters and Nanoparticles
Ferrando, R., Jellinek, J., & Johnston, R. L. (2008) · Chemical Reviews · doi:10.1021/cr040090g · Cited by 3,690
Ghosh, S. K., & Pal, T. (2007) · Chemical Reviews · doi:10.1021/cr0680282 · Cited by 2,782
Platinum-Based Nanostructured Materials: Synthesis, Properties, and Applications
Chen, A., & Holt-Hindle, P. (2010) · Chemical Reviews · doi:10.1021/cr9003902 · Cited by 1,390
Shape Control of Semiconductor and Metal Oxide Nanocrystals through Nonhydrolytic Colloidal Routes
Jun, Y., Choi, J., & Cheon, J. (2006) · Angewandte Chemie International Edition · doi:10.1002/anie.200503821 · Cited by 1,123
Self-citationTuning Nanoparticle Catalysis for the Oxygen Reduction Reaction
Guo, S., Zhang, S., & Sun, S. (2013) · Angewandte Chemie International Edition · doi:10.1002/anie.201207186 · Cited by 994
Metadata
- Authors
- Park, J.-I., & Cheon, J.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2001-05-25
- Volume
- 123
- Issue
- 24
- Pages
- 5743-5746
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W1970673754
- Cited by
- 374
- References
- 2
- FWCI
- 12.13
- Type
- journal article
- Language
- en
- Open access
- closed
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- Park, J.-I., & Cheon, J. (2001). Synthesis of “Solid Solution” and “Core-Shell” Type Cobalt−Platinum Magnetic Nanoparticles via Transmetalation Reactions. Journal of the American Chemical Society. https://doi.org/10.1021/ja0156340
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