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Redox−Transmetalation Process as a Generalized Synthetic Strategy for Core−Shell Magnetic Nanoparticles

Lee, Woo-ram, Kim, Min Gyu, Choi, Joon-rak, Park, Jong-Il, Ko, Seung Jin, Oh, Sang Jun, Cheon, Jinwoo·2005·Journal of the American Chemical Society
DOI 10.1021/ja053659j
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Abstract

Although multicomponent core-shell type nanomaterials are one of the highly desired structural motifs due to their simultaneous multifunctionalities, the fabrication strategy for such nanostructures is still in a primitive stage. Here, we present a redox-transmetalation process that is effective as a general protocol for the fabrication of high quality and well-defined core-shell type bimetallic nanoparticles on the sub-10 nm scale. Various core-shell type nanomaterials including Co@Au, Co@Pd, Co@Pt, and Co@Cu nanoparticles are fabricated via transmetalation reactions. Compared to conventional sequential reduction strategies, this transmetalation process has several advantages for the fabrication of core-shell type nanoparticles: (i) no additional reducing agent is needed and (ii) spontaneous shell layer deposition occurs on top of the core nanoparticle surface and thus prevents self-nucleation of secondarily added metals. We also demonstrate the versatility of these core-shell structures by transferring Co@Au nanoparticles from an organic phase to an aqueous phase via a surface modification process. The nanostructures, magnetic properties, and reaction byproducts of these core-shell nanoparticles are spectroscopically characterized and identified, in part, to confirm the chemical process that promotes the core-shell structure formation.

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Metadata

Authors
Lee, W.-R., Kim, M. G., Choi, J.-R., Park, J.-I., Ko, S. J., Oh, S. J., & Cheon, J.
Venue
Journal of the American Chemical Society
Publisher
American Chemical Society (ACS)
Published
2005-10-28
Volume
127
Issue
46
Pages
16090-16097
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
DOI
10.1021/ja053659j
OpenAlex
W2031818942
Cited by
284
References
0
FWCI
6.89
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Redox−Transmetalation Process as a Generalized Synthetic Strategy for Core−Shell Magnetic Nanoparticles. https://app.cochat.ai/papers/10.1021/ja053659j
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Lee, W.-R., Kim, M. G., Choi, J.-R., Park, J.-I., Ko, S. J., Oh, S. J., & Cheon, J. (2005). Redox−Transmetalation Process as a Generalized Synthetic Strategy for Core−Shell Magnetic Nanoparticles. Journal of the American Chemical Society. https://doi.org/10.1021/ja053659j

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