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Korth BD, Keng P, Shim I, et al. Polymer-coated ferromagnetic colloids from well-defined macromolecular surfactants and assembly into nanoparticle chains. J Am Chem Soc. 2006;128(20):6562-3doi: 10.1021/ja0609147.
Korth, B. D., Keng, P., Shim, I., Bowles, S. E., Tang, C., Kowalewski, T., Nebesny, K. W., & Pyun, J. (2006). Polymer-coated ferromagnetic colloids from well-defined macromolecular surfactants and assembly into nanoparticle chains. Journal of the American Chemical Society, 128(20), 6562-3. https://doi.org/10.1021/ja0609147
Korth, Bryan D, et al. "Polymer-coated ferromagnetic colloids from well-defined macromolecular surfactants and assembly into nanoparticle chains." Journal of the American Chemical Society vol. 128,20 (2006): 6562-3. doi: https://doi.org/10.1021/ja0609147
Korth BD, Keng P, Shim I, Bowles SE, Tang C, Kowalewski T, Nebesny KW, Pyun J. Polymer-coated ferromagnetic colloids from well-defined macromolecular surfactants and assembly into nanoparticle chains. J Am Chem Soc. 2006 May 24;128(20):6562-3. doi: 10.1021/ja0609147. PMID: 16704248.
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J Am Chem Soc. 2006 May 24;128(20):6562-3. doi: 10.1021/ja0609147.

Polymer-coated ferromagnetic colloids from well-defined macromolecular surfactants and assembly into nanoparticle chains.

Journal of the American Chemical Society

Bryan D Korth, Pei Keng, Inbo Shim, Steven E Bowles, Chuanbing Tang, Tomasz Kowalewski, Kenneth W Nebesny, Jeffrey Pyun

Affiliations

  1. Department of Chemistry, University of Arizona, 1306 East University Boulevard, Tucson, Arizona 85752, USA.

PMID: 16704248 DOI: 10.1021/ja0609147

Abstract

A novel synthetic route to polymer-coated ferromagnetic colloids of metallic cobalt has been developed. Well-defined end-functional polystyrenes were synthesized using controlled radical polymerization and used as surfactants in the thermolysis of dicobaltoctacarbonyl to afford uniform ferromagnetic nanoparticles. The presence of the polymer shell enabled prolonged colloidal stability of dispersions in a wide range of organic solvents and formed glassy encapsulating coatings around ferromagnetic cores in the solid state. These polymer-coated colloids assembled into robust, micron-sized nanoparticle chains when cast onto supporting surfaces due to dipolar associations of magnetic cores. Hierarchical assemblies were also prepared by blending polystyrene-coated cobalt colloids with larger silica beads.

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