Synthesis, assembly, and functionalization of polymer-coated ferromagnetic nanoparticles

Bryan D. Korth, Pei Yuin Keng, Inbo Shim, Chuanbing Tang, Tomasz Kowalewski, Jeffrey Pyun

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations


A novel, robust synthetic methodology has been developed to prepare and functionalize well-defined ferromagnetic cobalt nanoparticles. Polystyrene (PS) surfactants of precise molar mass were prepared using controlled radical polymerization and used in the synthesis of metallic cobalt nanoparticles by the thermolysis of dicobaltoctacarbonyl (Co2(CO)8). Transmission electron microscopy (TEM), scanning probe microscopy (AFM, MFM), x-ray diffraction (XRD) and vibrating sample magnometry (VSM) confirmed that uniform (D = 15 nm ± 1.5 nm, PS shell = 2 nm), face centered cubic (fcc) cobalt nanocrystals that were prepared and ferromagnetic at room temperature (Ms = 38 emu/g, Hc = 100 Oe). A ligand exchange strategy to functionalize ferromagnetic nanoparticles was developed with functional polymeric surfactants.

Original languageEnglish (US)
Title of host publicationNanoparticles
Subtitle of host publicationSynthesis, Stabilization, Passivation, and Functionalization
PublisherAmerican Chemical Society
Number of pages14
ISBN (Print)9780841269699
StatePublished - Sep 19 2008

Publication series

NameACS Symposium Series
ISSN (Print)0097-6156
ISSN (Electronic)1947-5918

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering


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