Magnetic force microscopic images of nanometer-sized polyradical particles

Tsuyoshi Michinobu, Jun Inui, Hiroyuki Nishide*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Nanometer-sized polymer particles bearing 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) radicals were prepared. The emulsifier-free emulsion polymerization of methacrylic acid, methyl methacrylate, and methylenebisacrylamide and the following introduction of the TEMPO moiety produced polyradical particles with different spin concentrations. The TEMPO-combined particle was also prepared in one step by the anionic dispersion polymerization of 4-methacryloyloxy-2,2,6,6-tetramethylpiperidine-1-oxyl. The position and horizontal shape in the atomic and magnetic force microscopic images of the polyradical particle coincided with each other. The vertical scale of the magnetic image responded to the spin concentration of the particle. The particle beating the radicals on its surface gave a hollow dot image.

Original languageEnglish
Pages (from-to)71-75
Number of pages5
JournalPolymer Journal
Issue number1
Publication statusPublished - 2003


  • Anionic Dispersion Polymerization
  • Emulsifier-Free Emulsion Polymerization
  • Magnetic Force Microscopy (MFM)
  • Microparticle
  • Polyradical

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry


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