Magnetic force microscopy images of a nanometer-sized, purely organic high-spin polyradical

Makoto Miyasaka, Yuka Saito, Hiroyuki Nishide*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


Magnetic force microscopy (MFM) was applied to study both the molecular image and the magnetic response of π-conjugated, non-Kekulé-, and nondisjoint-type poly(1,2-phenylenevinylene) (nondisjoint refers to a molecule in which non-bonding molecular orbitals share the same region in the molecule and a multiplet ground state is significantly stabilized) networks bearing 4-substituted di-tert-butylphenoxyl moities. The polyphenoxyl radicals 1 with molecular weights of 2.6, 9.3, and 32 kDa have a substantial stability even at room temperature and in air, and molecular sizes in the nanometer range of 10, 20, and 35 nm, respectively, with a disk-like shape. The MFM clearly shows a magnetic gradient response exactly on the position of the polyradical molecule dispersed on a graphite surface. The MFM molecular image of polyradical samples with different molecular weights and spin concentrations was examined as a nanoscale and single-molecular-based magnetic dot.

Original languageEnglish
Pages (from-to)113-117
Number of pages5
JournalAdvanced Functional Materials
Issue number2
Publication statusPublished - 2003 Feb

ASJC Scopus subject areas

  • Materials Science(all)
  • Electronic, Optical and Magnetic Materials
  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics


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