Chains of superparamagnetic nanoparticles

Kazuya Nakata*, Ying Hu, Oktay Uzun, Osman Bakr, Francesco Stellacci

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

140 Scopus citations

Abstract

A method is proposed to prepare chains of superparamagnetic iron oxide particles with blocking temperature higher than the nanoparticles. γ-Fe 2 O 3 superparamagnetic nanoparticles chains were used to investigate the chains formation. The study used molecular dynamic simulation to investigate the self-assembled monolayer. The study also used transmission electron microscopy (TEM) that determined the the average diameter of spherical nanoparticles. The particles were washed with ethanol during the study to eliminate the unbound ligands. The scanning tunneling microscopy (STM) was used to investigate the ligand shell morphology. It was observed during the experiment that the 1-D chains of superparamagnetic nanoparticles can be obtained by applying a magnetic field to produce magnetic dipolar coupling between the particles.

Original languageEnglish (US)
Pages (from-to)4294-4299
Number of pages6
JournalAdvanced Materials
Volume20
Issue number22
DOIs
StatePublished - Nov 18 2008

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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