A novel fabrication technique for interacting ferromagnetic-metal nanoparticle systems: Fine-tuning of particle diameter and interparticle spacing

Satoshi Tomita, Kensuke Akamatsu, Hiroyuki Shinkai, Shingo Ikeda, Hidemi Nawafune, Chiharu Mitsumata, Takanari Kashiwagi, Masayuki Hagiwara

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

Abstract

Metallic Ni nanoparticles were embedded in polyimide (PI) films by applying a chemical surface modification technique. The technique consists of a simple alkali treatment of the PI films, an ion exchange reaction, and thermal annealing. The transmission electron microscopic studies showed that the initial alkali treatment time determined the diameter (d) of Ni nanoparticles formed by the annealing at 300°C. With increasing the annealing time, the thickness of the composite layers containing Ni nanoparticles decreased while the d was almost constant. The shrinkage of the composite layer led to a decrease in the spacing (r) among Ni nanoparticles. The d and r can thus be fine-tuned independently. Electron magnetic resonance study clearly indicated that the tuning of d and r enable us to control the magnetic dipolar interaction in the Ni nanoparticle systems. The present technique opens a new way to realize tailor-made nanomagnetic structures.

Original languageEnglish
Title of host publicationFabrication and New Applications of Nanomagnetic Structures
PublisherMaterials Research Society
Pages55-60
Number of pages6
ISBN (Print)1558998055, 9781558998056
DOIs
Publication statusPublished - 2004 Jan 1
Externally publishedYes
Event2004 MRS Fall Meeting - Boston, MA, United States
Duration: 2004 Nov 292004 Dec 2

Publication series

NameMaterials Research Society Symposium Proceedings
Volume853
ISSN (Print)0272-9172

Other

Other2004 MRS Fall Meeting
Country/TerritoryUnited States
CityBoston, MA
Period04/11/2904/12/2

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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