Promotion of self-assembly patterning of fept nanoparticles by tuning the concentration of oleylamine/oleic acid surfactants in a coating solution

Yoshiki Fujihira, Takuma Hachisu, Suguru Shitanda, Kenichiro Aikawa, Atsushi Sugiyama, Jun Mizuno, Shuichi Shoji, Toru Asahi, Tetsuya Osaka

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

To provide a bit-patterned perpendicular magnetic recording medium consisting of an array of FePt magnetic nanoparticles, the effect of the total dispersant concentrations of oleylamine and oleic acid in a FePt-nanoparticle/toluene coating solution on a self-assembled nanoparticle array with a long-range periodicity on a flat SiO2/Si substrate and two patterned substrates, respectively, was examined. At a surfactant concentration greater than 0.8 vol%, FePt nanoparticles with an average size of 4.4 nm were arrayed in a two-dimensional and hexagonal-close-packed ordered array with 8.3-nm pitches on the flat surface. Self-assembled nanoparticles were arrayed on the bottom surface of the patterned trench, the array exhibited a hexagonal-close-packed structure. Furthermore the line defects in the arrays are caused by the waviness of the trench walls, and the surface roughness.

Original languageEnglish
Pages (from-to)D171-D174
JournalJournal of the Electrochemical Society
Volume163
Issue number5
DOIs
Publication statusPublished - 2016 Jan 1

Fingerprint

oleic acid
Oleic acid
promotion
Oleic Acid
Surface-Active Agents
Self assembly
coating
self assembly
Surface active agents
Tuning
surfactants
tuning
Nanoparticles
Coatings
nanoparticles
Magnetic recording
Toluene
magnetic recording
Substrates
toluene

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Cite this

Promotion of self-assembly patterning of fept nanoparticles by tuning the concentration of oleylamine/oleic acid surfactants in a coating solution. / Fujihira, Yoshiki; Hachisu, Takuma; Shitanda, Suguru; Aikawa, Kenichiro; Sugiyama, Atsushi; Mizuno, Jun; Shoji, Shuichi; Asahi, Toru; Osaka, Tetsuya.

In: Journal of the Electrochemical Society, Vol. 163, No. 5, 01.01.2016, p. D171-D174.

Research output: Contribution to journalArticle

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AU - Aikawa, Kenichiro

AU - Sugiyama, Atsushi

AU - Mizuno, Jun

AU - Shoji, Shuichi

AU - Asahi, Toru

AU - Osaka, Tetsuya

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