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*

*この研究の対応する著者

研究成果: Article査読

3 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)D171-D174
ジャーナルJournal of the Electrochemical Society
163
5
DOI
出版ステータスPublished - 2016

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 再生可能エネルギー、持続可能性、環境
  • 表面、皮膜および薄膜
  • 電気化学
  • 材料化学

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