Magnetically induced orientation of mesochannels in 2D-hexagonal mesoporous silica films

Yusuke Yamauchi, Makoto Sawada, Atsushi Sugiyama, Tetsuya Osaka, Yoshio Sakka, Kazuyuki Kuroda

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

Mesoporous silica films with uniaxially oriented mesochannels were prepared by dip coating under a steady-homogeneous magnetic field parallel to a substrate. The effect of a strong magnetic field (12 Tesla) on the preparation of mesoporous silica films was systematically investigated by using two kinds of templates. When mesoporous silica films with a 2D-hexagonal structure were prepared by using an ionic CTAB (hexadecyltrimethylammonium bromide)-based precursor solution, the in-plane XRD results of the films proved that the mesochannels were slightly oriented parallel to the magnetic field. When mesoporous silica films were prepared by using a non-ionic P123 (polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer)-based precursor solution, the directional distribution of the mesochannels became narrow (FWHM was about 20°). The use of large molecules such as triblock copolymers leads to successful magnetically induced orientation. The spatial orientations of the magnetically aligned mesochannels are elucidated by -2 XRD, in-plane XRD, cross-sectional transmission electron microscopy (TEM), and high resolution scanning electron microscopy (HR-SEM).

Original languageEnglish
Pages (from-to)3693-3700
Number of pages8
JournalJournal of Materials Chemistry
Volume16
Issue number37
DOIs
Publication statusPublished - 2006

Fingerprint

Silicon Dioxide
Silica
silicon dioxide
Magnetic fields
Polyethylene oxides
Block copolymers
oxides
polyethylenes
copolymers
magnetic fields
Polypropylene oxides
High resolution electron microscopy
Full width at half maximum
polypropylene
coating
bromides
templates
Transmission electron microscopy
Coatings
preparation

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Chemistry
  • Materials Science(all)

Cite this

Magnetically induced orientation of mesochannels in 2D-hexagonal mesoporous silica films. / Yamauchi, Yusuke; Sawada, Makoto; Sugiyama, Atsushi; Osaka, Tetsuya; Sakka, Yoshio; Kuroda, Kazuyuki.

In: Journal of Materials Chemistry, Vol. 16, No. 37, 2006, p. 3693-3700.

Research output: Contribution to journalArticle

Yamauchi, Yusuke ; Sawada, Makoto ; Sugiyama, Atsushi ; Osaka, Tetsuya ; Sakka, Yoshio ; Kuroda, Kazuyuki. / Magnetically induced orientation of mesochannels in 2D-hexagonal mesoporous silica films. In: Journal of Materials Chemistry. 2006 ; Vol. 16, No. 37. pp. 3693-3700.
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