Evolution of standing mesochannels on porous anodic alumina substrates with designed conical holes

Yusuke Yamauchi, Tomota Nagaura, Ayako Ishikawa, Toyohiro Chikyow, Satoru Inoue

Research output: Contribution to journalArticlepeer-review

126 Citations (Scopus)

Abstract

We report the formation of standing mesochannels simply by spin-coating a precursor solution onto a PAA (porous anodic alumina) substrate with designed conical holes, utilizing exactly the same precursors and reaction conditions that form two-dimensional (2D) hexagonal mesoporous SBA-15-type films. When the aspect ratios of the conical holes are lower, the sponge-like mesopores are generated within the conical holes. Such a formation of sponge-like mesostructures truly acts as a trigger for the evolution of perpendicularly oriented and tilted mesochannels. On the other hand, when the PAA substrates with high-aspect cones are used, the mesochannels are stacked like a doughnut within the conical holes, which leads to parallel orientations of the mesochannels in the continuous film region.

Original languageEnglish
Pages (from-to)10165-10170
Number of pages6
JournalJournal of the American Chemical Society
Volume130
Issue number31
DOIs
Publication statusPublished - 2008 Aug 6
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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