Synthesis and characterization of silica nanotubes with radially oriented mesopores

Yatao Yu, Huibin Qiu, Xiaowei Wu, Huachun Li, Yongsheng Li, Yasuhiro Sakamoto, Yoshihisa Inoue, Kazutami Sakamoto, Osamu Terasaki, Shunai Che

Research output: Contribution to journalArticlepeer-review

61 Citations (Scopus)

Abstract

Hierarchical silica nanotubes with radially oriented mesoporous channels perpendicular to the central axis of the tube were synthesized by using self-assembled chiral anionic surfactant, costructure directing agent (CSDA) and silica precursor. The average inner diameter and the wall thickness were ∼94, ∼62, and ∼62 nm and to ∼27, ∼33, and ∼45 nm, respectively, by manipulating the synthesis gel composition, while the diameter of the wall mesopores was kept constant at ∼4 nm. These materials with such a unique structure were produced only with chiral surfactant and achiral or racemic surfactant did not give rise to mesoporous silica nanotubes. The existence of helicity in the lipid bilayer template was confirmed by means of circular dichroism spectroscopy. The mesoporous penetrating from outside to inside of silica nanotubes are thought to originate from the initial formation of self-assembled lipid tubes with helical bilayers, which in turn re-assemble to form the mesopores in the wall of the nanotubes upon addition of co-structure directing agent and silica source.

Original languageEnglish
Pages (from-to)541-550
Number of pages10
JournalAdvanced Functional Materials
Volume18
Issue number4
DOIs
Publication statusPublished - 2008 Feb 22

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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