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

研究成果: Article査読

66 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)541-550
ページ数10
ジャーナルAdvanced Functional Materials
18
4
DOI
出版ステータスPublished - 2008 2月 22
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学

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