Preparation of Mesoscale and Macroscale Silica Nanotubes Using a Sugar-Appended Azonaphthol Gelator Assembly

Jong Hwa Jung, Seiji Shinkai, Toshimi Shimizu

Research output: Contribution to journalArticlepeer-review

98 Citations (Scopus)

Abstract

Sugar-appended azonaphthol derivatives 1 possessing an aromatic hydroxyl group and 2 possessing the n-butanoyloxy group were synthesized and proved to be capable of gelating water/ethanol mixtures. Gels formed by gelator 1 displayed different morphologies depending on the gelator concentration. The aqueous gel formed by 3.0 wt % of 1 consisted of crystalline fibers with thicknesses ranging from 400 to 600 nm, whereas at lower a concentration of gelator 1 (0.1 wt %) the gel consisted of a three-dimensional network of fibers with thicknesses of 20 to 30 nm. These gels were subjected to the sol-gel polymerization process, using tetraethoxysilane (TEOS). Interestingly, the obtained silica consisted of nanotubular structures with inner diameters of 20-25 nm and 450-600 nm using two different gels of 1, respectively. These results prove that the diameter size of silica nanotubes can be controlled by varying the gelator concentration.

Original languageEnglish
Pages (from-to)17-20
Number of pages4
JournalNano Letters
Volume2
Issue number1
DOIs
Publication statusPublished - Jan 1 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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