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 language | English |
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Pages (from-to) | 17-20 |
Number of pages | 4 |
Journal | Nano Letters |
Volume | 2 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jan 1 2002 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Bioengineering
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
- Mechanical Engineering