期刊
SMALL
卷 8, 期 23, 页码 3691-3697出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201200421
关键词
bionanotubes; flagella; titanium oxide; silica oxide; biotemplating
类别
资金
- National Science Foundation [DMR-0847758, IIP-0930708]
- National Institutes of Health [R01HL092526-01A2, R03AR056848-01, R21EB009909-01A1, 1R21EB015190-01A1]
- Oklahoma Center for Adult Stem Cell Research [434003]
- Oklahoma Center for the Advancement of Science and Technology [HR06-161S, HR11-006]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [847758] Funding Source: National Science Foundation
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [0854414, 0854465] Funding Source: National Science Foundation
Bacterial flagella, protein nanotubes (similar to 15 nm wide) detached from Salmonella typhimurium bacteria, are used to template the formation of titania/silica core/shell double-layered nanotubes in aqueous solution under ambient conditions through a solgel process. The thickness of each layer is tunable by varying the concentration of precursor solutions or reaction times. Upon heating, the flagella can be removed and the inner titania layer can be transformed into a nanocrystalline layer supported by the outer silica sheath. Nanotubes with different inner pore diameters and morphologies could be templated by other bionanofibers such as M13 phage and bacterial pili. This work shows that bionanofibers can be used as a universal biotemplate for the green synthesis of nanotubes with tunable wall thicknesses.
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