Reducing size-dispersion in one-pot aqueous synthesis of maghemite nanoparticles
| Autor: | A. L. Drummond, N. C. Feitoza, Juliano A. Chaker, Andris F. Bakuzis, Marcelo Henrique Sousa, Maria J. A. Sales, G. C. Duarte, Luciano P. Silva |
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| Rok vydání: | 2013 |
| Předmět: |
Aqueous solution
Materials science Dispersity Biomedical Engineering Nanoparticle Maghemite Bioengineering General Chemistry engineering.material Condensed Matter Physics symbols.namesake chemistry.chemical_compound Chemical engineering chemistry Reagent engineering symbols General Materials Science Raman spectroscopy Dispersion (chemistry) Magnetite |
| Zdroj: | Journal of nanoscience and nanotechnology. 12(10) |
| ISSN: | 1533-4880 |
| Popis: | Nanosized maghemite-like particles with reduced size-distribution were obtained using a one-pot synthesis route in aqueous medium. Forced hydrolysis of iron ions in ammoniac solution led to the formation of magnetite nanoparticles that were oxidized to maghemite in a hydrothermal digestion step that reduced the polydispersity of nanograins. The prepared nanoparticles were characterized by chemical analysis, X-ray diffractometry, magnetization, Raman spectroscopy and transmission electron microscopy measurements. Data showed that 14 nm-sized particles with polydispersity of about 0.14 were produced and, differently from other procedures, neither additional steps nor toxic reagents were needed to reduce size-dispersion or to oxidize magnetite to maghemite. These facts per se turn such nanodevice into a good potential choice for biomedical applications. |
| Databáze: | OpenAIRE |
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