| Autor: |
Moon JW; Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA., Rawn CJ, Rondinone AJ, Wang W, Vali H, Yeary LW, Love LJ, Kirkham MJ, Gu B, Phelps TJ |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of nanoscience and nanotechnology [J Nanosci Nanotechnol] 2010 Dec; Vol. 10 (12), pp. 8298-306. |
| DOI: |
10.1166/jnn.2010.2745 |
| Abstrakt: |
Average crystallite sizes of microbially synthesized pure, metal-, and lanthanide-substituted magnetite (bio-magnetite) were determined for a variety of incubation times and temperatures, substitutional elements and amounts, bacterial species, and precursor types. The intriguing difference between nanoparticle bio-magnetite and chemically synthesized magnetite (chem-magnetite) was that powder X-ray diffraction (XRD) data showed that the bio-magnetite exhibited slightly smaller lattice parameters, however, Raman Spectroscopy exhibited no difference in Fe-O bonding. These results indicate that bio-magnetite likely exhibits a more compact crystal structure with less uncoordinated iron on the surface suppressing negative pressure effects. The bio-magnetite with decreased lattice parameters could have potential technological advantages over current commercial chemically synthesized magnetites. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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