Gas phase synthesis of core-shell Fe@FeO x magnetic nanoparticles into fluids
| Autor: | S. C. Thornton, Sitki Aktas, Chris Binns, Phil Denby |
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| Přispěvatelé: | Belirlenecek |
| Rok vydání: | 2016 |
| Předmět: |
Materials science
MRI relaxivity Nanoparticle Bioengineering Sorbitol coating 02 engineering and technology 010402 general chemistry 01 natural sciences UV-visible spectrum Metal Magnetization chemistry.chemical_compound Nuclear magnetic resonance Molecule General Materials Science Stabilisation of nanoparticles into fluids General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics 0104 chemical sciences Core-shell magnetic nanoparticles Hysteresis chemistry Chemical engineering Modeling and Simulation visual_art visual_art.visual_art_medium Magnetic nanoparticles Sorbitol 0210 nano-technology Superparamagnetism |
| Zdroj: | Journal of Nanoparticle Research. 18 |
| ISSN: | 1572-896X 1388-0764 |
| DOI: | 10.1007/s11051-016-3659-8 |
| Popis: | AKTAS, SITKI/0000-0002-9143-6752; Binns, Chris/0000-0003-1711-375X WOS: 000389896600003 Sorbitol, short chain molecules, have been used to stabilise of Fe@FeOx nanoparticles produced in the gas phase under the ultra-high vacuum (UHV) conditions. The sorbitol coated Fe@FeOx nanoparticles produced by our method have a narrow size distribution with a hydrodynamic diameter of 35 nm after NaOH is added to the solution. Magnetisation measurement shows that the magnetic nanoparticles are superparamagnetic at 100 K and demonstrate hysteresis at 5 K with an anisotropy constant of 5.31 x 10(4) J/m(3) (similar to bulk iron). Also, it is shown that sorbitol is only suitable for stabilising the Fe@FeOx suspensions, and it does not prevent further oxidation of the metallic Fe core. According to MRI measurement, the nanoparticles have a high transverse relaxation rate of 425 mM(-1) s(-1). EnSol Norway (Norwegian Research Council (NRC)) [239750]; Republic of Turkey Ministry of National EducationMinistry of National Education - Turkey This study was funded by EnSol Norway (Norwegian Research Council (NRC) project number: 239750). Additionally, Sitki Aktas was supported by the Republic of Turkey Ministry of National Education. |
| Databáze: | OpenAIRE |
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