| Autor: |
Mahmoud WE; Faculty of Science, Physics Department, King Abdulaziz University , Jeddah, Saudi Arabia., Bronstein LM, Al-Hazmi F, Al-Noaiser F, Al-Ghamdi AA |
| Jazyk: |
angličtina |
| Zdroj: |
Langmuir : the ACS journal of surfaces and colloids [Langmuir] 2013 Oct 22; Vol. 29 (42), pp. 13095-101. Date of Electronic Publication: 2013 Oct 10. |
| DOI: |
10.1021/la403158d |
| Abstrakt: |
Here, we report the synthesis, characterization, and properties of Fe/Fe3O4 core-shell nanocubes prepared via a simple route. It includes NaBH4 reduction of FeCl3 in an ethylene glycol solution in the presence of 2-mercaptopropionic acid (surfactant) and trisodium citrate (cosurfactant) followed by surface oxidation with trimethylamine N-oxide. The morphology and structure of Fe/Fe3O4 core-shell nanocubes were characterized using transmission electron microscopy (TEM), high-resolution TEM, selected area electron diffraction, X-ray powder diffraction, and X-ray photoelectron spectroscopy. All of the methods confirm a Fe/Fe3O4 core-shell structure of nanocubes. Magnetic measurements revealed that the Fe/Fe3O4 core/shell nanocubes are superparamagnetic at 300 K with a saturation magnetization of 129 emu/g. The T2 weighted imaging and the T2 relaxation time showed high MRI contrast and sensitivity, making these nanocubes viable candidates as enhanced MRI contrast agents. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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