Results 251 to 260 of about 121,355 (298)

Polysorbate Stabilised Fe3O4 and Fe3O4@Au Nanoparticle Synthesis and Characterisation

Materials Today: Proceedings, 2015
Polysorbate (tween) stabilised iron oxide and gold coated iron oxide nanoparticles were synthesised using the high-temperature solution phase reaction of iron(III) acetylacetate, Fe(acac)3, with 1,2-hexadecanediol and long chain alcohols. FT-IR analysis confirmed the presence of the surfactants on the nanoparticles, while the size and shape of the ...
Hendriëtte van der Walt, Lesley Chown
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Controllable synthesis and magnetic properties of Fe3O4 and Fe3O4@SiO2 microspheres

Journal of Materials Science, 2010
We present a systematic study on the preparation, microstructure, and magnetic properties of Fe3O4 microspheres and Fe3O4@SiO2 microspheres. Results showed that Fe3O4 microspheres’ diameter can be tuned by Fe3+ concentration, whereas their average grain size can be tuned by polyethylene glycol (PEG) 2000 dosage or PEG molecular weight.
Yang Cheng, Ruiqin Tan, Weiyan Wang, Yanqun Guo, Ping Cui, Weijie Song   +5 more
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Synthesis by ball milling and characterization of nanocrystalline Fe3O4 and Fe/Fe3O4 composite system

Journal of Applied Physics, 2001
Nanocrystalline Fe3O4 and a composite system constituted by nanocrystalline Fe and Fe3O4 have been synthesized by ball-milling commercial magnetite and an equimolar mixture of iron and magnetite powders. The physical parameters governing the milling process have been strictly controlled so as to achieve the nanocrystalline state of the precursor ...
Bonetti E., Del Bianco L., Signoretti S., Tiberto P.   +3 more
openaire   +2 more sources

Synthesis and characterization of Fe3O4@ZnS and Fe3O4@Au@ZnS core–shell nanoparticles

Applied Surface Science, 2014
In the present work we report new assets on the synthesis and characterization of magnetite based core-shell nanoparticles such as Fe3O4@ZnS and Fe3O4@Au@ZnS. The composites were prepared by seed mediated growth which consist in a sequential growth of a second or third component on a preformed magnetite seeds in the presence of sodium laurylsulphate ...
Stefan, M., Leostean, C., Pana, O., Soran, M.-L., C. Suciu, R., Gautron, E., Chauvet, Olivier   +6 more
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Emission Mossbauer spectroscopy study of the Fe3O4(100) surface and Fe3O4/MgO(100) and Fe3O4/CoO(100) interfaces

Physical Review. B: Condensed Matter and Materials Physics, 2003
Co-57 probe atoms were deposited on the surface of Fe3O4(100) films grown on MgO(100) substrates. In situ emission Mossbauer spectroscopy and reflection high-energy electron-diffraction measurements were performed on the surface after the deposition and after an annealing at 250 degreesC.
Kalev, L. A., Schurer, P., Niesen, L.
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Preparation and characterization of Fe3O4/ZIF-8 and Fe3O4–MnO2/ZIF-8 composites

Journal of the Iranian Chemical Society
Metal-organic frameworks (MOFs) have been employed in many studies recently because of their stability, porosity, and high surface area. Although zeolitic imidazole frameworks (ZIF-8) have many advantages among MOFs, they have disadvantages such as low activity, conductivity, and reusability depending on the application.
Fulya Kümbetlioğlu, Kürşad Oğuz Oskay, Ayten Ateş   +2 more
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Dielectric relaxation in Fe3O4

physica status solidi (a), 1985
Dielectric relaxations arising from the Maxwell-Wagner interfacial polarization and intrinsic electron hopping are found for Fe3O4 at the temperatures of 113 and 37 K. The distribution of the layers in the heterogeneous structure is obtained for the distribution of relaxation times in dielectric relaxation due to the Maxwell-Wagner interfacial ...
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Adsorption of Organic Dyes by Fe3O4@C, Fe3O4@C@C, and Fe3O4@SiO2 Magnetic Nanoparticles

Bulletin of the Russian Academy of Sciences: Physics, 2023
O. S. Ivanova, I. S. Edelman, A. E. Sokolov, E. S. Svetlitsky, S. M. Zharkov, A. L. Sukhachev, Ch. R. Lin, Yu. Zh. Chen   +7 more
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???????????????????????????????????????? ?? ?????????????????????? ???????????? ???????????????????? ?? ?????????????????????????? Fe3O4 - Y2O3 - Fe3O4

2011
?????? ?????????????????????????? Fe3O4???Y2O3???Fe3O4 ???????????????????? ?????????????????????? ?????????????????????? ??????????????????????????, ???????????????????????????????????????? ?? ?????????????????????? ???????????? ???????????????????? ???? ???????????????? ????????, ?????????????????????????? ???????????????????? ?????????????????? ?????
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Fe3O4

2023
Yoshiyuki Kawazoe, Takeshi Kanomata, Ryunosuke Note   +2 more
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