Results 261 to 270 of about 68,717 (304)

Fe3O4·C and ZrO2·Fe3O4·C nanostructures: Synthesis and characterization

Russian Journal of General Chemistry, 2015
A procedure for the synthesis of carbon-encapsulated multilayer magnetite and zirconium oxide–magnetite nanoparticles that form porous nanostructures, for use as biocompatible sorbents, is proposed. The properties, composition, dimensions, particle shapes, surface morphology, and magnetic characteristics of the products are studied.
V. N. Postnov, E. B. Naumysheva, M. V. Afonin, D. V. Korolev, I. V. Murin   +4 more
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +2 more sources

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.
openaire   +1 more source

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
openaire   +1 more source

The magnetization reversal and low field compensation in a Fe3O4/Mn3O4/Fe3O4 trilayer

Journal of Applied Physics, 2011
Fe3O4(25 nm)/Mn3O4(50 nm)/Fe3O4(25 nm) trilayered structures are fabricated by molecular beam epitaxy and detailed magnetization characterizations are studied. The remanence magnetization versus temperature (Mr–T) shows a magnetic compensation point at ∼22 K, but this is unexpected for the present configuration.
S. C. Lin, K. M. Kuo, G. Chern
openaire   +1 more source

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
openaire   +1 more source

Preparation and evaluation of a poly(N-vinylcarbazole)–Fe3O4 (PNVC–Fe3O4) nanocomposite

Materials Chemistry and Physics, 2011
Abstract N-vinylcarbazole (NVC) was polymerised in bulk in presence of nano sized Fe3O4 and a nanocomposite of poly (N-vinylcarbazole)–Fe3O4 (PNVC–Fe3O4) was isolated from the system. The yield of the PNVC–Fe3O4 composite increased with increasing time of polymerization as well as with [Fe3O4]/[PNVC] loadings.
Ipsita Haldar, Arnab Kundu, Mukul Biswas, Arabinda Nayak   +3 more
openaire   +1 more source

???????????????????????????????????????? ?? ?????????????????????? ???????????? ???????????????????? ?? ?????????????????????????? Fe3O4 - Y2O3 - Fe3O4

2011
?????? ?????????????????????????? Fe3O4???Y2O3???Fe3O4 ???????????????????? ?????????????????????? ?????????????????????? ??????????????????????????, ???????????????????????????????????????? ?? ?????????????????????? ???????????? ???????????????????? ???? ???????????????? ????????, ?????????????????????????? ???????????????????? ?????????????????? ?????
openaire   +1 more source