Results 201 to 210 of about 49,070 (235)

Preparation and Properties of Magnetite and Polymer Magnetite Nanoparticles

Langmuir, 1999
A novel approach to prepare magnetic polymeric nanoparticles by synthesis of the magnetite core and polymeric shell in a single inverse microemulsion is reported. Stable magnetic nanoparticles colloid dispersion with narrow size distribution can thus be produced.
Pierre A. Dresco, Vladimir S. Zaitsev, Richard J. Gambino, Benjamin Chu   +3 more
openaire   +1 more source

Giant magnetostriction in magnetite nanoparticles

Materials Science and Engineering: B, 2012
Abstract Typically the value of the magnetostrictive coefficient (λ) observed for bulk magnetic materials such as cubic ferrites is 10−6. However, giant magnetostriction (λ  ≤ 10−3) is only observed in a few bulk intermetallic materials based on alloys of rare earth and iron such as TbFe, TbFe2, DyFe2 and Terefenol-D.
G. Balaji, R. Aravinda Narayanan, A. Weber, F. Mohammad, C.S.S.R. Kumar   +4 more
openaire   +1 more source

Cryochemical Synthesis of Magnetite Nanoparticles

Moscow University Chemistry Bulletin, 2018
Magnetite nanoparticles 2–20 nm in size, forming agglomerates up to 70 nm in size, are obtained by cryochemical synthesis.
O. I. Vernaya, V. P. Shabatin, T. I. Shabatina   +2 more
openaire   +1 more source

Magnetite nanoparticles for medical applications

AIP Conference Proceedings, 2020
Magnetite nanoparticles with 15-30 nm average sizes were prepared by thermal decomposition. Their crystal structures and morphology were analyzed in correlation with the magnetic properties. Magnetic features, characteristic to Verwey transition were shown. The magnetizations and coercive fields increase parallelly with the nanoparticles sizes.
Roxana Dudric, Gabriela Souca, Ádám Szatmári, Tamás Szilárd, Stefan Nitica, Cristian Iacovita, Alin Iulian Moldovan, Rares Stiufiuc, Romulus Tetean, Emil Burzo   +9 more
openaire   +1 more source

Magnetite Nanoparticle-Linked Immunosorbent Assay

The Journal of Physical Chemistry C, 2008
Using chitosan-modified magnetite nanoparticles (CS-MNPs) as a replacement of enzymes in conventional ELISA configurations, a magnetic nanoparticle-linked immunosorbent assay is developed. The CS-MNPs are synthesized by using a one-step solvothermal process, where chitosan in the reaction system is used both as a ligand and as a surface modification ...
Lizeng Gao, Jiamin Wu, Sarah Lyle, Keith Zehr, Liangliang Cao, Di Gao   +5 more
openaire   +1 more source

Mössbauer studies of magnetite nanoparticles

Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques, 2014
Magnetite Fe3O4 samples with different levels of dispersion (“bulk” and nanoscale particles with an average diameter of 24, 14 and 7 nm) are studied using Mossbauer spectroscopy. It is shown that this method of analysis makes it possible to obtain important information about the features of magnetic states of iron-containing nanoparticles and, more ...
M. A. Shipilin, I. N. Zakharova, A. M. Shipilin, V. I. Bachurin   +3 more
openaire   +1 more source

 Magnetotransport of magnetite nanoparticle arrays

Physical Review B, 2006
We combine a material self-assembly with conventional lithographic processes in order to fabricate magnetoelectronic devices composed of ordered three-dimensional arrays of magnetite $({\mathrm{Fe}}_{3}{\mathrm{O}}_{4})$ nanoparticles. The device magnetoresistance reaches 35% at 60 K, corresponding to an electron spin polarization of 73 ...
Hao Zeng, C. T. Black, R. L. Sandstrom, P. M. Rice, C. B. Murray, Shouheng Sun   +5 more
openaire   +1 more source

Extrinsic magnetoresistance in magnetite nanoparticles

Journal of Applied Physics, 2003
Magnetite (Fe3O4) nanoparticles, 8 to 9 nm in size, have been synthesized using an aqueous precipitation technique. X-ray diffraction and chemical titration confirm a single cubic spinel phase with expected stoichiometry. Superparamagnetic behavior has been observed in pressed pellets of the nanoparticles above 200 K.
Kai Liu, L. Zhao, P. Klavins, Frank E. Osterloh, H. Hiramatsu   +4 more
openaire   +1 more source

Strong adsorption of chlorotetracycline on magnetite nanoparticles

Journal of Hazardous Materials, 2011
In this work, environmentally friendly magnetite nanoparticles (Fe(3)O(4) MNPs) were used to adsorb chlorotetracycline (CTC) from aqueous media. Fe(3)O(4) MNPs exhibit ultrahigh adsorption ability to this widely used antibiotic. The adsorption behavior of CTC on Fe(3)O(4) MNPs fitted the pseudo-second-order kinetics model, and the adsorption ...
Di, Zhang, Hongyun, Niu, Xiaole, Zhang, Zhaofu, Meng, Yaqi, Cai   +4 more
openaire   +2 more sources

Mechanochemical Activation of Magnetite Nanoparticles

Journal of Nanoparticle Research, 2000
Using Mossbauer spectroscopy as a function of ball milling time, it was found that nanomagnetite behaves differently than magnetite during mechanochemical activation. The phase sequence is determined by the original particle size of the powder.
openaire   +1 more source