Results 51 to 60 of about 68,825 (177)

Synthesis of Fe3O4@m-SiO2 Nanocomposites Using Rice Husk Ash Derived SiO2 [PDF]

Iranian Journal of Materials Science and Engineering
Fe3O4 nanoparticles (NPs) with a continuous and mesoporous silica (m-SiO2) shell were synthesized using a one-step method, sourcing silica from rice husk ash (RHA).
Nazli Aharipour, Adrine Malek khachatourian, Ali Nemati   +2 more
doaj  

A nonradiographic strategy to real‐time monitor the position of three‐dimensional‐printed medical orthopedic implants by embedding superparamagnetic Fe3O4 particles

Interdisciplinary Materials
Monitoring the position of orthopedic implants in vivo is paramount for enhancing postoperative rehabilitation. Traditional radiographic methods, although effective, pose inconveniences to patients in terms of specialized equipment requirements and ...
Yike Li, Peng Chen, Zhenhua Wu, Congcan Shi, Peng Chen, Yizhuo Xu, Xiaojun Chen, Manhui Chen, Yuxin Li, Chunze Yan, Yunsong Shi, Bin Su   +11 more
doaj   +1 more source

Nanosized superparamagnetic precipitates in cobalt-doped ZnO

, 2008
The existence of semiconductors exhibiting long-range ferromagnetic ordering at room temperature still is controversial. One particularly important issue is the presence of secondary magnetic phases such as clusters, segregations, etc...
B.D. Cullity, B.L. Henke, B.T. Thole, C.T. Chen, D. Schmeisser, F. Hofer, F.M.F. Groot De, H. Munekata, H. Ohno, I. Žutić, J. C. Cezar, J. Simon, J.L. Dormann, J.M.D. Coey, K. -W. Nielsen, K. Nielsen, K. Rode, K.R. Kittilstved, L. Néel, M. Opel, M. Venkatesan, P. Carra, R. Gross, R.C. O’Handley, S. Bauer, S. Gallego, S. Kolesnik, S. Kuroda, S. T. B. Goennenwein, S. Zhou, S.A. Chambers, S.A. Wolf, S.C. Wi, S.J. Naftel, T. Dietl, W. Mader, W.K. Liu, X.Z. Li   +37 more
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Fe Core–Carbon Shell Nanoparticles as Advanced MRI Contrast Enhancer

Journal of Functional Biomaterials, 2017
The aim of this study is to fabricate a hybrid composite of iron (Fe) core–carbon (C) shell nanoparticles with enhanced magnetic properties for contrast enhancement in magnetic resonance imaging (MRI).
Rakesh P. Chaudhary, Kim Kangasniemi, Masaya Takahashi, Samarendra K. Mohanty, Ali R. Koymen   +4 more
doaj   +1 more source

Controlled Synthesis and Characterization of Micrometric Single Crystalline Magnetite With Superparamagnetic Behavior and Cytocompatibility/Cytotoxicity Assessments

Frontiers in Pharmacology, 2020
A new class of magnetite (Fe3O4) particles, coined as “Single Crystalline Micrometric Iron Oxide Particles” (SCMIOPs), were obtained by hydrothermal synthesis.
Claudia Geanina Farcas, Claudia Geanina Farcas, Ioana Macasoi, Iulia Pinzaru, Marius Chirita, Marius Constantin Chirita Mihaila, Marius Constantin Chirita Mihaila, Marius Constantin Chirita Mihaila, Cristina Dehelean, Stefana Avram, Felicia Loghin, Liviu Mocanu, Virgil Rotaru, Adrian Ieta, Aurel Ercuta, Dorina Coricovac   +15 more
doaj   +1 more source

Fe₃O₄@SiO₂-NH₂ Functionalized Nanoparticles as a Potential Contrast Agent in Magnetic Resonance

Condensed Matter
The present work proposes a method for the synthesis of a nanoparticle with a superparamagnetic Fe3O4 core coated with SiO2-NH2 by ultrasound-assisted coprecipitation.
Brayan Stick Betin Bohorquez, Indry Milena Saavedra Gaona, Carlos Arturo Parra Vargas, Karina Vargas-Sánchez, Jahaziel Amaya, Mónica Losada-Barragán, Javier Rincón, Daniel Llamosa Pérez   +7 more
doaj   +1 more source

High temperature ferromagnetism of Li-doped vanadium oxide nanotubes

, 2009
The nature of a puzzling high temperature ferromagnetism of doped mixed-valent vanadium oxide nanotubes reported earlier by Krusin-Elbaum et al., Nature 431 (2004) 672, has been addressed by static magnetization, muon spin relaxation, nuclear magnetic ...
Arango, Y. C., Büchner, B., Kataev, V., Klauss, H. -H., Klingeler, R., Luetkens, H., Maeter, H., Popa, A. I., Täschner, C., Vavilova, E.   +9 more
core   +1 more source

Mössbauer Study of Weathering Products in Meteorites from the Atacama Desert

Magnetochemistry
During their stay at the surface of the Earth, meteorites undergo terrestrial weathering. In particular, the iron-nickel alloys and iron sulfides that are abundant in many types of meteorites transform into oxides and oxihydroxides (magnetite, maghemite,
Andrew Pyataev, Dilyara Kuzina, Jérôme Gattacceca, Carine Sadaka, Razilia Muftakhetdinova   +4 more
doaj   +1 more source

An Experimental Study on the Motion Through a Microchannel of a Ferrofluid Based on Ultrapure Magnetite Nanoparticles

Applied Sciences
This paper presents experimental research on the relationship between the magnetic properties and the viscosity of ferrofluid based on ultra-pure magnetite nanoparticles, with the aim of studying behaviour through a microchannel.
Dragoş-Viorel Brezoi, Anca Irina Gheboianu, Simona Mihai   +2 more
doaj   +1 more source

Spin-wave theory for finite classical magnets and superparamagnetic relation

, 2001
Analytical calculations based on finite-size spin-wave theory and Monte Carlo (MC) simulations are performed to investigate the validity of the well-known relation m(H,T)=M(H,T)B_D[M(H,T)NH/T] between the induced magnetization m of the magnetic particle ...
Garanin, D. A., Kachkachi, H.
core   +1 more source