Nanoparticles of magnetite magnetite nanoparticles. Medical search. Frequent questions

Verwey, E. J. W. Electronic conduction of magnetite (Fe3O4) and its transition point at low temperatures. (nature.com)
Structure of magnetite (Fe3O4) below the Verwey transition-temperature. (nature.com)
Wright, J. P., Attfield, J. P. & Radaelli, P. G. Charge ordered structure of magnetite Fe3O4 below the Verwey transition. (nature.com)
Magnetite (Fe3O4) is prepared by combining Fe2+ and Fe3+ ions with a weak base in dilute aqueous solution. (flinnsci.com)
The size and shape dependent tunable electromagnetic (EM) properties of magnetite - Fe3O4 nanoparticles makes them an attractive material for various future electronics and biomedical device applications such as tunable attenuators, miniaturized isolators and circulators, RF antennas, EM shielding, and biomedical implants etc. (intechopen.com)
Magnetic nanoparticles (NPs) MnFe2O4 and Fe3O4 were stabilised by depositing an Al(OH)3 layer via a hydrolysis process. (kcl.ac.uk)

The "bottom-up" method is to use magnetite crystals to grow nanoscale particles. (wevolver.com)
Changing the reaction conditions, notably the rotational speed and angle of tilt of the tube, influenced the wrapping of the magnetite particles which have improved magnetic properties over those produced using traditional batch processing. (edu.au)
You are talking about millions of magnetite particles per gram of freeze-dried brain tissue-it is extraordinary. (truthdig.com)
Many of the magnetite particles we have found in the brain are very distinctive," said Maher. (truthdig.com)
An analysis of roadside air in Lancaster found 200m magnetite particles per cubic metre . (truthdig.com)
During the last decade, scientific research on the diverse magnetic properties of bulk materials, particles, microparticles, and nanoparticles has been adequately supported by various new and sophisticated characterization techniques. (scirp.org)
The resulting magnetite particles are extremely small nanoparticles. (flinnsci.com)
Rather than settle out as a solid, the magnetite particles remain suspended in the aqueous medium, giving rise to a magnetic liquid! (flinnsci.com)
Moreover, nanofluid, a liquid containing a dispersion of sub-micronic solid particles (nanoparticles) with typical length of the order of 1-50 nm, showed abnormal convective heat transfer enhancement, which is remarkable. (deepdyve.com)
Analysis suggested that the oxidized ZVI nanoparticles will experience a 10 −19 N maximum shear force in pore channels, much lower than the imaging forces in AFM, suggesting the mechanical stability of the particles during water remediation. (rsc.org)
Combined experimental and theoretical approach to the kinetics of magnetite crystal growth from primary particles. (mpg.de)
Formation of magnetite nanoparticles at low temperature: from superparamagnetic to stable single domain particles. (mpg.de)
Using an array of eight flux-gate magnetometers the particle lung burden of magnetite particles is analyzed in vivo. (cdc.gov)
The magnetometric method is less sensitive than chemical analysis and is limited to particles with magnetic properties like magnetite, but it has the potential for repeated noninvasive measurements of distinct particle populations in the same animal. (cdc.gov)

Scientists from SCAMT Institute have devised a way to produce nanoparticles of iron oxides (magnetite, hematite, maghemite) using water-alcohol synthesis, as well as modify their color, size, and functional properties. (wevolver.com)
One of the experiments resulted in the creation of nanoparticles, but for a period of time the researchers were unable to reproduce the synthesis. (wevolver.com)
The values of isomer shift in Mössbauer spectra of about 0.33 mm s−1 showed that all Fe(II) in substoichiometric magnetites oxidized to Fe(III) one month after synthesis. (irb.hr)
The results show that all synthesis methods produce Fe3-xO4 nanoparticles with similar sizes. (ua.pt)
The nanoparticles synthesized in the gelatine medium display the narrowest particle size distribution, the lowest oxidation degree, one of the highest saturation magnetization values and the best hyperthermia efficiency, proving that this gelatine-assisted synthesis is an efficient, environmental friendly, and low-cost method to produce magnetite nanoparticles. (ua.pt)
Biologically controlled synthesis and assembly of magnetite nanoparticles. (mpg.de)

This study aimed to evaluate the toxicity of superparamagnetic iron oxide nanoparticles (SPIONs) synthesized by biogenic (BS) and chemical (CH) routes. (mdpi.com)
Surface modification of superparamagnetic iron oxide nanoparticles (SPIONs) has been introduced with lauric acid and oleic acid via co-precipitation and thermal decomposition methods, respectively. (nature.com)

Towards this purpose{,} mildly epoxidized natural rubber (ENR)-magnetite nanoparticle (MN) nanocomposites are prepared and the absorption of petrol (gasoline) is studied. (amrita.edu)
Nanocomposites containing magnetic iron oxide (magnetite) nanoparticles and layered double hydroxide (LDH) nanosheets were prepared by two different methods, exfoliation-reassembly and coprecipitation, for aqueous chromate adsorbent. (hindawi.com)
Towards multi-ferroic nanocomposites from ferroelectric polymer and magnetic nanoparticles. (mpg.de)

Incorporation of magnetite nanoparticle clusters in fluorescent silica nanoparticles for high-performance brain tumor delineation. (anaspec.com)

Among the main results, the study showed that the main use of laser pyrolysis is to produce nanoparticles and coatings, the main materials worked by laser pyrolysis are silicon and carbon dioxide and the main searched properties in the products of laser pyrolysis are catalysts activity and electrical conductivity. (springer.com)

The extremely stable aqueous suspension of substoichiometric Fe2.83O4 magnetite nanoparticles ~4.7 nm in size were formed at a dose rate of ~7 kGy h−1 and at a dose of 36 kGy. (irb.hr)
In this thesis, the adsorption potential of a novel poly(acrylic-co-maleic) acid coated magnetite nanoparticles (PAM@MNP) for Pb2+ and Cu2+ removal from an aqueous solution was investigated. (rwth-aachen.de)
Stable suspensions of Zn²⁺ substituted magnetite (ZnxFe3-xO4, 0 = x ≤ 0.20) nanoparticles in aqueous solutions (pH 5.5) were synthesized by means of co-precipitation approach, using citric acid (CA) and pluronic F127 as surfactants for hyperthermia application. (uni-freiburg.de)
In this report, we demonstrate arsenic removal from an aqueous solution and natural water taken from the Peruvian river (Tambo River in Arequipa, Peru) using magnetite NPs synthesized by the coprecipitation method. (edu.pe)
Ageing in the Inorganic Nanoworld: Example of Magnetite Nanoparticles in Aqueous Medium (str. (srce.hr)

Polymer coated superparamagnetic magnetite nanoparticles with a mean diameter of less than 10 nm have been fabricated using a co-precipitation method under continuous flow conditions within a vortex fluidic device (VFD). (edu.au)
Reactive nanoparticles can remove a wide variety of water contaminants, and a nanoparticle polymer composite membrane could serve as a reactive and physical barrier during water filtration, with the potential to improve overall contaminant removal. (rsc.org)

Magnetite nanoparticles are also thought to form in soils, where they probably oxidize rapidly to maghemite. (wikipedia.org)
Determining Magnetite/Maghemite Composition and Core-Shell Nanostructure from Magnetization Curve for Iron Oxide Nanoparticles. (mpg.de)

Zinc substituted spinel ferrite nanoparticles are appropriate for magnetic fluid hyperthermia. (uni-freiburg.de)
Impact of Stoichiometry and Size on the Magnetic Properties of Cobalt Ferrite Nanoparticles. (mpg.de)

The latest research study " Magnetite Nanoparticles Market: Global Industry Trends, Share, Size, Growth, Opportunity and Forecast 2022-2027 " by IMARC Group, finds the global magnetite nanoparticles market reached a value of US$ 65.84 Million in 2021. (asapmix.com)

Selective 2-Propanol Oxidation over Unsupported Co 3 O 4 Spinel Nanoparticles: Mechanistic Insights into Aerobic Oxidation of Alcohols. (uni-due.de)
Morphological changes resulting from the oxidation of zero valent iron (ZVI) nanoparticles were measured as an assessment of their mechanical robustness in mixed matrix membranes for water treatment applications. (rsc.org)

In this study, superparamagnetic Fe 3 O 4 nanoparticles and the antibiotic vancomycin were loaded into chitosan microbeads cross-linked with varying lengths of polyethylene glycol dimethacrylate. (nih.gov)

Ferrofluids (FFs) of metal oxide nanoparticles in ionic liquids (ILs) are a potentially useful class of magnetic materials for many applications because of their properties related to temperature/pressure stability, hydrophobicity, viscosity and recyclability. (tue.nl)

TEM investigation showed that mean particle sizes of the coated nanoparticles were in the range of 35-40 nm. (uni-freiburg.de)
LDH nanosheets well covered magnetite nanoparticles with house-of-cards-like structure in exfoliation-reassembly method, while coprecipitation resulted in LDH particle formation along with magnetite nanoparticles. (hindawi.com)
Magnetic force imaging of a chain of biogenic magnetite and Monte Carlo analysis of tip-particle interaction. (mpg.de)

At high dose and dose rate, the rolled rod-like δ-FeOOH magnetic nanoparticles were formed having the diffraction patterns with streaks, which are characteristic of tubular structures. (irb.hr)
The structure and morphology of the synthesized nanoparticles were investigated by powder X-ray diffraction and transmission electron microscopy. (ua.pt)
Here we report the full low-temperature superstructure of magnetite, determined by high-energy X-ray diffraction from an almost single-domain, 40-micrometre grain, and identify the emergent order. (nature.com)
Reciprocal lattice synchrotron X-ray diffraction intensities for magnetite microcrystal grains at 90 K. (nature.com)
The nanoparticles were characterized by X-ray diffraction (XRD), X-ray spectroscopy (XPS), atomic force microscopy (AFM), vibrating-sample magnetometry (VSM-SQUID), Fourier-transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM). (mdpi.com)

The magnetosome membrane protein, MmsF, is a major regulator of magnetite biomineralization in Magnetospirillum magneticum AMB-1. (mpg.de)
Magnetite biomineralization in bacteria. (mpg.de)

Aim: Accumulating evidence has indicated that hyperthermia using magnetite nanoparticles induces antitumor immunity. (elsevierpure.com)
This study investigated the diversity of T-cell receptors (TCRs) in tumor-infiltrating lymphocytes after hyperthermia using magnetite nanoparticles.Materials & methods: Functionalized magnetite nanoparticles, N-propionyl-4-S-cysteaminylphenol (NPrCAP)/magnetite, were synthesized by conjugating the melanogenesis substrate NPrCAP with magnetite nanoparticles. (elsevierpure.com)
NPrCAP/magnetite nanoparticles were injected into B16 melanomas in C57BL/6 mice, which were subjected to an alternating magnetic field for hyperthermia treatment. (elsevierpure.com)
The nanoparticles potential for applications in magnetic hyperthermia was evaluated through heating efficiency under alternating magnetic field. (ua.pt)
Maximum obtained specific loss power (SLP) was 539 W/g and that of intrinsic loss power (ILP) was 7.26 nHm²/kg for x = 0.05 (f = 290 kHz, H = 16 kA/m) with a nanoparticle concentration as low as 1.2 mg/ml, which is a promising candidate for magnetic hyperthermia applications potentially. (uni-freiburg.de)

The lower dose rate (~7 kGy h−1) favored the δ-FeOOH nanodisc morphology, whereas the higher dose rate (~31 kGy h−1) favored the formation of tubular rod-like δ- FeOOH nanoparticles. (irb.hr)
FTIR spectra reconfirmed formation of pure magnetite and Zn²⁺ substituted magnetite nanoparticles and also proved the presence of ligands on the surface of the nanoparticles. (uni-freiburg.de)
XRD data analysis of Fe 3 O 4 NPs revealed the formation of the cubic-spinel phase of magnetite with an average crystallite size of ~ 13 nm, which is found in good agreement with the physical size assessed from TEM image analysis. (edu.pe)
Formation and Stabilization of Noble Metal Nanoparticles (str. (srce.hr)
Elongated magnetite nanoparticle formation from a solid ferrous precursor in a magnetotactic bacterium. (mpg.de)
Biomimetic magnetite formation: from biocombinatorial approaches to mineralization effects. (mpg.de)
This might be connected with the formation of gel structures due to strong magnetic attraction between ferromagnetic nanoparticles. (scirp.org)

Magnetite reacts with oxygen to produce hematite, and the mineral pair forms a buffer that can control how oxidizing its environment is (the oxygen fugacity). (wikipedia.org)
This buffer is known as the hematite-magnetite or HM buffer. (wikipedia.org)

As a member of the inverse spinel group, magnetite can form solid solutions with similarly structured minerals, including ulvospinel (Fe2TiO4) and magnesioferrite (MgFe2O4). (wikipedia.org)

Manganese incorporation into the magnetosome magnetite: magnetic signature of doping. (mpg.de)

that of DNA-functionalized nanoparticles, providing a pathway for nanoparticle assembly in general. (osti.gov)

Assembled biogenic magnetic nanoparticles: properties of magnetosome chains and their stability against external magnetic fields. (mpg.de)

Zeta-potential measurement also revealed that the magnetite surface was effectively covered by LDH moiety in exfoliation-reassembly compared with coprecipitation. (hindawi.com)
For instance, MgAl-LDH nanoparticles were in situ grown on magnetic CoFe 2 O 4 nanoparticles through coprecipitation by Deng et al. (hindawi.com)
Similarly, ZnAl-LDH was introduced on magnetic Fe 3 O 4 nanoparticles by coprecipitation [ 20 ], showing ~20 mg Cr(VI)/g adsorbent at 800 ppm chromate solution. (hindawi.com)

Understanding the physicochemical factors affecting nanoparticles transport in porous media is critical for their application in soil or other media system. (rwth-aachen.de)
Nanoparticles for intravascular applications: physicochemical characterization and cytotoxicity testing. (mpg.de)

The effects of the volume fraction of nanoparticles, permeability, magnetic field, chemical reaction and Schmidt number on velocity, temperature and concentration fields are examined and graphically illustrated. (deepdyve.com)

The prepared nanosystems exhibited satisfactory magnetic properties with saturation magnetization slightly lower than raw magnetite.The combination of size, shape, surface charge, hidrophilicity and magnetic behaviour make the magnetic nanosystems here obtained highly suitable and promising to diagnostic and therapeutic applications. (conicet.gov.ar)
Magnetite nanoparticles (NPs) are structures formed of various metallic elements such as metal alloys or iron, nickel and platinum, and cobalt, which possess super magnetic properties at ambient temperatures. (asapmix.com)
A versatile Hall magnetometer has been developed, manufactured, calibrated, and turned operational for measurements of the magnetic properties of bulk materials and magnetic micro- and nanoparticles. (scirp.org)
Taken together, the results of this study demonstrate that the mechanical properties of the nanoparticle composite membranes are such that minimal mechanical degradation of the nanoparticles will occur during water filtration. (rsc.org)
1-7 One promising nanomaterial is zero-valent iron (ZVI) nanoparticles, which have been previously studied as active systems for removal of contaminants from water due to their reactive properties. (rsc.org)

Magnetite is a mineral and one of the main iron ores, with the chemical formula Fe2+Fe3+2O4. (wikipedia.org)
Naturally magnetized pieces of magnetite, called lodestone, will attract small pieces of iron, which is how ancient peoples first discovered the property of magnetism. (wikipedia.org)
In addition to igneous rocks, magnetite also occurs in sedimentary rocks, including banded iron formations and in lake and marine sediments as both detrital grains and as magnetofossils. (wikipedia.org)
This indicates that magnetite contains both ferrous (divalent) and ferric (trivalent) iron, suggesting crystallization in an environment containing intermediate levels of oxygen. (wikipedia.org)
This latest study "suggests that most magnetite found in the human brain, a magnetic iron oxide compound, comes from industrial air pollution. (truthdig.com)
Future Advances in Diagnosis and Drug Delivery in Interventional Radiology Using MR Imaging-Steered Theranostic Iron Oxide Nanoparticles. (polymtl.ca)
Additional quartz crystal microbalance experiments were performed to confirm the mechanical stability of the oxidized iron nanoparticles in the flow environments of ultrafiltration. (rsc.org)
Using quartz crystal microbalance, atomic force microscopy, and modeling techniques, we demonstrate that zero valent iron nanoparticles become oxidized after exposure to water yet remain mechanically robust at flow rates comparable to those used in filtration applications. (rsc.org)
Self-Confined Nucleation of Iron Oxide Nanoparticles in a Nanostructured Amorphous Precursor. (mpg.de)
Optimizing the Binding Energy of the Surfactant to Iron Oxide Yields Truly Monodisperse Nanoparticles. (mpg.de)
Effect of precursor concentration on size evolution of iron oxide nanoparticles. (mpg.de)
Combined Experimental and Theoretical Investigation of Heating Rate on Growth of Iron Oxide Nanoparticles. (mpg.de)
Pectin-decorated magnetite nanoparticles as both iron delivery systems and protective matrices for probiotic bacteria. (conicet.gov.ar)
Ullrich, A. and Horn, S. (2013) Structural Investigations on Differently Sized Monodisperse Iron Oxide Nanoparticles Synthesized by Remineralization of Apoferritin Molecules. (scirp.org)

The initial sedimentation rate of the nanoparticles in water and under magnetic fields is higher for less concentrated suspensions (c 0 = 0.1 g/l) than for more concentrated ones (c 0 = 1 g/l). (scirp.org)

The mineral magnetite (Fe 3 O 4 ) undergoes a complex structural distortion and becomes electrically insulating at temperatures less than 125 kelvin. (nature.com)
At low temperatures, magnetite undergoes a crystal structure phase transition from a monoclinic structure to a cubic structure known as the Verwey transition. (wikipedia.org)

Natural and synthetic magnetite occurs most commonly as octahedral crystals bounded by {111} planes and as rhombic-dodecahedra. (wikipedia.org)
In the presence of mineralizers such as 0.1 M HI or 2 M NH4Cl and at 0.207 MPa at 416-800 °C, magnetite grew as crystals whose shapes were a combination of rhombic-dodechahedra forms. (wikipedia.org)

In the future, magnetite nanoparticles could potentially be used in the treatment of neurocognitive diseases. (wevolver.com)
Oxidative cell damage is one of the hallmark features of Alzheimer's disease, and this is why the presence of magnetite is so potentially significant, because it is so bioreactive. (truthdig.com)

Apart from this, the focus of the researchers on attaining functionalized magnetite NPs via green chemistry to lessen environmental pollution is influencing the market growth. (asapmix.com)

Small grains of magnetite are very common in igneous and metamorphic rocks. (wikipedia.org)

Relaxation Time of Proton Adsorption from Solution onto Magnetite and Anatase: Classical and New Theoretical Approach (str. (srce.hr)

Treatment of contaminated water with magnetite (Fe 3 O 4 ) nanoparticles (NPs) can play a crucial role in arsenic removal. (edu.pe)
Tests using natural water taken from Tambo River indicate a significant reduction of arsenic concentration from 356 µg L − 1 to 7.38 µg L − 1 , the latter is below the limit imposed by World Health Organization (10 µg L − 1 ), suggesting that magnetite NPs show great potential for the arsenic removal. (edu.pe)

For comparison, magnetite nanoparticles were also prepared by standard co-precipitation, by co-precipitation with the addition of a surfactant (sodium dodecyl sulphate) and by the thermal decomposition method. (ua.pt)
Cryo-transmission electron microscopy (cryo-TEM) of the IL-based FFs allowed direct visualization of the surfactant-stabilized nanoparticles in the ILs and the native, hardly aggregated state of their dispersion. (tue.nl)

11-13 For water treatment applications, ZVI nanoparticles are commonly immobilized in nanoparticle-enhanced membranes, or mixed matrix membranes, which is a novel method for immobilizing nanoparticles in a filtration membrane while simultaneously taking advantage of their reactive treatment capabilities. (rsc.org)
Tang, S.C.N. and Lo, I.M.C. (2013) Magnetic Nanoparticles: Essential Factors for Sustainable Environmental Applications. (scirp.org)

Mandel, K. and Hutter, F. (2012) The Magnetic Nanoparticle Separation Problem. (scirp.org)

New eco-friendly nanocomposite materials have been synthesized from natural rubber (NR) and magnetite nanoparticles for the first time. (amrita.edu)
Although ZVI nanoparticles are promising materials for removing a wide range of contaminants from drinking water, intact nanoparticles and ZVI degradation products could also become contaminants if not properly immobilized or filtered. (rsc.org)

Magnetotactic bacteria form magnetite from a phosphate-rich ferric hydroxide via nanometric ferric (oxyhydr)oxide intermediates. (mpg.de)
Test-System for Bacteria Sensing Based on Peroxidase-Like Activity of Inkjet-Printed Magnetite Nanoparticles. (nih.gov)

4-Mercaptophenyldiphenylphosphine as linker to immobilize Pd onto the surface of magnetite nanoparticles. (upc.edu)
The molecule 4-mercaptophenyldiphenylphosphine (Sdp) has been synthesized for use as a linker to immobilize Pd nanoparticles onto the surface of magnetite nanoparticles. (upc.edu)
However, concerns arise in terms of being able to confidently immobilize nanoparticles in a filtration membrane with long-term resistance to nanoparticle leaching. (rsc.org)

Toxic magnetic nanoparticles from air pollution have been discovered in "abundant" quantities in human brains, according to a new study. (truthdig.com)
Abnormal accumulation of brain metals is a key feature of Alzheimer's disease and a recent study showed that magnetite was directly associated with the damage seen in Alzheimer's brains," the Guardian notes. (truthdig.com)
In conclusion, the study showed that laser pyrolysis is a consolidated technology within its main application fields (nanoparticles and coatings) for several years. (springer.com)

Journal of Nanoparticle Research, 15, 1821. (scirp.org)
Journal of Nanoparticle Research, 7, 331-342. (scirp.org)
Journal of Nanoparticle Research, 14, 1-11. (scirp.org)
Journal of Nanoparticle Research, 15, 2054. (scirp.org)

Two types of alkylthiol-terminated poly(acrylic acid) (PAAs, varying in length) are synthesized and used to functionalize gold nanoparticles (AuNPs) to mimic similar assembly effects of single-stranded DNA-capped AuNPs using synthetic polyelectrolytes. (osti.gov)

High shear in the VFD allows controlled growth of the nanoparticles and their wrapping by the non-toxic polyvinyl pyrrolidine (PVP). (edu.au)
Wettability of magnetite nanoparticles guides growth from stabilized amorphous ferrihydrite. (mpg.de)
Nucleation and growth of magnetite from solution. (mpg.de)
Nucleation and growth of magnetite nanoparticles under biomimetic conditions. (mpg.de)

Such analyses are necessary for nanoparticle bound water filtration membranes to ensure safety and long-term durability. (rsc.org)
Sedimentation dynamics of magnetite ( γ -Fe 3 O 4 ) nanopowders (10 - 20 nm) in water in the presence of a gradient magnetic field was studied by optical and Nuclear Magnetic Resonance (NMR) relaxometry methods. (scirp.org)

Anatomy3

Organisms5

Chemicals and Drugs24

Analytical, Diagnostic and Therapeutic Techniques and Equipment14

Phenomena and Processes9

Disciplines and Occupations3

Technology, Industry, Agriculture15

Fe3O46

Particles14

Synthesis6

Superparamagnetic iron oxide nanoparticles2

Nanocomposites3

Silica Nanoparticles1

Produce nanoparticles1

Aqueous5

Polymer2

Maghemite2

Ferrite nanoparticles2

20221

Oxidation2

Chitosan1

Ferrofluids1

Particle3

Diffraction5

Biomineralization2

Hyperthermia5

Formation7

Hematite2

Spinel1

Incorporation1

Pathway1

Biogenic1

Coprecipitation3

Physicochemical2

Permeability1

Properties5

Iron14

Magnetic Fields1

Undergoes2

Crystals2

Potentially2

Chemistry1

Grains1

Adsorption1

Removal2

Surfactant2

Applications2

Separation1

Materials2

Bacteria2

Immobilize3

Study3

RESEARCH4

Synthetic1

Growth4

Water2