• Maghemite nanoparticles are used in biomedicine, because they are biocompatible and non-toxic to humans, while their magnetism allows remote manipulation with external fields. (wikipedia.org)
  • Determining Magnetite/Maghemite Composition and Core-Shell Nanostructure from Magnetization Curve for Iron Oxide Nanoparticles. (mpg.de)
  • Structural, Thermodiffusive and thermoelectric properties of maghemite nanoparticles dispersed in ethylammonium nitrat, ChemEngineering 4 (1) (2020) 5 . (cea.fr)
  • Examples include hematite, magnetite and maghemite nanoparticles. (bvsalud.org)
  • Akaganeite, goethite, lepidocrocite, hematite, magnetite and maghemite were identified by X-ray diffraction as crystalline phase constituents of the rust layers. (upm.es)
  • This flexibility is accompanied by the formation of various single-crystalline phases (e.g., hematite, magnetite, maghemite, and wüstite) with different chemical and physical properties. (mis-asia.com)
  • It was found in 2022 that high levels of maghemite particles small enough to enter the bloodstream if inhaled, some as small as five nanometres, were present in the London Underground transport system. (wikipedia.org)
  • Dowex surface was covered by nanomaghemite (-Fe2O3) or maghemite particles surface was modified by chitosan and sulfoxyethyl cellulose. (vutbr.cz)
  • We aimed to establish enzyme immobilization technology using the maghemite/hydroxyapatite (Fe2O3/HA) composite particles as enzyme immobilization carriers and to clarify the enzyme adsorption characteristics of the composite particles. (elsevierpure.com)
  • While the researchers did not look at whether the maghemite particles pose a direct health risk, they believe their methods could be useful in future studies. (independent.co.uk)
  • Airborne dust is magnetic, and its characteristics suggest the magnetic mineral is maghemite, a very magnetic form of iron oxide, which may have been freeze-dried on the particles as a stain or cement. (nasa.gov)
  • The presence of maghemite is an additional anomalous feature. (usra.edu)
  • In this work, magnetic and GMI properties of amorphous Co 68.6 Fe 3.9 Mo 3.0 Si 12.0 B 12.5 ribbons were studied in as-quenched and surface modified states both without and in the presence of maghemite ferrofluid. (scite.ai)
  • Maghemite exhibits ferrimagnetic ordering with a high Néel temperature (~950 K), which together with its low cost and chemical stability led to its wide application as a magnetic pigment in electronic recording media since the 1940s. (wikipedia.org)
  • This was speculated as being because it contained the mineral maghemite, a magnetic iron oxide. (open.edu)
  • Maghemite (Fe2O3, γ-Fe2O3) is a member of the family of iron oxides. (wikipedia.org)
  • Synthetic nanocrystalline samples of maghemite, goethite, lepidocrocite, akaganéite, and ferrihydrite were pressed into compact pellets used to determine bulk n and k values from 100-1200 cm -1 . (caltech.edu)
  • We have determined the real and imaginary indices of refraction ( n and k ) for six iron oxide/oxyhydroxide phases - magnetite, maghemite, goethite, lepidocrocite, akaganéite, and ferrihydrite. (caltech.edu)
  • Colloidal assemblies of oriented maghemite nanocrystals and their NMR relaxometric properties. (docksci.com)
  • Maghemite can also form through dehydration and transformation of certain iron oxyhydroxide minerals, such as lepidocrocite and ferrihydrite. (wikipedia.org)
  • The principle iron-rich mineral component of these landform systems - maghemite - has been viewed as a nuisance by the geophysical fraternity, but Eastern Iron is turning some of these facts to it's advantage. (smedg.org.au)
  • Maghemite forms by weathering or low-temperature oxidation of spinels containing iron(II) such as magnetite or titanomagnetite. (wikipedia.org)
  • Maghemite was named in 1927 for an occurrence at the Iron Mountain mine, northwest of Redding, Shasta County, California. (wikipedia.org)
  • Such a hybrid conducting polymer iron oxide maghemite γ-Fe 2 O 3 @pDPL NC built specifically on covalent bonding has never been reported. (biu.ac.il)
  • The team found high levels of a type of iron oxide called maghemite. (independent.co.uk)
  • Importantly, maghemite forms from the weathering of iron in rocks. (open.edu)
  • The maghemite γ-Fe 2 O 3 NPs were prepared using an innovative ultrasound-assisted Ce 3 + doping process, resulting in polycarboxylation of the NP surface useful for control of aggregation and derivatization of functionality. (biu.ac.il)
  • None of the samples contains maghemite (γ-Fe 2 O 3 ). (ias.ac.in)
  • Maghemite is a polymorph of hematite with the same chemical formula, but with a spinel structure like magnetite. (google.com)
  • But iron oxide is not necessarily the optimal material for MR-based cell tracking, according to Nguyen T.K. Thanh, Ph.D., a Royal Society university research fellow and lecturer at the Center for Nanoscale Sciences at the University of Liverpool in the U.K. Its effect as a contrast agent is limited by the inherent magnetic susceptibility of its constituent components, magnetite (Fe3O4) and maghemite (gamma-Fe2O3). (diagnosticimaging.com)
  • These can then be converted to magnetite (Fe3O4) and maghemite (ɣ-Fe2O3) by a reduction or reduction-oxidation process while preserving the same morphology. (uni-konstanz.de)
  • Maghemite (Fe2O3, γ-Fe2O3) is a member of the family of iron oxides. (wikipedia.org)
  • The most efficient (photo)anodes are obtained with metal oxides and among them iron oxides (hematite alpha-Fe2O3), maghemite (gamma-Fe2O3), spinel (CoFe2O4, NiFe2O4, CuFe2O4) are promising. (cea.fr)
  • Here, we present temperature-dependent magnetic, X-ray, and neutron diffraction measurements refuting the current belief that the magnetic ordering temperature of ε-Fe 2 O 3 is ∼500 K, i.e., well below that of other iron oxides such as hematite, magnetite, or maghemite. (icmab.es)
  • No difference in the mineralogy of the precipitates was observed with the addition of Cu, whereas the addition of Ni and Zn markedly stimulated the formation of maghemite. (unicas.it)
  • SPIONs consisting predominantly of magnetite or maghemite display distinct chemical stability in solution but equivalent imaging properties when in cells. (rsc.org)
  • Our results enable identification of two magnetite/maghemite components of anthropogenic origin, derived mostly from vehicular traffic, plus a hematite component associated with a baseline supply of north African dust, in all the studied sites regardless of their type. (edu.au)
  • The use of pure culture of Pseudogulbenkiania strain 2002 resulted in hematite and maghemite formation and the activated sludge enrichment allowed the production of hematite and maghemite and/or magnetite. (unicas.it)