Relevant bibliographies by topics / Maghemite Synthesis

Academic literature on the topic 'Maghemite Synthesis'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Maghemite Synthesis"

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El-Subruiti, G. M., A. S. Eltaweil, and S. A. Sallam. "Synthesis of Active MFe2O4/γ-Fe2O3 Nanocomposites (Metal = Ni or Co) for Reduction of Nitro-Containing Pollutants and Methyl Orange Degradation." Nano 14, no. 10 (October 2019): 1950125. http://dx.doi.org/10.1142/s179329201950125x.

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Metal-ferrite/maghemite nanocomposites (NiFe2O4/***[Formula: see text]-Fe2O3 and CoFe2O4/[Formula: see text]-Fe2O[Formula: see text] were synthesized via doping maghemite with metal salt (NiCl2 or CoCl[Formula: see text] followed by reduction of metal ions using NaBH4. The synthesized metal-ferrite/maghemite nanocomposites were characterized by thermogravimetric analysis (TGA), X-ray diffraction (XRD), transmission electron microscopy (TEM), vibrating sample magnetometer (VSM), Fourier transform infrared (FTIR) and the amounts of the dopant-metal (Ni/Co) were determined using ICP-OES technique. Results showed that this synthetic route produced nanocomposites with highly active ferrite phases MFe2O4. The synthesized nanocomposites exhibited exceptional catalytic activities for the reduction of 4-nitrophenol and 2-nitroaniline as well as the catalytic degradation of methyl orange. Specific activity parameter of NiFe2O4/[Formula: see text]-Fe2O3 and CoFe2O4/[Formula: see text]-Fe2O3 toward reduction of 4-NP reached 993.9 and 929.8[Formula: see text]s[Formula: see text][Formula: see text]g[Formula: see text], respectively. These high values of specific activities are higher than most reported metal-ferrite composites prepared via traditional co-precipitation methods. Besides, strong magnetic properties of the prepared metal-ferrite/maghemites facilitates easy separation process for several reuses.
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Sinha, Arvind, Jui Chakraborty, P. A. Joy, and P. Ramachandrarao. "Magnetic field–induced biomimetic synthesis of superparamagnetic poly (vinyl alcohol)–maghemite composite." Journal of Materials Research 19, no. 6 (June 2004): 1676–81. http://dx.doi.org/10.1557/jmr.2004.0246.

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Poly (vinyl alcohol)–mediated synthesis of monodisperse, self-assembled, superparamagnetic maghemite particles was carried out through a magnetic field–induced biomimetic route. Modifying the kinetics of precipitation, the magnetic field promoted the nucleation of the maghemite phase over magnetite and also induced a self-assembly–assisted shape anisotropy during the precipitation of the particles in the polymer matrix.
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Ikhaddalene, Soumia, Fatima Zibouche, Alain Ponton, Amar Irekti, and Florent Carn. "Synthesis and Rheological Properties of Magnetic Chitosan Hydrogel." Periodica Polytechnica Chemical Engineering 65, no. 3 (May 6, 2021): 378–88. http://dx.doi.org/10.3311/ppch.17148.

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The aim of the present work is first to synthesis a magnetic chitosan hydrogel (chitosan ferrogel) using the blending method and second to study it rheological behavior. Magnetic components ( maghemite particles γ-Fe2O3 ) were synthesized via a simple chemical co-precipitation route also called Massart's procedure. Before being dispersed in chitosan network, γ-Fe2O3 particles were covered with a cationic polyelectrolyte (Polydiallyldimethylammonium chloride; PDADMAC) and the exact quantity required to cover the entire surface of maghemite particles was determined by Electrophoretic mobility. The successful functionalization of maghemite particles was confirmed by zeta potential measurement. The prepared ferrogel was gelified using glyoxal as crosslinking agent. The effect of continuous magnetic field on rheological properties of the elaborated ferrogel was studied, under controlled temperature before and after the gelation process, using a rotating rheometer fitted with a new magneto-rheological cell. Moreover the influence of iron oxide content on the gelation time of magnetic hydrogel was studied by comparing two ferrogels with different maghemite particles content. Flow and viscoelastic measurements showed that applying magnetic field facilitates the formation of a new structure (column-like arrangements), which was confirmed by in situ optical microscopic observation. Kinetic study was investigated by mechanical spectroscopy and demonstrates that the gelation time depends on both iron oxides content and magnetic field.
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Kartswnakis, Ioannis, N. Papadopoulos, P. Tserotas, and P. Švec. "Low-Temperature Synthesis of Maghemite Nanoparticles." Key Engineering Materials 543 (March 2013): 468–71. http://dx.doi.org/10.4028/www.scientific.net/kem.543.468.

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Recently, the preparation of magnetic iron oxide nanoparticles has been thoroughly studied due to their unique electric and magnetic properties. Magnetic nanoparticles find uses in a wide range of applications, from data storage and sensors to medical imaging and cancer treatment. Herein, we report a fast and economic chemical procedure for the growth of monodispersed maghemite nanoparticles (NPs) from iron pentacarbonyl Fe (CO)5. The reaction takes place in a closed vessel where the oxidation strength of dimethylsulfoxide (DMSO) is limited by the reductive strength of liberated carbon monoxide from the initial complex. DMSO strips metallic Fe from the intermediate organometallic precursors (e.g. Fe2(CO)9, Fe3(CO)12), which form at temperatures above 100 °C, while at the same time oxidizes it in a controlled manner to the desired magnetic phase at temperatures as low as 130 OC, without the need for the classical refluxing step. Oleic acid is also used as a surfactant, thus maintaining a narrow size distribution of NPs. Another advantage of the synthetic route is the short reaction time (30 min).
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Drofenik, Miha, Gregor Ferk, Matjaž Kristl, and Darko Makovec. "Synthesis and characterization of maghemite nanosheets." Materials Letters 65, no. 3 (February 2011): 439–41. http://dx.doi.org/10.1016/j.matlet.2010.11.009.

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Bee, A., R. Massart, and S. Neveu. "Synthesis of very fine maghemite particles." Journal of Magnetism and Magnetic Materials 149, no. 1-2 (August 1995): 6–9. http://dx.doi.org/10.1016/0304-8853(95)00317-7.

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Kotsyubynsky, V., A. Hrubiak, V. Moklyak, L. Mohnatska, and S. Fedorchenko. "Synthesis and Properties of Mesoporous Maghemite." Acta Physica Polonica A 133, no. 4 (April 2018): 1035–37. http://dx.doi.org/10.12693/aphyspola.133.1035.

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Sinha, Arvind, Suprabha Nayar, G. V. S. Murthy, P. A. Joy, V. Rao, and P. Ramachandrarao. "Biomimetic synthesis of superparamagnetic iron oxide particles in proteins." Journal of Materials Research 18, no. 6 (June 2003): 1309–13. http://dx.doi.org/10.1557/jmr.2003.0180.

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Matrix-mediated in situ synthesis of monodispersed magnetite and maghemite nanoparticles (2–16 nm) was carried out using the cavities present in gels of globular proteins such as egg white and bovine serum albumin. Under stringent conditions, spatial-charge-distribution-assisted molecular recognition of proteins for inorganic ions led to the site- and polymorph-specific synthesis of superparamagnetic iron oxide particles. A transformation from magnetite to maghemite as a nucleating phase could be observed by partially denaturing the egg white protein, signifying the delicate role of quaternary structure of proteins under different reaction conditions, in determining the size and shape of the polymorph.
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Nurdin, Irwan, Mohd Rafie Johan, Iskandar Idris Yaacob, and Bee Chin Ang. "Effect of Nitric Acid Concentrations on Synthesis and Stability of Maghemite Nanoparticles Suspension." Scientific World Journal 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/589479.

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Maghemite(γ-Fe2O3)nanoparticles have been synthesized using a chemical coprecipitation method at different nitric acid concentrations as an oxidizing agent. Characterization of all samples performed by several techniques including X-ray diffraction (XRD), transmission electron microscopy (TEM), alternating gradient magnetometry (AGM), thermogravimetric analysis (TGA), dynamic light scattering (DLS), and zeta potential. The XRD patterns confirmed that the particles were maghemite. The crystallite size of all samples decreases with the increasing concentration of nitric acid. TEM observation showed that the particles have spherical morphology with narrow particle size distribution. The particles showed superparamagnetic behavior with decreased magnetization values at the increasing concentration of nitric acid. TGA measurement showed that the stability temperature decreases with the increasing concentration of nitric acid. DLS measurement showed that the hydrodynamic particle sizes decrease with the increasing concentration of nitric acid. Zeta potential values show a decrease with the increasing concentration of nitric acid. The increasing concentration of nitric acid in synthesis of maghemite nanoparticles produced smaller size particles, lower magnetization, better thermal stability, and more stable maghemite nanoparticles suspension.
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Trushkina, Yulia, Cheuk-Wai Tai, and German Salazar-Alvarez. "Fabrication of Maghemite Nanoparticles with High Surface Area." Nanomaterials 9, no. 7 (July 12, 2019): 1004. http://dx.doi.org/10.3390/nano9071004.

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Maghemite nanoparticles with high surface area were obtained from the dehydroxylation of lepidocrocite prismatic nanoparticles. The synthesis pathway from the precursor to the porous maghemite nanoparticles is inexpensive, simple and gives high surface area values for both lepidocrocite and maghemite. The obtained maghemite nanoparticles contained intraparticle and interparticle pores with a surface area ca. 30 × 103 m2/mol, with pore volumes in the order of 70 cm3/mol. Both the surface area and pore volume depended on the heating rate and annealing temperature, with the highest value near the transformation temperature (180–250 °C). Following the transformation, in situ X-ray diffraction (XRD) allowed us to observe the temporal decoupling of the decomposition of lepidocrocite and the growth of maghemite. The combination of high-angle annular dark-field imaging using scanning transmission electron microscopy (HAADF-STEM) and surface adsorption isotherms is a powerful approach for the characterization of nanomaterials with high surface area and porosity.
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Dissertations / Theses on the topic "Maghemite Synthesis"

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Bittencourt, Rodrigo Ferreira. "Síntese e avaliação de hidrogéis à base de alginato e nanopartículas magnéticas preparadas in situ para remoção de Mn(II) e Ni(II) de efluente industrial." Universidade do Estado do Rio de Janeiro, 2015. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=8935.

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Esta Dissertação teve como objetivo,a síntese de hidrogéis à base de alginato e nanopartículas magnéticas (maghemita) preparadas in situ. Os hidrogéis foram preparados em diferentes concentrações de alginato de sódio (2 e 3% m/v), FeSO4 (0,3 e 0,5 mol L-1) e CaCl2 (0,1 e 0,3 mol L-1). As propriedades físico-químicas dos hidrogéis foram analisadas e, posteriormente, foram avaliados quanto à capacidade de remoção de íons Ni2+ e Mn2+ de soluções aquosas. Para caracterização das amostras foram utilizadas diversas técnicas de análises, tais como, análise granulométrica, microscopia óptica (OM), microscopia eletrônica de varredura (SEM), microscopia eletrônica de transmissão (TEM), magnetometria de amostra vibrante (VSM), espectroscopia na região do infravermelho por transformada de Fourier (FTIR), difratometria de raios-X (XRD), espectroscopia Mössbauer, e análise termogravimétrica (TGA). Foram preparados hidrogéis com morfologia predominantemente esférica e dimensões micrométricas (500 a 850 m), com átomos de Fe e Ca dispersos uniformemente em sua estrutura. Os hidrogéis apresentaram boa resistência térmica e comportamento superparamagnético. As amostras foram intumescidas em água deionizada durante um intervalo de tempo a fim de avaliar o grau de intumescimento (Q) para determinar a amostra com a melhor resposta para posterior aplicação em solução aquosa contendo íons metálicos (Ni2+ e Mn2+). Os resultados revelaram que a amostra cuja concentração de 3% m/v de alginato de sódio, 0,3 mol L-1 de FeSO4 e 0,3 mol L-1 de CaCl2 obteve maior Q (50%). Em consequência deste resultado, optou-se por utilizar estaamostra, na remoção de metais pesados presentes em soluções aquosas e em efluentes industriais. Vários parâmetros,tais como: tempo de contato,pH, concentração inicial do íon e massa de hidrogel foram estudados.Os resultados, para efluente sintético, revelaram que o tempo de equilíbrio foi de 60 minutos; a capacidade de remoção dos metais melhora com o aumento de pH (3 a 9), sendo máxima em pH 7;quanto menor a concentração inicial da solução iônica (50 a 500 mg L-1), maior a capacidade de remoção, 52% de Ni2+ e 49% de Mn2+ (concentração inicial de 50 mg L-1). No efluente industrial, a remoção foi de 61% de Ni2+ e 57% de Mn2+(300 mg de hidrogel). Os resultados encontrados revelaram que os hidrogéis magnéticos produzidos à base de alginato têm potencial uso no tratamento de efluentes industriais contaminados com metais pesados
This Dissertation aims thesynthesis of hydrogels based on alginate and magnetic nanoparticles (maghemite) prepared in situ. Hydrogels were prepared at different concentrations of sodium alginate (2 and 3% w/v), FeSO4 (0.3 and 0.5 mol L-1) and CaCl2 (0.1 and 0.3 mol L-1). The physicochemical properties of the hydrogels were analyzed and, subsequently, evaluated for their ability to remove ions Ni2+ and Mn2+ from aqueous solutions. In orderto characterize the samples,several techniques were used, such as, granulometric analysis, optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Mössbauer spectroscopy and thermogravimetry analysis (TGA). Hydrogels with predominant spherical morphology and micrometric dimension were prepared (500 and 850 m) with atoms of Fe and Ca dispersed uniformly in their structure. The hydrogels presented good thermal resistance and superparamagnetic behavior. The samples were swollen in deionized water, for a period of time, to evaluate the swelling degree (Q) and determine the sample with the best result for subsequent application in an aqueous solution containing metallic ions (Ni2+ and Mn2+). The results revealed that the sample with concentration of 3% w/v of sodium alginate, 0.3 mol L-1 of FeSO4, and 0.3 mol L-1 of CaCl2 presented the higher Q (50%). In consequence of this result, we decided to use thissample, in the removal of heavy metals from aqueous solution and industrial wastewater.Several parameters, such as: contact time, pH, initial concentration of ionic solution and hydrogel mass were studied. The results, to the synthetic solution, revealed that the equilibrium time was 60 minutes; the capacity of metals removal improves with the pH increasing (3 to 9), and was maximum at pH 7; the lower the initial concentration of ionic solution (50 to 500 mg L-1), the higher the removal capacity, 52% of Ni2+ and 49% of Mn2+ (initial concentration of 50 mg L-1). In the industrial wastewater, the removal was 61% of Ni2+ and 57% de Mn2+ (300 mg of hydrogel). The results showed that magnetic hydrogels based on alginate synthesized have potential use in the treatment of industrial wastewater contaminated with heavy metals
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Venturini, Pierre. "Synthèse et caractérisation de nanomatériaux hybrides innovants pour le biomédical." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0351/document.

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Depuis quelques décennies, les nanomatériaux et tout particulièrement les nanoparticules d’oxyde de fer (magnétite/maghémite) superparamagnétiques ont connus un intérêt croissant en nano-médecine. Leur biocompatibilité et leurs propriétés magnétiques permettent notamment leur utilisation à des fins de diagnostic (IRM, Imagerie optique et nucléaire…) et de thérapie (Hyperthermie, nano vectorisation…). Au cours de cette thèse, la première étape a consisté à étudier en détails l’influence de plusieurs paramètres de synthèse sur les propriétés finales des nanoparticules d’oxyde de fer magnétique. Cette étude avait pour but de développer et d’optimiser une méthode de synthèse dérivée de la méthode de synthèse classique dite de co-précipitation mais modifiée par ajout de ligand citrates au cours de la synthèse. Des nanoparticules d’oxyde de fer d’une taille pouvant être contrôlée entre 4 et 13 nm recouvertes par une couronne de ligands citrates ont ainsi été synthétisées, celles-ci présentent une aimantation à saturation atteignant jusqu’à 75 emu/g d’oxyde de fer qui est une valeur particulièrement haute pour des nanoparticules de cette taille. Tout au long de ce travail, la caractérisation de ces nanoparticules par un panel étendu de techniques (MET, DRX, Mössbauer, IRTF, XPS, mesures magnétiques, DLS …) à permis notamment d’étudier de façon précise les relations existantes entre la taille, le taux de ligand, la composition et les propriétés magnétiques des nanoparticules synthétisées. Ces nanoparticules fonctionnalisées par des citrates ont ensuite été testées en milieu biologique afin d’évaluer leur internalisation dans les cellules et leur cytotoxicité. Dans un deuxième temps, d’autres travaux ont été menés sur les nanoparticules d’oxyde de fer. Notamment le remplacement des ligands citrates par un polymère bio-inspiré pouvant, selon les fonctions chimiques qui lui sont adjointes, avoir de multiples applications dans le domaine biomédical
From decades now, nanomaterials and especially superparamagnetic iron oxide nanoparticles are studied for their numerous applications in nanomedecine area. The biocompatibility and the magnetic properties of such nano-objects allow their utilization for diagnostic (MRI, optical imagery, PET…) and for therapy application (nanovectorization, hyperthermia…) During this thesis work, the first step was to study the influence of several synthesis parameters on the final properties of the magnetic iron oxide nanoparticles. The aim of this study was the development and the optimization of the widely used way of synthesis by co-precipitation modified by a ligand addition during the growth step of the synthesis. Citrate capped iron oxide nanoparticles with a controlled size between 4 and 13 nm have been synthesized, the saturation magnetization of these nanoparticles reach 75 emu/g of iron oxide, this value is particularly high for nanoparticles of such sizes. During this work, the large panel of characterizations performed on these nanoparticles (TEM, XRD, Mössbauer, FTIR, XPS, DLS, Magnetic measurement) allowed to study precisely the relations between size, ligand ratio, composition and magnetic properties of the synthesized nanoparticles. The interaction between the synthesized citrate capped nanoparticles and biological materials such as human cells have been investigated in-vitro notably to evaluate cells internalization and citotoxicity. In a second step, some additional works have been performed on the citrate capped iron oxide nanoparticles in order to replace the citrate ligand by a bio-inspired polymer (poly-oxazoline). This polymer can have multiple biomedical applications depending of the pendent chemical groups that have been fixed on it
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Cabuil, Valérie. "Ferrofluides a base de maghemite : synthese, proprietes physicochimiques et magneto-optiques." Paris 6, 1987. http://www.theses.fr/1987PA066001.

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Les ferrofluides etudies sont constitues de particules de maghemite solubilisees en milieu aqueux (ferrofluides ioniques) ou non aqueux (ferrofluides surfactes). Le mode de synthese permet de controler les caracteristiques des grains (taille et densite superficielle de charge)
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Jia-FangZhang and 張嘉芳. "Study on synthesis and magnetism of nano-hematite, nano-magnetite and nano-maghemite with different crystal morphologies." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/85525405426568850014.

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碩士
國立成功大學
地球科學系
102
The objective of this study is to investigate the magnetic properties of nano-hematite, nano-magnetite, and nano-maghemite with morphologies of nano-particle, nano-rod, nano-tube, and nano-ring. Four crystal morphologies of nano-hematite are synthesized by a hydrothermal method. Nano-magnetite is prepared via nano-hematite by using carbon reduction method. Nano-maghemite is obtained by oxidation of nano-magnetite. The particle-shaped nano-hematite has a granular morphology with aparticle size of 45~85 nm; the nano-rod is 50~100 nm in width and 250~350 nm in length; nano-tube has a inner-diameter of 40~85 nm width and 150~300 nm length; nano-ring shows a inner-diameter of 20~45 nm and outer-diameter of 70~100 nm. The particle size and morphology of nano-magnetite and nano-maghemite are almost the same as nano-hematite. It exhibits that all nano-hematites have a weak ferro-magnetism with multi-domains, however, all nano-magnetites and nano-maghemites are ferri-magnetic with pseudo-single-domain measured by superconducting quantum interference device magnetometer. The spatial distribution of magnetism are characterized by magnetic force microscopy (MFM). The MFM phase images show bright and dark areas, implying ferro-magnetic domains for nano-magnetite and nano-maghemite. Moreover, it reveals a complicated magnetic arrangement for nano-magnetite and nano-maghemite with crystal shapes of rod, tube and ring. Nano-magnetite and nano-maghemite with particle-shape both have a single-domain. This suggests the crystal structure and morphology have an impact on magnetic properties. The MFM technique could be applied in the explaination of paleomagnetism and environmental implications of fault zones.
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Books on the topic "Maghemite Synthesis"

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Peter, Taylor. Comparison of the solubilities of synthetic hematite (a-Fe203) and maghemite (y-Fe203). Pinawa, Man: AECL, Whiteshell Laboratories, 1997.

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Peter, Taylor. Comparison of the solubilities of synthetic hematite (gas-Feb2s0b3s) and maghemite (gcs-Feb2s0b3s). Pinawa, Man: Whiteshell Laboratories, 1997.

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Book chapters on the topic "Maghemite Synthesis"

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Xue, De-Sheng, Li-Ying Zhang, and Fa-Shen Li. "Synthesis and Mössbauer Study of Maghemite Nanowire Arrays." In ICAME 2003, 41–46. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2852-6_7.

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Balasubramanian, Ragunathan, Anirbid Sircar, and Pandian Sivakumar. "Synthesis and Characterization of Surface Functionalized Maghemite Nano Particle for Biofuel Applications." In Springer Proceedings in Energy, 175–78. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-63085-4_23.

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Dar, M. A., S. G. Ansari, Rizwan Wahab, Young Soon Kim, and Hyung Shik Shin. "The Synthesis of Maghemite and Hematite (γ-Fe2O3, α-Fe2O3) Nanospheres." In Progress in Powder Metallurgy, 157–60. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-419-7.157.

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"Synthesis and surfactant size regulation of nanoparticles of maghemite (γ-Fe2O3)." In Emerging Trends in Engineering, Science and Technology for Society, Energy and Environment, 681–86. CRC Press, 2018. http://dx.doi.org/10.1201/9781351124140-107.

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Azmat, Rafia, Amina Pervaiz, and Summyia Masood. "Synthesis, Characterization, and Activity of Maghemite (γ-Fe2O3) Nanoparticles through a Facile Solvent Hydrothermal Phase Transformation of Fe2O3." In Nanotechnology, 277–94. CRC Press, 2020. http://dx.doi.org/10.1201/9781003082859-16.

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Gárate-Vélez, Lorena, Claudia Escudero-Lourdes, Daniela Salado-Leza, Armando González-Sánchez, Ildemar Alvarado-Morales, Daniel Bahena, Gladis Judith Labrada-Delgado, and José Luis Rodríguez-López. "Anthropogenic Iron Oxide Nanoparticles Induce Damage to Brain Microvascular Endothelial Cells Forming the Blood-Brain Barrier." In Advances in Alzheimer’s Disease. IOS Press, 2021. http://dx.doi.org/10.3233/aiad210010.

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Background: Iron nanoparticles, mainly in magnetite phase (Fe3O4 NPs), are released to the environment in areas with high traffic density and braking frequency. Fe3O4 NPs were found in postmortem human brains and are assumed to get directly into the brain through the olfactory nerve. However, these pollution-derived NPs may also translocate from the lungs to the bloodstream and then, through the blood-brain barrier (BBB), into the brain inducing oxidative and inflammatory responses that contribute to neurodegeneration. Objective: To describe the interaction and toxicity of pollution-derived Fe3O4 NPs on primary rat brain microvascular endothelial cells (rBMECs), main constituents of in vitro BBB models. Methods: Synthetic bare Fe3O4 NPs that mimic the environmental ones (miFe3O4) were synthesized by co-precipitation and characterized using complementary techniques. The rBMECs were cultured in Transwell® plates. The NPs-cell interaction was evaluated through transmission electron microscopy and standard colorimetric in vitro assays. Results: The miFe3O4 NPs, with a mean diameter of 8.45 ± 0.14 nm, presented both magnetite and maghemite phases, and showed super-paramagnetic properties. Results suggest that miFe3O4 NPs are internalized by rBMECs through endocytosis and that they are able to cross the cells monolayer. The lowest miFe3O4 NPs concentration tested induced mid cytotoxicity in terms of 1) membrane integrity (LDH release) and 2) metabolic activity (MTS transformation). Conclusion: Pollution-derived Fe3O4 NPs may interact and cross the microvascular endothelial cells forming the BBB and cause biological damage.
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Conference papers on the topic "Maghemite Synthesis"

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Khoiroh, Lilik, Lisana Rodliya, Nur Aini, and Rachmawati Ningsih. "Synthesis of Maghemite Pigment (γ-Fe2O3) from Lathe Waste Using Precipitation-Calcination Route." In Proceedings of the 2nd International Conference on Quran and Hadith Studies Information Technology and Media in Conjunction with the 1st International Conference on Islam, Science and Technology, ICONQUHAS & ICONIST, Bandung, October 2-4, 2018, Indonesia. EAI, 2020. http://dx.doi.org/10.4108/eai.2-10-2018.2295571.

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Chen, Linfeng, Jining Xie, Kiran R. Aatre, Justin Yancey, Sahitya Chetan, Malathi Srivatsan, and Vijay K. Varadan. "Synthesis of hematite and maghemite nanotubes and study of their applications in neuroscience and drug delivery." In SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, edited by Vijay K. Varadan. SPIE, 2011. http://dx.doi.org/10.1117/12.881843.

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Kour, Satvinder, Rajesh Kumar Sharma, Rohit Jasrotia, and Virender Pratap Singh. "A brief review on the synthesis of maghemite (γ-Fe2O3) for medical diagnostic and solar energy applications." In ADVANCES IN BASIC SCIENCE (ICABS 2019). AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5122451.

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Moran, Emilio, Miguel ïngel Alario-Franco, Marco L. Garcia-Guaderrama, and Oscar Blanco. "Solution-Combustion Synthesis and Study of : γ-Fe2-xCrxO3(0.75 ≤ x ≤ 1.25) Maghemite-like Materials." In 2008 MRS Fall Meetin. Materials Research Society, 2008. http://dx.doi.org/10.1557/proc-1148-pp01-09.

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Sandri, Monica, Michele Iafisco, Silvia Panseri, Elisa Savini, and Anna Tampieri. "Fully Biodegradable Magnetic Micro-Nanoparticles: A New Platform for Tissue Regeneration and Theranostic." In ASME 2013 2nd Global Congress on NanoEngineering for Medicine and Biology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/nemb2013-93223.

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Nowadays, magnetic materials are receiving special attention due to their potential applications in different fields and in particular in medicine. Magnetic micro-nano-particles have been progressively employed as support materials for enzyme immobilization, and have been used as drug-delivery vehicles, contrast agents for magnetic resonance imaging as well as heat mediators for hyperthermia-based anti-cancer treatments and many other exciting biomedical applications. Magnetic materials have also attracted a big interest in the field of bone tissue regeneration because it has been demonstrated that magnetic nanoparticles have effect of osteoinduction even without external magnetic force. Therefore, one of the most big challenge in this field is the production of magnetic materials with good biocompatibility and biodegradability. In fact, the long-term effects in the human body of iron oxide (maghemite or magnetite), the most popular magnetic phase used in medicine and biotechnology, are not yet completely assessed. To this aim, in this work we developed an innovative biocompatible and bioresorbable superparamagnetic-like phase by doping nano-hydroxyapatite with Fe2+/Fe3+ ions (FeHA). Moreover the same magnetic nanoparticles were used as nano-particulate emulsifier for the preparation of hollow hybrid Fe-HA-poly(L-lactic) acid (PLLA) micro-nano-spheres. PLLA has been used because poly(α-hydroxy-esters) are the most frequently used synthetic polymers for biomedical applications owing to their biocompatibility, hydrolytic degradation process and proper mechanical properties. These micro-nanospheres could be used as new type of scaffold for hard tissue regeneration. In fact, spherical scaffold display several advantages respect to the monolithic counterpart e.g., (i) improving control over sustained delivery of therapeutic agents, signalling biomolecules and even pluripotent stem cells, (ii) serving as stimulus-sensitive delivery vehicles for triggered release, (iii) introducing porosity and/or improve the mechanical properties of bulk scaffolds by acting as porogen or reinforcement phase, (iv) supplying compartmentalized micro-reactors for dedicated biochemical processes, (v) functioning as cell delivery vehicle, and, finally, (vi) giving possibility of preparing injectable and/or mouldable formulations to be applied by using minimally invasive surgery. Moreover, the same magnetic materials could find applications in nanomedicine as a multifunctional carrier. Their magnetic functionality could be utilized to move them into the body towards target organs by an external magnetic field. Furthermore, the superparamagnetic feature of the nanoparticles could allow to tailor the release of the therapeutic agent by switching (on-off) the external magnetic field and/or to treat cancer cells by hyperthermia.
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