Magnetic nanoparticles produced by surfactant-assisted ball milling V. M. Chakka, B. Altuncevahir, Z. Q. Jin, Y. Li, and J. P. Liua Department of Physics, The ...
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Apr 24, 2006 Nanoparticles of Fe, Co, FeCo, SmCo, and NdFeB systems with sizes smaller than 30 nm and narrow size distribution have been successfully prepared by ball milling in the presence of surfactants and organic carrier liquid. It has been observed that the nanoparticles prepared by milling Fe and FeCo powders were close to spherical in their shapes, whereas those of Co, SmCo, and
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Apr 01, 2006 Magnetic nanoparticles produced by surfactant-assisted ball milling. Nanoparticles of Fe, Co, FeCo, SmCo, and NdFeB systems with sizes smaller than 30 nm and narrow size distribution have been successfully prepared by ball milling in the presence of surfactants and organic carrier liquid. It has been observed that the nanoparticles prepared by ...
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Hard magnetic nanoparticles based on the Sm2Co17 and SmCo5 systems have been successfully produced using a surfactant-assisted ball milling technique. A size-selection process has been developed to obtain nanoparticles of different sizes with narrow size distribution. Significant room-temperature coercivity up to 3.1 kOe has been achieved with the
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Oct 12, 2007 Hard magnetic nanoparticles based on the Sm 2 Co 17 and SmCo 5 systems have been successfully produced using a surfactant-assisted ball milling technique. A size-selection process has been developed to obtain nanoparticles of different sizes with narrow size distribution.
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Apr 24, 2006 Nanoparticles of Fe, Co, FeCo, SmCo, and NdFeB systems with sizes smaller than 30 nm and narrow size distribution have been successfully prepared by ball milling in the presence of surfactants and organic carrier liquid. It has been observed that the nanoparticles
MoreOct 12, 2007 Hard magnetic nanoparticles based on the Sm 2 Co 17 and SmCo 5 systems have been successfully produced using a surfactant-assisted ball milling technique. A size-selection process has been developed to obtain nanoparticles of different sizes with narrow size distribution.
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Surfactant Effects on the Structural and Magnetic Properties of Iron Oxide Nanoparticles Maria Filippousi,*,† Mavroeidis Angelakeris,‡ Maria Katsikini,‡ Eleni Paloura,‡ Ilias Efthimiopoulos,§ Yuejian Wang,§ Demetris Zamboulis,∥ and Gustaaf Van Tendeloo† †EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium ‡Department of Solid State Physics, School of ...
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Iron oxide nanoparticles were prepared using the simplest and most efficient chemical route, the coprecipitation, in the absence and the presence of three different and widely used surfactants. The purpose of this study is to investigate the possible influence of the different surfactants on the structure and therefore on the magnetic properties of the iron oxide nanoparticles. Thus, different ...
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The magnetite nanoparticles produced Aqueous system by this method are nearly spherical with a mean size ranging from 10 to 30 nm depending on the exper- Surfactant-free imental conditions.
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Jun 01, 2015 By using a holmium analogue of a common di-chain surfactant didodecyldimethylammonium bromide (DDAB), it was shown that the resulting nanoparticles had electrophoretic mobilities three times larger than the analogous non-magnetic systems (− 5.9 × 10 − 10 m 2 V − 1 s − 1 and − 17.6 10 − 10 m 2 V − 1 s − 1, respectively), and ...
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Jun 09, 2020 Surfactin is one of the main lipopeptide biosurfactants produced by different species of Bacillus subtilis.This study aims to analyze the effect of starch‐coated Fe 0 and Fe 3+ nanoparticles on the biomass and biosurfactant production of Bacillus subtilis.Out of 70 soil samples, 20 Bacillus were isolated and genome sequenced by biochemical methods and 16S rRNA gene.
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To synthesize the surfactant-stabilized aqueous mag-netic fluids, we used a two-step process, in which the surfactants form oriented coatings on the dispersed nanoparticles.9 Specifically,magnetitenanoparticleswere produced by precipitation from a solution of ferrous and ferric chloride and a fatty acid. During the precipitation,
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growth of Co nanoparticles synthesized by chemical routes. By varying the surfactant species, Co nanoparticles of different morphologies under similar reaction conditions (e.g., temperature and Co-precursor concentration) were produced. Depending on the surfactant species, the growth of Co nanoparticles followed three different growth
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2009 APS March Meeting Volume 54, Number 1 Monday–Friday, March 16–20, 2009; Pittsburgh, Pennsylvania
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For biomedical applications like magnetic resonance imaging, magnetic cell separation or magnetorelaxometry, where particle size plays a crucial role, magnetic nanoparticles produced by this method are very useful. Viable iron precursors include Fe 3, Fe(CO) 5, or Fe 3 in organic solvents with surfactant molecules. A combination of Xylenes and ...
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Jan 28, 2019 Magnetic Nanomaterials 1. Magnetic Nanoparticles 1 Magnetic Nanoparticles(MNPs) are the type of nanoparticles that can be easily tracked, manipulated and targeted by external magnetic field. The MNPs have been the focus of the research these days due to its properties which could increase the potential use of Nanomaterial based catalysis, data storage and optical fibers. Elements
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Oct 17, 2012 FFs, on the other hand, are ultrastable suspensions of magnetic nanoparticles (size around 10 nm) dispersed in a liquid carrier. From the magnetic point of view, these particles are single-domain and therefore, FFs behave as superparamagnetic systems (Charles, 2002; Rosensweig, 1985). The term superparamagnetism is used to describe the magnetic ...
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In this ture for preparing magnetic nanoparticles in reverse study, three surfactant concentrations (30, 33, and 36 wt%) microemulsions [7]. The maximum value of theoretical were selected to determine the effect of surfactant concen- yield being 0.4 g of magnetic particles per 100 g of total tration on the synthesis of magnetic particles in ...
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We describe the synthesis of highly magnetic iron nanoparticles using a novel surfactant, a β-diketone. We have produced 6 nm iron nanoparticles with an unusually high saturation magnetization of more than 80% the value of bulk iron. Additionally, we measured a particle susceptibility of 14 (MKS units), which is far above the value possible for micron-scale spherical particles.
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Magnetic orientational linear dichroism (MOLD) spectroscopy was found to be useful for detecting the initiation of the agglomeration process of COOH-modified iron-oxide magnetic nanoparticles (MNPs) in water, which was produced by the addition of a small amount of a cationic surfactant or a metal ion.
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Oct 15, 2015 In our present work, magnetic cobalt ferrite (CoFe 2 O 4) nanoparticles have been successfully synthesised by thermal decomposition of Fe(III) and Co(II) acetylacetonate compounds in organic solvents in the presence of oleic acid (OA)/ oleylamine (OLA) as surfactants and 1,2-hexadecanediol (HDD) or octadecanol (OCD-ol) as an accelerating agent.As a result, CoFe 2 O 4 nanoparticles
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Jun 06, 2021 Experimental parameters, such as reaction time, temperature, surfactant concentration, solvent, precursor ratio, and accelerating agent, in particular, the role of HDD, OCD-ol, and OA/OLA have been intensively investigated in detail to discover the best conditions for the synthesis of the above magnetic nanoparticles.
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3.3. Magnetic properties Magnetic properties of Fe 3O 4 nanoparticles were measured by VSM at 300 K, shown in Fig. 4. No magnetic hysteresis loop appears in magnetization curve of Fe 3O 4 nanoparticles, exhibiting super-para-magnetism with 74.86 emu/g saturation magnetization. 4. Conclusions Utilizing high purity iron separated from iron ore ...
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1. A composition of magnetic nanoparticles comprising: a. a plurality of magnetic nanoparticles produced by surfactant-assisted ball milling, wherein the magnetic nanoparticles have an average size below about 100 nm; and b. the magnetic nanoparticles comprise at least one of FeO, Fe 2 O 3, Fe 3 O 4, Co, Fe, Ni, CoFe, NiFe, CoO, NiO and ferrites including MFe 2 O 3 where M comprises one
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Nov 10, 2020 Here Brown relaxation time was altered to enhance magnetic hyperthermia value. Narrow size distributed, hydrophobic Fe3O4 nanoparticles were synthesized by solvothermal reflux method. It is reported that the existing both single step and two-step ligand exchange protocols could not replace hydrophobic surfactant ligand completely. Hence, as-synthesized samples were transferred
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Nanoparticles of Fe3O4 have been successfully synthesized using a simple coprecipitation technique from natural iron sands, employing HNO3 and NH4OH as dispersing and precipitating agents, respectively. The substitution of Fe with Mn to result in Fe3-xMnxO4 (0 ≤ x ≤ 3) was conducted to control the magnetic strength of this nano‐sized spinel powder.
MoreFor biomedical applications like magnetic resonance imaging, magnetic cell separation or magnetorelaxometry, where particle size plays a crucial role, magnetic nanoparticles produced by this method are very useful. Viable iron precursors include Fe 3, Fe(CO) 5, or Fe 3 in organic solvents with surfactant molecules. A combination of Xylenes and ...
MoreJan 28, 2019 Magnetic Nanomaterials 1. Magnetic Nanoparticles 1 Magnetic Nanoparticles(MNPs) are the type of nanoparticles that can be easily tracked, manipulated and targeted by external magnetic field. The MNPs have been the focus of the research these days due to its properties which could increase the potential use of Nanomaterial based catalysis, data storage and optical fibers. Elements
More
Magnetic investigations revealed that samples prepared using amine as a multifunctional agent (only one surfactant) shows superior magnetic properties than the nanoparticles produced by the approach utilizing oleic acid and oleylamine. To understand the influence of surface organic-inorganic interactions on the magnetic properties of magnetic ...
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prepared magnetite nanoparticles in the size range of 30-100 nm by oxidizing ferrous hydroxide in reaction with a weak oxidant in a N 2-deaerated aqueous NaOH solution at different temperatures and in the absence of surfactant [20]. Fauziatul et al. synthesized magnetite nanoparticles in the size range of 10-30 nm by surfactant-free electrochemical
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Jun 01, 2003 We describe the synthesis of highly magnetic iron nanoparticles using a novel surfactant, a {beta}-diketone. We have produced 6 nm iron nanoparticles with an unusually high saturation magnetization of more than 80% the value of bulk iron. Additionally, we measured a particle susceptibility of 14 ...
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